期刊
ADVANCED MATERIALS INTERFACES
卷 6, 期 22, 页码 -出版社
WILEY
DOI: 10.1002/admi.201901372
关键词
CuGaO2; CuSCN; long-term stability; perovskite solar cells
资金
- Korea Institute of Energy Technology Evaluation and Planning [KETEP: 20183010014470]
Herein, solution-processible inorganic hole-transport layer (HTL) of a perovskite solar cell that consists of CuGaO2 nanoparticles and CuSCN, which leads to an improved device performance as well as long-term stability, is reported. Uniform films of CuGaO2 are prepared by first treating CuGaO2 nanoparticles with aminosilane that leads to well-dispersed CuGaO2 solution, followed by spin-coating of the suspension. Subsequent spin-coating of CuSCN solution onto the CuGaO2 forms a smooth HTL with excellent coverage and electrical conductivity. Comparing to the reference device with CuSCN HTL, the CuGaO2/CuSCN device improves carrier extraction and reduces trap density by approximate to 40%, as measured by photoluminescence and capacitance analysis. Excellent thermal stability is also demonstrated: approximate to 80% of the initial efficiency of the perovskite solar cells with the CuGaO2/CuSCN HTL is retained after 400 h under 85 degrees C/85% relative humidity environment.
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