Ellingson Publications




Recent Publications

 

  1. Dipendra Pokhrel, Ebin Bastola, Adam B. Phillips, Michael J. Heben, and Randy J. Ellingson. "Aspect ratio controlled synthesis of tellurium nanowires for photovoltaic applications." Materials Advances (2020), 1, 2721 - 2728.  DOI: 10.1039/D0MA00394H
  2. Cong Chen, Zhaoning Song, Chuanxiao Xiao, Rasha A. Awni, Canglang Yao, Niraj Shrestha, Chongwen Li, Sandip Singh Bista, Yi Zhang, Lei Chen, Randy J. Ellingson, Chun-Sheng Jiang, Mowafak Al-Jassim, Guojia Fang, and Yanfa Yan.  "Arylammonium-assisted reduction of the open-circuit voltage deficit in wide-bandgap perovskite solar cells: the role of suppressed ion migration."  ACS Energy Letters 0, 5, DOI: 10.1021/acsenergylett.0c01350
  3. Bhandari, K. P., Alfadhili, F. K., Bastola, E., Watthage, S.C., Song, Z., Liyanage, G. K., Phillips, A. J., Heben, M. J., and Ellingson, R. J.  "Very high VOC and FF of CdTe thin-film solar cells with the applications of organo-metallic halide perovskite thin film as a hole transport layer." Prog Photovolt Res Appl. (2020), 1-10. https://doi.org/10.1002/pip.3309
  4. Deng-Bing Li, Sandip S. Bista, Zhaoning Song, Rasha A. Awni, Kamala K. Subedi, Niraj Shrestha, Puja Pradhan, Lei Chen, Ebin Bastola, Corey R. Grice, Adam B. Phillips, Michael J.Heben, Randy J. Ellingson, and Yanfa Yan.  "Maximize CdTe solar cell performance through copper activation engineering." Nano Energy (2020) 73, 104835.  DOI:  10.1016/j.nanoen.2020.104835
  5. Deng-Bing Li, Zhaoning Song, Sandip S. Bista, Fadhil K. Alfadhili, Rasha A. Awni, Niraj Shrestha, DeMilt Rhiannon, Adam B. Phillips, Michael J. Heben, Randy J. Ellingson, Feng Yan, and Yanfa Yan.  "CuSCN as the Back Contact for Efficient ZMO/CdTe Solar Cells."  Materials (2020) 13, 1991.  DOI: 10.3390/ma13081991.
  6.  Xiaolu Zheng, Zhaoning Song, Zhiliang Chen, Sandip Singh Bista, Pengbin Gui, Niraj Shrestha, Cong Chen, Chongwen Li, Xingxin Yin, Rasha Awni, Hongwei Lei, Tao Chen, Randy Ellingson, Yanfa Yan, Guojia Fang.  "Interface Modification of Sputtered NiOx as the Hole-Transporting Layer for Efficient Inverted Planar Perovskite Solar Cells."  Journal of Materials Chemistry C (2020) 8, 1972-1980.  DOI:  10.1039/C9TC05759E.
  7. Rasha A. Awni, Zhaoning Song, Cong Chen, Chongwen Li, Changlei Wang, Mohammed A. Razooqi, Lei Chen, Xiaoming Wang, Randy J. Ellingson, Jian V. Li, and Yanfa Yan.  "Influence of Charge Transport Layers on Capacitance Measured in Halide Perovskite Solar Cells."  Joule (2020) 4, 644-657.  DOI:  10.1016/j.joule.2020.01.012.
  8. Dipendra Adhikari, Maxwell M. Junda, Ebin Bastola, Prakash Koirala, Randall J. Ellingson, Robert W. Collins, Nikolas J. Podraza.  "Glancing angle deposited CdTe: Nanostructured films and impact on solar cell performance."  Surface and Coatings Technology, (2020) 381, 125127.  DOI: 10.1016/j.surfcoat.2019.125127
  9. Niraj Shrestha, Zhaoning Song, Cong Chen, Ebin Bastola, Xiaoming Wang, Yanfa Yan, and Randy J. Ellingson.  "Charge compensating defects in methylammonium lead iodide perovskite suppressed by formamidinium inclusion."  The Journal of Physical Chemistry Letters (2020) 11 (1), 121-128.  DOI: 10.1021/acs.jpclett.9b03234

