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A modeling study on utilizing SnS2 as the buffer layer of CZT(S, Se) solar cells

Title
A modeling study on utilizing SnS2 as the buffer layer of CZT(S, Se) solar cells
Authors
Haghighi, MaryamMinbashi, MehranTaghavinia, NimaKim, Dae-HwanMahdavi, Seyed MohammadKordbacheh, Amirhossein Ahmadkhan
DGIST Authors
Kim, Dae-Hwan
Issue Date
2018-06
Citation
Solar Energy, 167, 165-171
Type
Article
Article Type
Article
Author Keyword
CZT(S, Se) solar cell; Buffer layer; SnS2; SCAPS software; Pulsed laser deposition (PLD); Electron transport layer (ETL)
Keyword
THIN-FILM; EFFICIENCY; PHOTOCATALYSTS; RECOMBINATION; NANOCRYSTALS; ENHANCEMENT; PERFORMANCE; GENERATION; DEPOSITION; CONTACT
ISSN
0038-092X
Abstract
CdS is conventionally used as the n-type buffer layer in chalcopyrite (CIG(S, Se)) and Kesterite (CZT(S, Se)) solar cells. CdS is toxic and there are wide attempts to find substitutes for it. Here, we suggest SnS2 as a possible alternative. SnS2 films were deposited by pulsed laser deposition (PLD), characterized to estimate carrier concentration and electron affinity values, and the obtained values were used to model a CZT(S, Se) solar cell. The experimental values of a benchmark CZT(S, Se) cell with efficiency of 12.3% were employed to obtain the density and energy position of defects in CZT(S, Se) and validating the model. We observed that SnS2 results in almost identical performance as CdS, showing slightly better current density, due to smaller conduction band offset of 0.21 eV compared to 0.28 eV for CdS. © 2018 Elsevier Ltd
URI
http://hdl.handle.net/20.500.11750/6259
DOI
10.1016/j.solener.2018.04.010
Publisher
Elsevier Ltd
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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