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Optimization of Cd2+ partial electrolyte treatment on the absorber layer for high-efficiency Cu2ZnSnSe4 solar cells

Title
Optimization of Cd2+ partial electrolyte treatment on the absorber layer for high-efficiency Cu2ZnSnSe4 solar cells
Authors
Kim, Ok-SikKwon, Jin-BeomKim, Sae-WanXu, BinruiBae, Jin-HyukSon, Dae-HoKim, Young-IllKim, Se-YunKim, Dae-HwanKang, Jin-KyuKang, Shin-Won
DGIST Authors
Kim, Ok-Sik; Kwon, Jin-Beom; Kim, Sae-Wan; Xu, Binrui; Bae, Jin-Hyuk; Son, Dae-Ho; Kim, Young-Ill; Kim, Se-Yun; Kim, Dae-HwanKang, Jin-Kyu; Kang, Shin-Won
Issue Date
2019-12
Citation
Journal of Industrial and Engineering Chemistry, 80, 122-129
Type
Article
Article Type
Article
Author Keywords
CZTSeCd2+ partial electrolyteOptimizationBuffer layerCdSThin films solar cells
Keywords
CDS
ISSN
1226-086X
Abstract
Currently, many researchers are focused on promising new energy technologies such as Cu2ZnSnS4-based solar cells to replace fossil fuel sources. Investigations into a variety of methods have been done to analyze the interfacial problems and improve the cell interfacial properties via a variety of methods. In particular, In order to improve the electrical performance of Cu2ZnSnSe4 (CZTSe) based solar cells, the Cd partial electrolyte (Cd PE) treatment that is an effective method in CIGS solar cells prior to applying their CdS buffer layer to their absorber layer has been studied. In our study, we investigated the Cd PE treatment time, the Cd PE bath temperature, and the correlation between Cd PE treatment and CdS thickness. The optimum Cd PE absorber treatment was 7 min at 70 °C, with a CdS layer of 35 nm thick deposited cells. This combination increased photo-carrier collection in the short wavelength range and reduced absorber-buffer interface recombination. The efficiency of a 35 nm buffer layer sample without PE treatment was 8.90%. The efficiency of another 35 nm buffer layer sample was 10.38% (Voc: 441 mV, Jsc: 38.15 mA/cm2, and FF: 61.58%) after Cd PE treatment due to the increase of Jsc, FF and Rs despite the deficit of Voc. © 2019
URI
http://hdl.handle.net/20.500.11750/10834
DOI
10.1016/j.jiec.2019.07.039
Publisher
Elsevier B.V
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Energy Technology1. Journal Articles


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