Results 131 to 140 of about 314 (172)

Effect of temperature profile on the formation of CZTSe absorber layer

2020 47th IEEE Photovoltaic Specialists Conference (PVSC), 2020
Cu 2 ZnSnSe 4 thin films were deposited on glass substrates in a sequence like; Cu/Zn/Sn/Se/Cu using thermal evaporation method. To prevent the loss of materials from the surface, capping was done by depositing Cu at the top. Post deposition annealing has been carried out at 400°C with four different ramp time of 2 minutes, 4 minutes, 6 minutes and ...
Vishvas Kumar, Udai P. Singh
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Surface preparation for 10% efficient CZTSe solar cells

Progress in Photovoltaics: Research and Applications, 2020
AbstractKesterite‐based solar cells suffer from a large open‐circuit voltage deficit, which largely arises from carrier recombination at the buffer interface. In this study, we compare two strategies to passivate the absorber surface in order to fabricate devices with power conversion efficiency higher than 10% and an open‐circuit voltage deficit as ...
Grenet, Louis, Emieux, Fabrice, Choubrac, Léo, Márquez, José, de Vito, Eric, Roux, Frédéric, Unold, Thomas   +6 more
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Optimization of selenization parameters for fabrication of CZTSe thin film

Superlattices and Microstructures, 2020
Abstract For the formation of CZTSe films, selenization time and temperature play a crucial role in a material synthesis which in turn highly affects the properties of the films. In this work, Cu, Zn, Sn and Se were thermally-deposited sequentially on Mo coated soda-lime glass (SLG) substrates.
Vishvas Kumar, Alapan Dutta, Udai P. Singh   +2 more
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The impact of sodium on the sub-bandgap states in CZTSe and CZTS

Applied Physics Letters, 2015
We compare the optically active sub-bandgap states in polycrystalline Cu2ZnSnSe4 (CZTSe) and Cu2ZnSnS4 (CZTS) thin films as a function of sodium content. In all samples studied, we find that CZTSe has a lower concentration of radiative defect-derived states compared to CZTS and that the states are also shallower in CZTSe compared to CZTS.
By Talia Gershon, Yun Seog Lee, Ravin Mankad, Oki Gunawan, Tayfun Gokmen, Doug Bishop, Brian McCandless, Supratik Guha   +7 more
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Hydrazine-Processed Ge-Substituted CZTSe Solar Cells

Chemistry of Materials, 2012
The p-type Cu2ZnSn(SxSe1–x)4 (with x ≈ 0; CZTSe) thin-film solar cell absorber, made from earth-abundant elements, was substituted with Ge using a hydrazine-based mixed particle-solution approach f...
Santanu Bag, Oki Gunawan, Tayfun Gokmen, Yu Zhu, David B. Mitzi   +4 more
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Electrical characterization and modeling of Cu2ZnSnSe4 (CZTSe) thin film

2015
p.
Oueslati, Souhaib, Touwayar, Oualid
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Junction formation and interface effects in CZTSe solar cells

2014 IEEE 40th Photovoltaic Specialist Conference (PVSC), 2014
The space charge distribution across the CZTSe/CdS heterojunction plays an important role in defining the recombination properties of Kesterite solar cells. We have conducted a study designed to manipulate the shape of the space charge region and trigger changes in the magnitude of interface recombination present in our devices.
Brion Bob, Jian V. Li, Carolyn Beall, Jeff Carapella, Clay Dehart, Yang Yang, Ingrid L. Repins   +6 more
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Study of Variation of Zn:Sn in Organically Synthesized Chalcopyrites of CZTSe

2013
Liquid processed, single-phase, highly crystalline quaternary alloy of CZTSe comprising of earth-abundant and non-toxic elements Zn & Sn can be synthesized by using non-vacuum hot-injection method through careful tuning of the precursor ratios of Zn & Sn without resorting to post-synthesis selenization or high temperature methods.
Chawla, P., Srivastava, A.K., Kharkwal, A., Singh, A.K., Sharma, S.N.   +4 more
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Effect of selenization temperature on the formation of CZTSe absorber layer

Applied Physics A, 2019
Cu2ZnSnSe4 (CZTSe) thin-films were deposited on soda-lime glass (SLG) and Mo/SLG substrate by the thermal evaporation method. The deposition was followed by two-step annealing in Se atmosphere. It was found that the selenization temperature significantly affects the phase, surface morphology, optical properties and electrical properties of the films ...
Vishvas Kumar, Udai P. Singh
openaire   +1 more source

High quality sustainable Cu₂ZnSnSe₄ (CZTSe) absorber layers in highly efficient CZTSe solar cells

Green Chemistry, 2017
An evaporation-processed Cu2ZnSnSe4 thin film solar cell with a conversion efficiency of 7.18% was facilely fabricated in an environmentally benign selenium atmosphere.
Fang-I Lai, Jui-Fu Yang, Yu-Ling Wei, Shou-Yi Kuo   +3 more
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