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Fabrication of antimony chalcohalides via two-step solution processing and application to solar cells

Title
Fabrication of antimony chalcohalides via two-step solution processing and application to solar cells
Authors
Choi, Yong Chan
DGIST Authors
Choi, Yong Chan
Issue Date
2018-03-27
Citation
European Advanced Energy Materials and Technology Congress 2018
Type
Conference
Abstract
Despite of remarkable contribution of organic-inorganic hybrid perovskite materials to high-performance next-generation solar cell field, tremendous efforts have recently dedicated to explore alternative photovoltaic materials because of critical problems that have faced in perovskite photovoltaic systems, such as instability, toxicity, and interfacial issues. Antimony/bismuth chalcohalides, such as SbSI, SbSBr, and BiSI, have been considered as one of emerging light absorbers because of ns2 electronic configuration of antimony/bismuth, giving one key property as defect-tolerant solar absorbers.1 In this talk, we introduce a simple solution processing for the fabrication of antimony sulfoiodide SbSI and application to heterojunction solar cells. The SbSI is fabricated by two-step solution processing. This method involves, first, the formation of amorphous Sb2S3 (am-Sb2S3), fabricated by SbCl3-thiourea complex solution processing,2 and, second, the conversion from amSb2S3 to SbSI, by spin-coating the SbI3 solution and subsequent drying at moderate temperatures. By using this method, not only the complete formation of SbSI is achieved at low temperature of < 250 ºC, but also the intensity of SbSI phase can be easily controlled. Here we will discuss the correlation of fabrication parameters with photovoltaic performances. This talk may give some clues for further developments of next-generation solar cells and enlightens us to find proper cost-effect solution methods and potential absorbers.
URI
http://hdl.handle.net/20.500.11750/6182
Publisher
International Association of Advanced Materials
Related Researcher
  • Author Choi, Yong Chan  
  • Research Interests Solar Cells; Chalcohalides; chalcohalides; sulfides; selenides
Files:
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Collection:
Convergence Research Center for Solar Energy2. Conference Papers


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