Results 161 to 170 of about 866 (198)

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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Influence of copper composition and reaction temperature on the properties of CZTSe thin films [PDF]

Journal of Alloys and Compounds, 2016
In this study Cu2ZnSnSe4 (CZTSe) compound layers were grown using a two-stage technique that involved deposition of metallic precursors (Cu, Zn, and Sn) and Se in the first stage, followed by reaction of all the species at temperatures between 525 °C and
Mehmet Ali Olgar, Y Atasoy, Bulent M Basol   +2 more
exaly   +3 more sources

Formation of CZTSSe absorber layer using thiourea treatment of CZTSe

Materials Today: Proceedings, 2021
Abstract In the present work, CZTSe (Cu2ZnSnSe4) films were deposited by Thermal evaporation technique. The as deposited films were annealed at 450 °C for 10 min. To incorporate Sulfur in the CZTSe film and to replace some of the Se by S, the films (as deposited and annealed) were treated with Thiourea solution (1 Molar).
Vishvas kumar, Udai P. Singh
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Electrical characterization and modeling of Cu2ZnSnSe4 (CZTSe) thin film

2015
p.
Oueslati, Souhaib, Touwayar, Oualid
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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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Improving device performance of sputtered CZTSe based solar cells by Manganese doping [PDF]

Optical Materials
Despite many efforts, Cu2ZnSnSe4 (CZTSe) based solar cells have remained relatively low efficiency compared to other thin film-based devices. One of the prevalent strategies used to improve cell performance in CZTSe is cation substitution.
Yavuz Atasoy, Bulent M Basol
exaly   +3 more sources

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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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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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
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