    2014 - 2019

  10. Ebin Bastola, Kamala Khanal Subedi, Fadhil K. Alfadhili, Adam B. Phillips, Michael J. Heben, and Randy J. Ellingson. "Room Temperature Processed Transparent Cu-Zn-S Nanocomposites as Hole Transport Materials in CdTe Photovoltaics." In 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC), pp. 0144-0148. IEEE, 2019.  DOI:  10.1109/PVSC40753.2019.8981335
  11. Bastola, E., Alfadhili, F., Phillips, A., Heben, M., & Ellingson, R. "Wet chemical etching of cadmium telluride photovoltaics for enhanced open-circuit voltage, fill factor, and power conversion efficiency."  Journal of Materials Research (2019), 34(24), 3988-3997. doi:10.1557/jmr.2019.363
  12. Zhaoning Song, Chongwen Li, Cong Chen, Jeremiah McNatt, Woojun Yoon, David Scheiman, Phillip P. Jenkins, Randy J. Ellingson, Michael J. Heben, and Yanfa Yan.  "High remaining factors in the photovoltaic performance of perovskite solar cells after high-fluence electron beam irradiations."  The Journal of Physical Chemistry C (2019, Article ASAP). DOI: 10.1021/acs.jpcc.9b11483
  13. Cong Chen, Zhaoning Song, Chuanxiao Xiao, Dewei Zhao, Niraj Shrestha, Chongwen Li, Guang Yang, Fang Yao, Xiaolu Zheng, Randy J. Ellingson, Chun-Sheng Jiang, Mowafak Al-Jassim, Kai Zhu, Guojia Fang, and Yanfa Yan.  "Achieving a high open-circuit voltage in inverted wide-bandgap perovskite solar cells with a graded perovskite homojunction." Nano Energy (2019) 141-147.  DOI:  10.1016/j.nanoen.2019.04.069
  14. Dengbing Li, Zhaoning Song, Rasha A. Awni, Sandip S. Bista, Niraj Shrestha, Corey R. Grice, Lei Chen, Geethika K. Liyanage, Mohammed A. Razooqi, Adam B. Phillips, Michael J. Heben, Randy J. Ellingson, and Yanfa Yan.  " Eliminating S-kink to maximize the performance of MgZnO/CdTe solar cells."  ACS Applied Energy Materials (2019) 2896-2903.  DOI:  10.1021/acsaem.9b00233
  15. Rasha A. Awni, Deng-Bing Li, Corey R. Grice, Zhaoning Song, Mohammed A. Razooqi, Adam B. Phillips, Sandip Singh Bista, Paul J. Roland, Fadhil K. Alfadhili, Randy J. Ellingson, Michael J. Heben, Jian V. Li, and Yanfa Yan.  "The effects of hydrogen iodide back surface treatment on CdTe solar cells."  Solar RRL (2019) 1800304.   DOI:  10.1002/solr.201800304
  16. Xinxing Yin, Scott A McClary, Zhaoning Song, Dewei Zhao, Brian Graeser, Changlei Wang, Niraj Shrestha, Xiaoming Wang, Cong Chen, Chongwen Li, Kamala K Subedi, Randy J Ellingson, Weihua Tang, Rakesh Agrawal, and Yanfa Yan .  "A Cu3PS4 nanoparticle hole selective layer for efficient inverted perovskite solar cells."  J. Mat. Chem. A (2019), 4604-4610.  DOI:  10.1039/C8TA12100A
  17. Chongwen Li, Zhaoning Song, Dewei Zhao,* Chuanxiao Xiao, Biwas Subedi, Niraj Shrestha, Maxwell M. Junda, Changlei Wang, Chun-Sheng Jiang, Mowafak Al-Jassim, Randy J. Ellingson, Nikolas J. Podraza, Kai Zhu, and Yanfa Yan.  "Reducing saturation-current density to realize high-efficiency low-bandgap mixed tin–lead halide perovskite solar cells."  Adv. Energy Mater. (2018), 1803135.  DOI: 10.1002/aenm.201803135
  18. Zhaoning Song, Niraj Shrestha, Suneth Watthage, Geethika Liyanage, Zahrah Almutawah, Ramez Ahangharnejhad, Adam Phillips, Randy Ellingson, and  Michael Heben. "Impact of moisture on photoexcited charge carrier dynamics in methylammonium lead halide perovskites."  J. Chem. Phys. Lett. (2018), 6312–6320. DOI: 10.1021/acs.jpclett.8b02595       
  19. Changlei Wang, Zhaoning Song, Yue Yu, Dewei Zhao, Rasha A. Awni, Corey R. Grice, Niraj Shrestha, Randy J. Ellingson, Xingzhong Zhao, and Yanfa Yan.  "Synergistic effects of thiocyanate additive and cesium cations on improving the performance and initial illumination stability of efficient perovskite solar cells."  Sustainable Energy Fuels (2018), 2435.  DOI: 10.1039/c8se00200b
  20. Yuhao Sun, Changlei Wang, Dewei Zhao, Jiangsheng Yu, Xinxing Yin, Corey R. Grice, Rasha A. Awni, Niraj Shrestha, Yue Yu, Lei Guan, Randy J. Ellingson, Weihua Tang, and Yanfa Yan.  “A New Hole Transport Material for Efficient Perovskite Solar Cells With Reduced Device Cost.”  Sol. RRL (2018), 2 1700175. DOI:10.1002/solr.201700175
  21. Niraj Shrestha, Dhurba R. Sapkota, Kamala K. Subedi, Puja Pradhan, Prakash Koirala, Adam B. Phillips, Robert W. Collins, Michael J. Heben, and Randy J. Ellingson.  "Identification of defect levels in copper indium diselenide (CuInSe2) thin films via photoluminescence studies."  MRS Advances (2018), 1-7, DOI: 10.1557/adv.2018.556
  22. Niraj Shrestha, Corey R. Grice, Ebin Bastola, Geethika K. Liyanage, Adam B. Phillips, Michael J. Heben, Yanfa Yan, and Randy J. Ellingson.  "Low temperature photoluminescence spectroscopy of defect and interband transitions in CdSexTe1-x thin films."  MRS Advances (2018), 1-7, DOI: 10.1557/adv.2018.516
