期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 32, 期 2, 页码 1557-1569出版社
SPRINGER
DOI: 10.1007/s10854-020-04924-0
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资金
- Research Network NANOTEC (RNN) program of the National Nanotechnology Center (NANOTEC), NSTDA, Ministry of Higher Education, Science, Research and Innovation
- Khon Kaen University, Thailand
- Center of Excellence in Physics (ThEP)
- Integrated Nanotechnology Center, Khon Kaen University
- Srinakharinwirot University [028/2564]
- National Nanotechnology Center (NANOTEC), NSTD, Ministry of Science and Technology, Thailand, through its program of Center of Excellence Network
This study focuses on the preparation of CsPbBr3 film by hot casting method and the performance of CsPbBrSCNx at different SCN- doping levels. The results indicate that certain CsPbBrSCNx films exhibit higher efficiency and stability in solar cells.
A CsPbBr3 film was prepared by the hot-casting method from a mixed CsBr and PbBr2 solution with an orthorhombic-phase (gamma) CsPbBr3 perovskite structure. gamma-CsPbBr3 film has a yellow color with a bandgap energy of 2.32 eV. The low SCN- dopant level forming CsPb(SCN)(x)Br3-x (x = 0.0625, 0.125, 0.01875, 0.25 and 0.5) films maintains an orthorhombic CsPb(SCN)(x)Br3-x structure with a film bandgap of 2.32-2.34 eV. The calculated bandgap of the optimized gamma-CsPb(SCN)(x)Br3-x structures slightly changed with SCN- dopant levels from x = 0 to x = 0.5. A carbon-based hole transport layer (HTL)-free gamma-CsPb(SCN)(0.25)Br-2.75 solar cell delivers the highest efficiency of 4.5% under six conditions compared to a carbon-based HTL-free pure gamma-CsPbBr3 solar cell with an efficiency of 3.89%. The stability of the carbon-based HTL-free gamma-CsPb(SCN)(0.25)Br-2.75 solar cell is better than that of the carbon-based HTL-free pure gamma-CsPbBr3 solar cell with efficiency retention of 88.96% and 61.86% of their initial values, respectively, after a 30-day testing period.
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