Journal
FRONTIERS OF OPTOELECTRONICS
Volume 13, Issue 3, Pages 265-271Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s12200-020-1041-z
Keywords
inorganic perovskite solar cell (PSC); holetransport material (HTM); stability
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Funding
- Beijing Municipal Science and Technology Commission [Z181100004718005, Z181100005118002]
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Cesium-based inorganic perovskite solar cells (PSCs) are paid more attention because of their potential thermal stability. However, prevalent salt-doped 2,2 ',7,7 '-tetrakis(N,N-dipmethoxyphenylamine)9,9 '-spirobifluorene (Spiro-OMeTAD) as hole-transport materials (HTMs) for a high-efficiency inorganic device has an unfortunate defective thermal stability. In this study, we apply poly (3-hexylthiophene-2,5-diyl) (P3HT) as the HTM and design all-inorganic PSCs with an indium tin oxide (ITO)/SnO2/LiF/CsPbI3-xBrx/P3HT/Au structure. As a result, the CsPbI3-xBrxPSCs achieve an excellent performance of 15.84%. The P3HT HTM-based device exhibits good photo-stability, maintaining similar to 80% of their initial power conversion efficiency over 280 h under one Sun irradiation. In addition, they also show better thermal stability compared with the traditional HTM Spiro-OMeTAD.
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