  23. Xinxing Yin, Changlei Wang, Dewei Zhao, Niraj Shrestha, Corey R. Grice, Lei Guan, Zhaoning Song, Cong Chen, Chongwen Li, Guoli Chi, Baojing Zhou, Jiangsheng Yu, Zhuohan Zhang, Randy J. Ellingson, Jie Zhou, Yanfa Yan, Weihua Tang.  "Binary hole transport materials blending to linearly tune HOMO level for high efficiency and stable perovskite solar cells". Nano Energy (2018), 680-687.  DOI:  10.1016/j.nanoen.2018.07.027
  24. K. Subedi, E. Bastola, I. Subedi, Z. Song, K. Bhandari, A. Phillips, N. Podraza, M. Heben, and R. Ellingson.  "Nanocomposite (CuS)x(ZnS)1-x thin film back contact for CdTe solar cells: Toward a bifacial device".  Solar Energy Mat. and Solar Cells (2018), 186, 227-235.  DOI:  10.1016/j.solmat.2018.06.025
  25. Z. Almutawah, S. Watthage, Z. Song, R. Ahangharnejhad, K. Subedi, N. Shrestha, A. Phillips, Y. Yan, R. Ellingson, and M. Heben. "Enhanced Grain Size and Crystallinity in CH3NH3PbI3 Perovskite Films by Metal Additives to the Single-Step Solution Fabrication Process". MRS Advances (2018), 1-6. DOI:10.1557/adv.2018.413
  26. E. Bastola, K. Bhandari, I. Subedi, N. Podraza, and R. Ellingson.  "Structural, optical, and hole transport properties of earth-abundant chalcopyrite (CuFeS2) nanocrystals". MRS Communications (2018), 1-9. DOI:10.1557/mrc.2018.117
  27. Suneth C. Watthage, Adam B. Phillips, Geethika K. Liyanage, Zhaoning Song, Jacob M. Gibbs, Fadhil K. Alfadhili, Rabee B. Alkhayat, Ramez H. Ahangharnejhad, Zahrah S. Almutawah, Khagendra P. Bhandari, Randy J. Ellingson, and Michael J. Heben.  "Selective Cd Removal from CdTe for High Efficiency Te Back Contact Formation".  IEEE J. Photovoltaics (2018), 1125-1131.  DOI: 10.1109/JPHOTOV.2018.2830302
  28. Puja Pradhan, Puruswottam Aryal, Dinesh Attygalle, Abdel-Rahman Ibdah, Prakash Koirala, Jian Li, Khagendra P. Bhandari, Geethika K. Liyanage, Randy J. Ellingson, Michael J. Heben, Sylvain Marsillac, Robert W. Collins, and Nikolas J. Podraza.  "Real Time Spectroscopic Ellipsometry Analysis of First Stage CuIn1-xGaxSe2: Indium-Gallium Selenide Co-Evaporation".  Materials (2018), 11, 145.  DOI:10.3390/ma11010145
  29. Lei Guan, Xinxing Yin, Dewei Zhao, Changlei Wang, Qiaoshi An, Jiangsheng Yu, Niraj Shrestha, Corey Grice, Rasha Awni, Yue Yu, Zhaoning Song, Jie Zhou, Weiwei Meng, Fujun Zhang, Randy Ellingson, Jianbo Wang, Weihua Tang, and Yanfa Yan.  "Cost-Effective Hole Transporting Material for Stable and Efficient Perovskite Solar Cells with Fill Factors up to 82%".  J. Mater. Chem. A (2017), 5, 23319.  DOI:  10.1039/c7ta08053k
  30. Ilke Celik, Adam B. Phillips, Zhaoning Song, Yanfa Yan, Randy J. Ellingson, Michael J. Heben and Defne Apul.  "Environmental analysis of perovskites and other relevant solar cell technologies in a tandem configuration". Energy Environ. Sci. (2017) 10, 1874-1884.  DOI:  10.1039/C7EE01650F
  31. Xinxing Yin, Lei Guan, Jiangsheng Yu, Dewei Zhao, Changlei Wang, Niraj Shrestha, Yingbin Han, Qiaoshi An, Jie Zhou, Baojing Zhou, Yue Yu, Corey R. Grice, Rasha Abbas Awni, Fujun Zhang, Jianbo Wang, Randy J. Ellingson, Yanfa Yan, and Weihua Tang.  "One-step facile synthesis of a simple carbazole-cored hole transport material for high-performance perovskite solar cells". Nano Energy (2017) 40, 163-169.  DOI:  10.1016/j.nanoen.2017.08.016.
  32. Zhaoning Song, Jérémie Werner, Suneth C. Watthage, Florent Sahli, Niraj Shrestha, Stefaan De Wolf, Björn Niesen, Adam B. Phillips, Christophe Ballif, Randy J. Ellingson, and Michael J. Heben. "Imaging the Spatial Evolution of Degradation in Perovskite/Si Tandem Solar Cells After Exposure to Humid Air." IEEE Journal of Photovoltaics (2017) 1-610.1109/JPHOTOV.2017.2748720
  33. Jiang, Z., Krysmann, M., Kelarakis, A., Koutnik, P., Anzenbacher, P., Roland, P., Ellingson, R. J., and Sun, L. "Understanding the Photoluminescence Mechanism of Carbon Dots". MRS Advances (2017),2(51), 2927-2934. doi:10.1557/adv.2017.461
  34. Khan, S., Jiang, Z., Premathilka, S., Hu, J., Voevodin, A., Roland, P., Ellingson, R. J., and Sun, L. "Ultrathin Colloidal PbS/CdS Core/Shell Nanosheets". MRS Advances (2017), 1-6. doi:10.1557/adv.2017.327
  35. Ebin Bastola, Khagendra P. Bhandari, and Randy J. Ellingson.  "Application of Composition Controlled Nickel-alloyed Iron Sulfide Pyrite Nanocrystal Thin Films as the Hole Transport Layer in Cadmium Telluride Solar Cells."  J. Materials Chemistry C (2017) 5, 4996-5004.  DOI: 10.1039/C7TC00948H
  36. Yue Yu, Changlei Wang, Corey Grice, Niraj Shrestha, Dewei Zhao, Weiqiang Liao, Lei Guan, Rasha Awni, Weiwei Meng, Alexander Cimaroli, Kai Zhu, Randy Ellingson, and Yanfa Yan. "Synergistic Effects of Lead Thiocyanate Additive and Solvent Annealing on the Performance of Wide-bandgap Perovskite Solar Cells."  ACS Energy Letters (2017) 2, 1177-1182.  DOI:  10.1021/acsenergylett.7b00278
