Cited 11 time in webofscience Cited 13 time in scopus

Solar conversion efficiency and distribution of ZnS secondary phase in Cu2ZnSnS4 solar cells

Title
Solar conversion efficiency and distribution of ZnS secondary phase in Cu2ZnSnS4 solar cells
Authors
Nam, DahyunCho, SoyeonSim, Jun-HyoungYang, Kee-JeongSon, Dae-HoKim, Dae-HwanKang, Jin-KyuKwon, Min-SuJeon, Chan-WookCheong, Hyeonsik
DGIST Authors
Yang, Kee-JeongKim, Dae-HwanKang, Jin-Kyu
Issue Date
2016-05
Citation
Solar Energy Materials and Solar Cells, 149, 226-231
Type
Article
Article Type
Article
Keywords
Conversion EfficiencyCopper-Zinc-Tin SulfideCopper Zinc Tin SulfidesCZTS Solar CellsEfficiencyFilm PreparationHigher EfficiencyMolybdenum CompoundsMoS2Raman SpectroscopySecondary PhaseSolar CellsSolar Conversion EfficienciesSputtered PrecursorsSulfurization TemperatureThin-FilmsTwo-Step ProcessZincZinc SulfideZnS
ISSN
0927-0248
Abstract
We found a clear correlation between the solar conversion efficiency and the distribution of the ZnS secondary phase in Cu2ZnSnS4 (CZTS) solar cells. Five CZTS solar cells were prepared by the two-step process in which sputtered precursor multilayers were sulfurized at different temperatures. In higher efficiency solar cells, the ZnS secondary phase was found to accumulate near the interface between CZTS and MoS2 formed on top of the Mo layer. It was also found that a solar cell with a higher efficiency showed weaker ZnS Raman signal in the MoS2 layer. The highest conversion efficiency of 7.5% was obtained from a solar cell prepared at a sulfurization temperature of 570 °C, in which no ZnS was detected in the MoS2 layer. We suggest that in order to obtain a high efficiency CZTS solar cell, it is critical to find a condition that keeps ZnS from the MoS2 layer. © 2016 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5108
DOI
10.1016/j.solmat.2016.01.025
Publisher
Elsevier B.V.
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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