Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Khagendra P. Bhandari"'
Autor:
Khagendra P. Bhandari, Dhurba R. Sapkota, Manoj K. Jamarkattel, Quenton Stillion, Robert W. Collins
Publikováno v:
Nanomaterials, Vol 13, Iss 11, p 1795 (2023)
Zinc oxide (ZnO) nanoparticles have shown great potential because of their versatile and promising applications in different fields, including solar cells. Various methods of synthesizing ZnO materials have been reported. In this work, controlled syn
Externí odkaz:
https://doaj.org/article/62cd9e35ec9440f2a498a781a88b1f88
Autor:
Collins, Khagendra P. Bhandari, Dhurba R. Sapkota, Manoj K. Jamarkattel, Quenton Stillion, Robert W.
Publikováno v:
Nanomaterials; Volume 13; Issue 11; Pages: 1795
Zinc oxide (ZnO) nanoparticles have shown great potential because of their versatile and promising applications in different fields, including solar cells. Various methods of synthesizing ZnO materials have been reported. In this work, controlled syn
Autor:
Randy J. Ellingson, Fadhil K. Alfadhili, Michael J. Heben, Khagendra P. Bhandari, Ebin Bastola, Adam J. Phillips, Geethika K. Liyanage, Suneth C. Watthage, Zhaoning Song
Publikováno v:
Progress in Photovoltaics: Research and Applications. 28:1024-1033
Autor:
Khagendra P. Bhandari
Publikováno v:
Optics
Volume 1
Issue 1
Pages 2-31
Volume 1
Issue 1
Pages 2-31
The optical reflectance spectra of alkali halide crystals KI and RbI were measured over the energy range of 4.14 to 6.91 eV. Both single crystal and poly-crystal samples were used to accomplish this task. The phase θ ( ω ) was computed using the Kr
Autor:
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, Nikolas J. Podraza
Publikováno v:
Materials, Vol 11, Iss 1, p 145 (2018)
Real time spectroscopic ellipsometry (RTSE) has been applied for in-situ monitoring of the first stage of copper indium-gallium diselenide (CIGS) thin film deposition by the three-stage co-evaporation process used for fabrication of high efficiency t
Externí odkaz:
https://doaj.org/article/db309d8b3f814c638c2360c60de83e97
Autor:
Zhaoning Song, Randy J. Ellingson, Adam B. Phillips, Michael J. Heben, Nikolas J. Podraza, Indra Subedi, Ebin Bastola, Kamala Khanal Subedi, Khagendra P. Bhandari
Publikováno v:
Solar Energy Materials and Solar Cells. 186:227-235
Critical avenues to increase energy yield for CdTe photovoltaic (PV) technology, such as bifacial cells or tandem cells designs, rely on the need to develop transparent back contact approaches that enable high efficiency and high transparency. We rep
Publikováno v:
MRS Communications. 8:970-978
Here, we report thiol-free thermal-injection synthesis of chalcopyrite (CuFeS2) nanocrystals (NCs) using iron (II) bromide (FeBr2), copper (II) acetaylacetonate (Cu(acac)2), and elemental sulfur (S). Controlled reaction temperature and growth time yi
Autor:
Jacob M. Gibbs, Adam B. Phillips, Michael J. Heben, Khagendra P. Bhandari, Randy J. Ellingson, Zhaoning Song, Geethika K. Liyanage, Fadhil K. Alfadhili, Rabee B. Alkhayat, Suneth C. Watthage, Ramez Hosseinian Ahangharnejhad, Zahrah S. Almutawah
Publikováno v:
IEEE Journal of Photovoltaics. 8:1125-1131
The presence of a Te-rich surface or an elemental Te layer is beneficial for the formation of a low-barrier back contact for high-efficiency CdTe solar cells. Etching processes are widely used to form Te-rich CdTe surfaces, while deposition processes
Publikováno v:
MRS Advances. 3:2441-2447
The cadmium telluride (CdTe) photovoltaic (PV) comprise an efficient and cost-effective technology for harvesting solar energy. However, device efficiency remains limited in part by low-open circuit voltage (VOC) and fill factor (FF) due to inefficie
Autor:
Xinxuan Tan, Adam B. Phillips, Michael J. Heben, Fadhil K. Alfadhili, Khagendra P. Bhandari, Peymon Zereshki, Prakash Koirala, Robert W. Collins, Randy J. Ellingson
Publikováno v:
Solar Energy Materials and Solar Cells. 163:277-284
We report the properties of hybrid deposited iron pyrite (FeS2) thin films applied as the back contact interface layers of CdS/CdTe solar cells. The hybrid deposition process for FeS2 optimized in this study relies on DC magnetron sputtering of iron