  37. Changlei Wang, Dewei Zhao, Yue Yu, Niraj Shrestha, Corey R. Grice, Weiqiang Liao, Alexander J. Cimaroli, Jing Chen, Randy J. Ellingson, Xingzhong Zhao, Yanfa Yan. "Compositional and morphological engineering of mixed cation perovskite films for highly efficient planar and flexible solar cells with reduced hysteresis."  Nano Energy (2017) 35, 223-232.  DOI:  10.1016/j.nanoen.2017.03.048
  38. Dewei Zhao, Yue Yu, Changlei Wang, Weiqiang Liao, Niraj Shrestha, Corey R Grice, Alexander J Cimaroli, Lei Guan, Randy J Ellingson, Kai Zhu, Xingzhong Zhao, Ren-Gen Xiong, Yanfa Yan.  "Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells."  Nature Energy (2017) 2, 17018.   DOI:  doi:10.1038/nenergy.2017.18
  39. Khagendra P. Bhandari,  Xinxuan Tan,  Peymon Zereshki,  Fadhil K. Alfadhili,  Adam B. Phillips,  Prakash Koirala, Michael J. Heben,  Robert W. Collins, Randy J. Ellingson.  "Thin film iron pyrite deposited by hybrid sputtering/​co-evaporation as a hole transport layer for sputtered CdS/​CdTe solar cells."  Solar Energy Mat. and Solar Cells (2017) 163, 277-284.  DOI:  10.1016/j.solmat.2017.01.044
  40. Jie Ge, Paul J. Roland, Prakash Koirala, Weiwei Meng, James L. Young, Reese Petersen, Todd G Deutsch, Glenn Teeter, Randy J. Ellingson, Robert W. Collins, and Yanfa Yan.  "Employing Overlayers to Improve the Performance of Cu2BaSnS4 Thin Film based Photoelectrochemical Water Reduction Devices. Chem. Mater. (2017, accepted).   DOI: 10.1021/acs.chemmater.6b03347
  41. Yushuai Dai, Stephen Polly, Staffan Hellstroem, Michael Slocum, Zachary Bittner, David V. Forbes, Paul Roland, Randy Ellingson, and Seth M. Hubbard.  "Effect of electric field on carrier escape mechanisms in quantum dot intermediate band solar cells."  J. Appl. Phys. (2017) 121, 013101.  DOI:  10.1063/1.4972958
  42. Suneth C. Watthage, Zhaoning Song, Niraj Shrestha, Adam B. Phillips, Geethika K. Liyanage, Paul J. Roland, Randy J. Ellingson, Michael J. Heben. "Enhanced Grain Size, Photoluminescence, and Photoconversion Efficiency with Cadmium Addition During the Two-Step Growth of CH3NH3PbI3.ACS Appl. Mater. Interfaces (2017) 9, 2334−2341.  DOI:  10.1021/acsami.6b12627
  43. Jie Ge, Prakash Koirala, Corey R Grice, Paul J Roland, Yue Yu, Xinxuan Tan, Randy J Ellingson, Robert W Collins, Yanfa Yan.  "Oxygenated CdS Buffer Layers Enabling High Open-Circuit Voltages in Earth-Abundant Cu2BaSnS4 Thin-Film Solar Cells."  Adv. En. Mat. (2017) 1601803.  DOI:  10.1002/aenm.201601803
  44. Z. Song, J. Werner, N. Shrestha, F. Sahli, S. De Wolf, B. Niesen, S. C. Watthage, A. B Phillips, C. Ballif, R. J. Ellingson, M. J. Heben.  "Probing Photocurrent Nonuniformities in the Subcells of Monolithic Perovskite/Silicon Tandem Solar Cells."  J. Phys. Chem. Lett. (2016) 7, 5114–5120. DOI: 10.1021/acs.jpclett.6b02415
  45. K. P. Bhandari, X. Tan, P. Zereshki, R. W. Collins, R. J. Ellingson.  "CdTe solar cells with iron pyrite thin film back contacts fabricated by a hybrid sputtering/co-evaporation process."  43rd IEEE Photovoltaic Specialists Conference (PVSC), 1425-1428 (2016).
  46. P. J. Roland, K. P. Bhandari, R. J. Ellingson. "Electronic circuit model for evaluating S-kink distorted current-voltage curves." 43rd IEEE Photovoltaic Specialists Conference (PVSC), 3091-3094 (2016).
  47. A. J. Huckaba, P. Sanghyun, G. Grancini, E. Bastola, C. K. Taek, L. Younghui, K. P. Bhandari, C. Ballif, R. J. Ellingson, M. K. Nazeeruddin.  "Exceedingly Cheap Perovskite Solar Cells Using Iron Pyrite Hole Transport Materials."  Chemistry Select (2016) 1 5316.
  48. Shreedhar R.Kandel, Shailendra Chiluwal, Zhoufeng Jiang, Paul Roland, Kamal Subedi, Douglas M. Dimick, Pavel Moroz, Mikhail Zamkov, Randy Ellingson, Jianjun Hu, Andrey Voevodin, and Liangfeng Sun.  "One-dimensional growth of colloidal PbSe nanorods with chloroalkanes."  Phys. Status Solidi Rapid Res. Lett. (2016), DOI: 10.1002/pssr.201600278  
  49. Weiqiang Liao, Dewei Zhao, Yue Yu, Niraj Shrestha, Kiran Ghimire, Corey Grice, Changlei Wang, Yuqing Xiao, Alexander Cimaroli, Randy Ellingson, Nikolas Podraza, Kai Zhu, Ren-Gen Xiong, and Yanfa Yan.  "Fabrication of Efficient Low-Bandgap Perovskite Solar Cells by Combining Formamidinium Tin Iodide with Methylammo-nium Lead Iodide."  JACS (2016), 138, 12360–12363.  DOI: 10.1021/jacs.6b08337
  50. Yue Yu, Changlei Wang, Corey R. Grice, Niraj Shrestha, Jing Chen, Dewei Zhao, Weiqiang Liao, Alexander J. Cimaroli, Paul J. Roland, Randy J. Ellingson, and Yanfa Yan.  "Improving the Performance of Formamidinium and Cesium Lead Triiodide Perovskite Solar Cells Using Lead Thiocyanate Additives."  Chem. Sus. Chem. (2016) 9, 3288 –3297.  DOI: 10.1002/cssc.201601027
