Fully stoichiometric Cu2BaSn(S1-xSex)4 solar cells via chemical solution deposition.

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ID: 87665
2020
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Abstract
Cu2BaSn(S1-x Sex)4 has shown great prospects in photoelectric field due to earth-abundance, low toxicity, cost efficiency, direct bandgap, high absorption coefficient (>104 cm-1) and reduced anti-site disorder relative to Cu2ZnSn(S1-xSex)4. Fully-tunable ratio of S/Se is the key to broaden the bandgap of Cu2BaSn(S1-xSex)4. Here, we introduce a thionothiolic acid metathesis process to readily tune stoichiometry of Cu2BaSn(S1-xSex)4 films for the first time. Different stoichiometric Se/(S+Se) of Cu2BaSn(S1-xSex)4 from 0 to 1 can vary the bandgap range from 2 to 1.68 eV. The grain size of Cu2BaSn(S1-xSex)4 films can be grown more than 10 μm. The optimized bandgap and high-quality growth of Cu2BaSn(S1-xSex)4 films ensure the best power conversion efficiency of 2.01% for solution-processed Cu2BaSn(S1-xSex)4 solar cells. This method provides an alternative solution-processed way for synthesis of fully stoichiometric Cu2BaSn(S1-xSex)4.
Reference Key
wang2020fullynanotechnology Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wang, Chen;Yi, Qinghua;Zhang, Qiang;Wang, Fumao;Zou, Guifu;
Journal Nanotechnology
Year 2020
DOI
10.1088/1361-6528/ab70fe
URL
Keywords
stoichiometry cu2basn(s1-x sex)4 solution process tunable bandgap

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