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Solution-Phase Fabrication of Chalcohalides from Chalcogenides for Solar Cell Application

Solution-Phase Fabrication of Chalcohalides from Chalcogenides for Solar Cell Application
Hwang, EunjeongChoi, Yong Chan
DGIST Authors
Choi, Yong Chan
Issue Date
The 5th International Conference on Advanced Electromaterials (ICAE 2019)
Antimony/bismuth chalcohalides, (Sb,Bi)ChX (Ch=S,Se; X=I,Br), have attracted considerable attention as alternatives to the perovskites in next-generation solar cells due to their low-toxicity, defect-tolerant feature, tunable band gap, and remarkable photovoltaic performance. However, methods available to fabricate them for solar cells are very limited. Recently, we developed a simple solution process for the fabrication of SbSI obtained by reacting amorphous Sb2S3 with SbI3. We also successfully applied this to the planar-type solar cell and obtained ~1% device efficiency [1]. Very recently, we have found that this method can be applied to the fabrication of various chalcohalides. In this work, we introduce a facile method for the fabrication of Sb(S,Se)I and (Sb,Bi)SI by modifying the previous method. To this end, the Sb2(S,Se)3 and (Sb,Bi)2S3 were first prepared by thiol-amine solution approach, and reacted with SbI3 for conversion to Sb(S,Se)I and (Sb,Bi)SI, respectively. This method enabled to control the composition, structure, morphology, and band gap at low-temperature of 200°C. This will make possible to produce various chalcohalides with desirable properties for optimal photovoltaic performance.
The Korean Institute of Electrical and Electronic Material Engineers
Related Researcher
  • Author Choi, Yong Chan Dr. Choi Group @ DGIST
  • Research Interests Solar Cells; Chalcohalides; chalcohalides; sulfides; selenides
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Division of Energy TechnologyDr. Choi Group @ DGIST2. Conference Papers
Division of Energy Technology2. Conference Papers

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