  51. Adam Phillips, Zhaoning Song, Jonathan DeWitt, Jon Stone, Patrick Krantz, John Royston, Ryan Zeller, Meghan Mapes, Paul Roland, Mark Dorogi, Syed Zafar, Gary Faykosh, Randy Ellingson, and Michael Heben.  "High Speed, Intermediate Resolution, Large Area Laser Beam Induced Current Imaging and Laser Scribing System for Photovoltaic Devices and Modules."  Rev. Sci. Instruments (2016), 87, 093708.
  52. Ebin Bastola, Khagendra P. Bhandari, Anthony J. Matthews, Niraj Shrestha, Randy J. Ellingson.  "Elemental anion thermal injection synthesis of nanocrystalline marcasite iron dichalcogenide FeSe2 and FeTe2."  RSC Advances (2016): 69708-69714.  DOI: 10.1039/C6RA06351A.
  53. Changlei Wang, Dewei Zhao, Corey R. Grice, Weiqiang Liao, Yue Yu, Alexander Cimaroli, Niraj Shrestha, Paul J. Roland, Jing Chen, Zhenhua Yu, Pei Liu, Nian Cheng, Randall J. Ellingson, Xingzhong Zhao, and Yanfa Yan.  "Low-temperature plasma-enhanced atomic layer deposition of tin oxide electron selective layers for highly efficient planar perovskite solar cells."  J. Mat. Chem. A (2016), 4, 12080-12087.  DOI: 10.1039/C6TA04503K.
  54. Simeen Khan, Zhoufeng Jiang, Shashini Premathilka, Antara Antu, Jianjun Hu, Andrey Voevodin, Paul Roland, Randy Ellingson, Liangfeng Sun.  "Few-Atom-Thick Colloidal PbS/CdS Core/Shell Nanosheets."  Chem. Mat. (2016), DOI: 10.1021/acs.chemmater.6b01232.
  55. Indra Subedi, Khagendra Bhandari, Randall Ellingson, and Nikolas Podraza. "Near infrared to ultraviolet optical properties of bulk single crystal and nanocrystal thin film iron pyrite."  Nanotechnology 27, 295702 (2016).
  56. Tyler Kinner, Khagendra P. Bhandari, Ebin Bastola, Bradley M. Monahan, Neale O. Haugen, Paul J. Roland, Terry P. Bigioni and Randy J. Ellingson. "Majority Carrier Type Control of Cobalt Iron Sulfide (CoxFe1-xS2) Pyrite Nanocrystals."  J. Phys. Chem. C (2016) DOI: 10.1021/acs.jpcc.5b11204.
  57. Paul J. Roland, Khagendra P. Bhandari, Randy J. Ellingson. "Influence of interparticle electronic coupling on the temperature and size dependent optical properties of lead sulfide quantum dot thin films."  J. Appl. Phys. 119, 094307 (2016).
  58. Zhaoning Song, Suneth C. Watthage, Adam B. Phillips, Brandon L. Tompkins, Randy J. Ellingson, and Michael J. Heben.  "Impact of processing temperature and composition on the formation of methylammonium lead iodide perovskites."  Chemistry of Materials, 27, 4612-4619 (2015).
  59. Khagendra P. Bhandari, Prakash Koirala, Naba R. Paudel, Rajendra R. Khanal, Adam B. Phillips, Yanfa Yan, Robert W. Collins, Michael J. Heben, and Randy J. Ellingson.  "Iron pyrite nanocrystal film serves as a copper-free back contact for polycrystalline CdTe thin film solar cells."  Solar Energy Materials and Solar Cells 117, 108-114 (2015).
  60. Khagendra P. Bhandari, Jennifer M. Collier, Randy J. Ellingson, and Defne S. Apul.  "Energy payback time (EPBT) and energy return on energy invested (EROI) of solar photovoltaic systems: A systematic review and meta-analysis.Renewable and Sustainable Energy Reviews 47, 133-141 (2015).
  61. K. P. Bhandari, P. J. Roland, T. Kinner,a Y. Cao, H. Choi, S. Jeong, and R. J. Ellingson.  "Analysis and characterization of iron pyrite nanocrystals and nanocrystalline thin films derived from bromide anion synthesis."   J. Mat. Chem. A 3, 6853-6861 (2015).  [ DOI: 10.1039/c4ta06320a ]
  62. N. O. Haugen, A. B. Phillips, T. E. Dykstra, S. Watthage, M. J. Heben, and R. J. Ellingson.  "Intraexciton Transitions in SWNT Films and Solutions Revealed by Doping Control."  J. Phys. Chem. C, vol. 118, 25253-25260 (2014).  [ DOI: 10.1021/jp507653j ]
  63. Khagendra P. Bhandari, Hyekyoung Choi, Sohee Jeong, Hasitha Mahabaduge, and Randy J. Ellingson. "Determination of heterojunction band offsets between CdS bulk and PbS quantum dots using photoelectron spectroscopy."  Appl. Phys. Lett. 105, 131604 (2014).
  64. P. J. Roland, N. R. Paudel, C. Xiao, Y. Yan, and R. J. Ellingson. "Photoluminescence spectroscopy of Cadmium Telluride deep defects."  40th IEEE Photovoltaic Specialists Conference (PVSC), 3266-3271 (2014).
  65. K. P. Bhandari, R. R. Khanal, N. R. Paudel, P. Koirala, P. J. Roland, T. Kinner, Y. Yan, R. W. Collins, M. J. Heben, and R. J. Ellingson.  "Performance of nanocrystalline iron pyrite as the back contact to CdS/CdTe solar cells."  40th IEEE Photovoltaic Specialists Conference (PVSC), 2293-2298 (2014).
  66. Y. Dai, S. Polly, S. Hellström, K. Driscoll, D. V. Forbes, S. M. Hubbard, P. J. Roland, and R. J. Ellingson. "Effects of electric field on thermal and tunneling carrier escape in InAs/GaAs quantum dot solar cells." In SPIE OPTO, pp. 898106-898106. International Society for Optics and Photonics (2014).
  67. N. R. Paudel, M. Young, P. J. Roland, R. J. Ellingson, Y. Yan, and A. D. Compaan, "Post-deposition processing options for high-efficiency sputtered CdS/CdTe solar cells."  J. Appl. Phys., vol 115, 064502 (2014).

