Aminosilane-Modified CuGaO2 Nanoparticles Incorporated with CuSCN as a Hole-Transport Layer for Efficient and Stable Perovskite Solar Cells

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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.
Publisher
WILEY
Issue Date
2019-11
Language
English
Article Type
Article
Citation

ADVANCED MATERIALS INTERFACES, v.6, no.22, pp.1901372

ISSN
2196-7350
DOI
10.1002/admi.201901372
URI
http://hdl.handle.net/10203/270031
Appears in Collection
MS-Journal Papers(저널논문)
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