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Solution-processed Cu2ZnSnS4 absorbers prepared by appropriate inclusion and removal of thiourea for thin film solar cells

Title
Solution-processed Cu2ZnSnS4 absorbers prepared by appropriate inclusion and removal of thiourea for thin film solar cells
Authors
Park, SN[Park, Si-Nae]Sung, SJ[Sung, Shi-Joon]Son, DH[Son, Dae-Ho]Kim, DH[Kim, Dae-Hwan]Gansukh, M[Gansukh, Mungunshagai]Cheong, H[Cheong, Hyeonsik]Kang, JK[Kang, Jin-Kyu]
DGIST Authors
Park, SN[Park, Si-Nae]; Son, DH[Son, Dae-Ho]; Kim, DH[Kim, Dae-Hwan]; Kang, JK[Kang, Jin-Kyu]
Issue Date
2014
Citation
RSC Advances, 4(18), 9118-9125
Type
Article
Article Type
Article
ISSN
2046-2069
Abstract
We studied how to effectively add/remove organic chemicals to/from CZTS precursor thin films to prepare uniform CZTS thin films that show optimal properties. We used multi-functional thiourea, as both a stabiliser and a source of sulphur, to prepare the precursor solutions. This is because it forms complexes with metal chlorides, which stabilise the CZTS precursor solutions and enable CZTS thin films to be spin-coated onto substrates thereby enabling fabrication of CZTS absorbers. However, the excess thiourea, required to stabilise the CZTS precursor solutions, induced the formation of a ZnS secondary phase in the CZTS thin films, which deteriorated the photovoltaic properties of the CZTS solar cells. We therefore pre-annealed the thin films to inhibit ZnS formation. We used the thiourea-stabilized CZTS precursor solutions and simple solution processing techniques to prepare CZTS precursor thin films, and optimized the pre-annealing temperature to fabricate CZTS solar cells that showed 5.29% efficiency. © 2014 The Royal Society of Chemistry.
URI
http://hdl.handle.net/20.500.11750/2410
DOI
10.1039/c3ra45441j
Publisher
Royal Society of Chemistry
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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