    2008 - 2013

  68. A. B. Phillips, R. R. Khanal, Z. Song, R. M. Zartman, J. L. DeWitt, J. M. Stone, P. J. Roland, V. V. Plotnikov, C. W. Carter, J. M. Stayancho, R. J. Ellingson, A. D. Compaan, M. J. Heben, "Wiring-up carbon single wall nanotubes to polycrystalline inorganic semiconductor thin films: low-barrier, copper-free back contact to CdTe solar cells." Nano Letters, vol. 13, no. 11, 5224-5232 (2013).
  69. K. P. Bhandari, P. J. Roland, H. Mahabaduge, N. O. Haugen, C. R. Grice, S. Jeong, T. Dykstra, J. Gao, and R. J. Ellingson, "Thin film solar cells based on the heterojunction of colloidal PbS quantum dots with CdS." Solar Energy Materials and Solar Cells, vol. 117, 476-482 (2013).
  70. J. Gao, C. L. Perkins, J. M. Luther, M. C. Hanna, H. Chen, O. E. Semonin, A. J. Nozik, R. J. Ellingson, and M. C. Beard., n-Type Transition Metal Oxide as a Hole Extraction Layer in PbS Quantum Dot Solar Cells Nano Letters, vol. 11, no. 8, pp 3263–3266 (2011).
  71. J. Gao, J. M. Luther, O. E. Semonin, R. J. Ellingson, A. J. Nozik, M. C. Beard., “Quantum Dot Size Dependent J-V Characteristics in Heterojunction ZnO/PbS Quantum Dot Solar Cells.” Nano Letters, vol. 11, no. 3, 1002-1008 (2011).
  72. A. J. Nozik, M. C. Beard, J. M. Luther, M. Law, R. J. Ellingson, and J. C. Johnson "Semiconductor Quantum Dots and Quantum Dot Arrays and Applications of Multiple Exciton Generation to Third-Generation Photovoltaic Solar Cells," Chemical Reviews, vol. 110, no. 11, 6873–6890 (2010).
  73. Beard, M. C., Midgett, A. G., Law, M., Semonin, O. E., Ellingson, R. J., Nozik, A. J., “Variations in the Quantum Efficiency of Multiple Exciton Generation for a Series of Chemically Treated PbSe Nanocrystal Films” Nano Letters 9, 836-845 (2009).
  74. Beard, M. C. and Ellingson, R. J., “Multiple exciton generation in semiconductor nanocrystals: Toward efficient solar energy conversion” Laser & Photonics Review 2, 377-399 (2008).
  75. Luther, J. M., Law, M., Beard, M. C., Song, Q., Reese, M. O., Ellingson, R. J., Nozik, A. J., “Schottky Solar Cells Based on Colloidal Nanocrystal Films” Nano Letters 8, 3488-3492 (2008).
  76. Ellingson, R. J., “Solar cells: Slicing and dicing photons” Nature Photonics 2, 72-73 (2008).

  77.  

    2001 - 2007

  78. Ai, X., Xu, Q., Jones, M., Song, Q., Ding, S.-Y., Ellingson, R. J., Himmel, M., Rumbles, G., “Photophysics of (CdSe)ZnS colloidal quantum dots in an aqueous environment stabilized with amino acids and genetically-modified proteins” Photochemical & Photobiological Sciences 6, 1027-1033 (2007).
  79. Beard, M. C., Knutsen, K. P., Yu, P., Luther, J. M., Sing, Q., Metzger, W. K., Ellingson, R. J., Nozik, A. J., “Multiple exciton generation in colloidal silicon nanocrystals” Nano Letters 7, 2506-2512 (2007).
  80. Luther, J. M., Beard, M. C., Song, Q., Law, M., Ellingson, R. J., Nozik, A. J., “Multiple exciton generation in films of electronically coupled PbSe quantum dots” Nano Letters 7, 1779-1784 (2007).
  81. Jones, M., Metzger, W. K., McDonald, T. J., Engtrakul, C., Ellingson, R. J., Rumbles, G., and Heben, M. J., “Extrinsic and intrinsic effects on the excited-state kinetics of single-walled carbon nanotubes” Nano Letters 7, 300-306 (2007).
  82. Ai, X., Beard, M. C., Knutsen, K. P., Shaheen, S. E., Rumbles, G., and Ellingson, R. J., “Photoinduced charge carrier generation in a poly(3-hexylthiophene) and methanofullerene bulk heterojunction investigated by time-resolved terahertz spectroscopy” Journal of Physical Chemistry B 110, 25462 (2006).
  83. Ellingson, R. J., and Heben, M. J., “Tribute to Arthur J. Nozik” The Journal of Physical Chemistry B 110, 25125 (2006).
  84. Nozik, A. J., Ellingson, R. J., Beard, M. C., Johnson, J. C., Murphy, J., Efros, A., Shabaev, A., “Third generation solar photon conversion: multiple exciton generation in semiconductor quantum dots” Polymers and Materials: Science and Engineering 95, 161 (2006).
  85. McDonald, T. J., Jones, M., Engtrakul, C., Ellingson, R. J., Rumbles, G., and Heben, M. J., “Near-infrared Fourier transform photoluminescence spectrometer with tunable excitation for the study of single-walled carbon nanotubes” Review of Scientific Instruments 77, 053104 (2006).
  86. Murphy, J. E., Beard, M. C., Norman, A. G., Ahrenkiel, S. P., Johnson, J. C., Yu, P., Micic, O. I., Ellingson, R. J., and Nozik, A. J., “PbTe colloidal nanocrystals: Synthesis, characterization, and multiple exciton generation” Journal of the American Chemical Society 128, 3241 (2006).
  87. Ellingson, R.J., "'Optically Induced Events' and Other Art by Carolyn Ellingson." Optics and Photonics News 17, 36-41 (2006).
  88. Ellingson, R. J., Beard, M. C., Johnson, J. C., Yu, P., Micic, O. I., Nozik, A. J., Shabaev, A., Efros, Al. L., “Highly Efficient Multiple Exciton Generation in Colloidal PbSe and PbS Quantum Dots” Nano Letters 5, 865 (2005).
  89. Yu, P., Beard, M. C., Ellingson, R. J., Ferrere, S., Curtis, C., Drexler, J., Luiszer, F., and Nozik, A. J., “Absorption cross section and related optical properties of colloidal InAs quantum dots” Journal of Physical Chemistry B 109, 7084 (2005).
  90. Blackburn, J. L., Selmarten, D. C., Ellingson, R. J., Jones, M., Micic, O., Nozik, A. J., “Electron and hole transfer from indium phosphide quantum dots” Journal of Physical Chemistry B 109, 2625-2631 (2005).
  91. Jones, M., Engtrakul, C., Metzger, W. K., Ellingson, R. J., Nozik, A. J., Heben, M. J., Rumbles, G., “Analysis of photoluminescence from solubilized single-walled carbon nanotubes” Physical Review B 71, 115426 (2005).
  92. Ellingson, R. J., Engtrakul, C., Jones, M., Samec, M., Rumbles, G., Nozik, A., Heben, A., “Ultrafast photoresponse of metallic and semiconducting single wall carbon nanotubes” Physical Review B 71, 115444 (2005).
  93. Yu, P., Nedeljkovic, J. M., Ahrenkiel, P. A., Ellingson, R. J., Nozik, A. J., “Size dependent femtosecond electron cooling dynamics in CdSe quantum rods” Nano Letters 4, 1089-1092 (2004).
  94. Ellingson, R. J., Blackburn, J. L., Nedeljkovic, J., Rumbles, G., Jones, M., Fu, H., Nozik, A. J., “Experimental and theoretical investigation of electronic structure in colloidal indium phosphide quantum dots” Physics of Static Solutions 0, 1229-1232 (2003).
  95. Jones, M., Nedeljkovic, J., Ellingson, R. J., Nozik, A. J., Rumbles, G., “Photoenhancement of luminescence in colloidal CdSe quantum dot solutions” Journal of Physical Chemistry B 107, 11346-11352 (2003).
  96. Ellingson, R. J., Blackburn, J. L., Nedeljkovic, J., Rumbles, G., Jones, M., Fu, H., Nozik, A. J., “Theoretical and experimental investigation of electronic structure and relaxation of colloidal nanocrystalline indium phosphide quantum dots” Physical Review B 67, 075308/1-075308/8 (2003).
  97. Blackburn, J. L., Ellingson, R. J., Micic, O. I., Nozik, A. J., “Electron relaxation in colloidal InP quantum dots with photogenerated excitons or chemically injected electrons” Journal of Physical Chemistry B 107, 102-109 (2003).
  98. Ellingson, R. J., Blackburn, J. L., Yu, P., Rumbles, G., Micic, O. I., and Nozik, A. J., “Excitation Energy Dependent Efficiency of Charge Carrier Relaxation and Photoluminescence in Colloidal InP Quantum Dots” Journal of Physical Chemistry B 106, 7758-7765 (2002).
  99. Metzger, W. K., Wanlass, M. W., Ellingson, R. J., Ahrenkiel, R. K., and Carapella, J. J., “Auger recombination in low-band-gap n-type InGaAs” Applied Physics Letters 79(20), 3272-3274 (2001). “Additions and Corrections”
  100. Rumbles, G., Selmarten, D. C., Ellingson, R. J., Blackburn, J. L., Yu, P., Smith, B. B., Micic, O. I., Nozik, A. J., “Anomalies in the linear absorption, transient absorption, photoluminescence and photoluminescence excitation spectroscopies of colloidal InP quantum dots” Journal of Photochemistry and Photobiology A 142(2-3), 187-195 (2001).
  101. Ahrenkiel, R. K., Ellingson, R., Metzger, W., Lubyshev, D. I., Liu, W. K., “Auger recombination in heavily carbon-doped GaAs” Applied Physics Letters 78(13), 1879-1881 (2001).

  102.  

    1991 - 2000

  103. Ellingson, R. J., Asbury, J. B., Ferrere, S., Ghosh, H. N., Sprague, J. R., Lian, T., Nozik, A. J., “Sub-picosecond injection of electrons from excited [Ru(2,2'-biby-4,4'-dicarboxy)2(SCN)2] into TiO2 using transient mid-infrared spectroscopy” Zeitschrift fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics 212, 77-84 (1999).
  104. Ahrenkiel, R. K., Ellingson, R., Johnston, S., Webb, J., Carapella, J., Wanlass, M., “Recombination lifetime of InxGa1-xAs alloys used in thermophotovoltaic converters” AIP Conf. Proc. 460 (Thermophotovoltaic Generation of Electricity), 282-288 (1999).
  105. Deb, S. K., Ellingson, R., Ferrere, S., Frank, A. J., Gregg, B. A., Nozik, A. J., Park, N., Schlichthorl, G., Zaban, A., “Photochemical solar cells based on dye-sensitization of nanocrystalline TiO2” AIP Conf. Proc. 462 (NCPV Photovoltaics Program Review), 473-480 (1999).
  106. Asbury, J. B., Ellingson, R. J., Ghosh, H. N., Ferrere, S., Nozik, A. J., Lian, T., “Femtosecond IR study of excited-state relaxation and electron-injection dynamics of Ru(dcbpy)2(NCS)2 in solution and on nanocrystalline TiO2 and Al2O3 thin films” Journal of Physical Chemistry B 103(16), 3110-3119 (1999).
  107. Raymond, M. K., Magnera, Th. F., Zharov, I., West, R., Dreczewski, B., Nozik, A. J., Sprague, J. R., Ellingson, R. J., Michl, J., “Low-temperature photophysics of permethylated n-heptasilane: the borderline between excitation localization and delocalization in a conjugated chain” Appl. Fluoresc. Chem., Biol., Med., 79-99 (1999).
  108. Asbury, J. B., Ghosh, H. N., Ellingson, R. J., Ferrere, S., Nozik, A. J., Lian, T., “Femtosecond IR study of Ru(II)(SCN)2(dcbpy)2 sensitized nanocrystalline TiO2 thin films: ultrafast electron injection and relaxation dynamics” Springer Ser. Chem. Phys., 63 (Ultrafast Phenomena XI), 639-641 (1998).
  109. Ellingson, R. J., Asbury, J. B., Ferrere, S., Ghosh, H. N., Sprague, J. R., Lian, T., Nozik, A. J., “Dynamics of electron injection in nanocrystalline titanium dioxide films sensitized with [Ru(4,4'-dicarboxy-2,2'- bipyridine)2(NCS)2] by infrared transient absorption” Journal of Physical Chemistry B 102(34), 6455-6458 (1998).
  110. Ahrenkiel, R. K., Ellingson, R., Johnston, S., Wanlass, M., “Recombination lifetime of In0.53Ga0.47As as a function of doping density” Applied Physics Letters 72(26), 3470-3472 (1998).
  111. Meier, A., Ellingson, R. J., Selmarten, D., Smith, B. B., Micic, O. I., Nozik, A. J., “Charge carrier dynamics at semiconductor-liquid interfaces” Book of Abstracts, 214th ACS National Meeting, Las Vegas, NV, September 7-11 (1997).
  112. Schulz, Douglas L., Pehnt, Martin, Rose, Doug H., Urgiles, Ed, Cahill, Andrew F., Niles, David W., Jones, Kim M., Ellingson, Randy J., Curtis, Calvin J., and Ginley, David S., “CdTe Thin Films from Nanoparticle Precursors by Spray Deposition” Chem. Mater. 9, 889-900 (1997).
  113. Nozik, A. J., Smith, B. B., Micic, O. I., Ellingson, R., Thacker, B. R., Hanna, M. C., Machol, J., “Carrier dynamics and quantization effects in photoelectrochemistry” Brookhaven Natl. Lab., [Rep.] BNL (1995), (BNL 61733, Proceedings of the Nineteenth DOE Solar Photochemistry Research Conference, 1995, 25-27.
  114. Tang, C. L., Powers, P. E., Ellingson, R. J., “Broadly tunable optical parametric sources in the nanosecond to femtosecond time domain” Editor(s): Fan, Tso Yee, Chai, Bruce. OSA Proc. Adv. Solid-State Lasers, Proc. Top. Meet. (1994), 404-6.
  115. Rosenwaks, Y., Thacker, B. R., Nozik, A. J., Ellingson, R. J., Burr, K. C., Tang, C. L., “Femtosecond carrier dynamics at InP/liquid interfaces in the presence of electric fields” Springer Ser. Chem. Phys. (1994), 60 (Ultrafast Phenomena IX), 409-11.
  116. Rosenwaks,Y., Thacker, B. R., Nozik, A. J., Ellingson, R. J., Burr, K. C., and Tang, C. L., “Ultrafast photoinduced electron transfer across semiconductor-liquid interfaces in the presence of electric fields” The Journal of Physical Chemistry 98, 2739 (1994).
  117. Ellingson, R. J. and Tang, C. L., “High-power, high-repetition-rate femtosecond pulses tunable in the visible” Optics Letters 18, 438-440 (1993).
  118. Powers, P. E., Ellingson, R. J., Pelouch, W. S., and Tang, C. L., “Recent advances of the Ti:sapphire-pumped high-repetition-rate femtosecond optical parametric oscillator” Journal of the Optics Society of America B 10, 2162-2167 (1993).
  119. Ellingson, R. J. and Tang, C. L., “High-repetition-rate femtosecond pulse generation in the blue” Optics Letters 17, 343-345 (1992).
  120. Pelouch, W. S., Ellingson, R. J., Powers, P. E., Tang, C. L., Szmyd, D. M., and Nozik, A. J., “Investigation of hot-carrier relaxation in quantum well and bulk GaAs at high carrier densities” Semicond. Sci. Technol. 7, B337-B339 (1992).
  121. Pelouch, W. S., Ellingson, R. J., Powers, P. E., Tang, C. L., Szmyd, D. M., and Nozik, A. J., “Comparison of hot-carrier relaxation in quantum wells and bulk GaAs at high carrier densities” Physical Review B 45, 1450-1453 (1992).
  122. Pelouch, W. S., Ellingson, R. J., Powers, P. E., Tang, C. L., Levi, D. H., and Nozik, A. J., “Hot carrier relaxation in quantum well and bulk GaAs at high carrier densities: femtoseconds to nanoseconds” SPIE Vol. 1677, 260-271 (1992).

  123. 1985 - 1990

  124. Elliott, C. R., Prasad, J. S., Husby, A. D., Ellingson, R. J., Holtzman, J. R., and Crankshaw, D. L., “Effects of chronic ethanol consumption on male Syrian hamster hepatic, microsomal mixed-function oxidases” Alcohol 2, 17-22 (1985).