期刊
ADVANCED ENERGY MATERIALS
卷 8, 期 13, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201702762
关键词
CuCrO2; low-temperature solution process; perovskite solar cells; photostability; p-type semiconductors
类别
资金
- National Natural Science Foundation [51672094, 51661135023]
- National Key R&D Program of China [2016YFC0205002]
- Self-determined and Innovative Research Funds of Huazhong University of Science and Technology (HUST) [2016JCTD111]
- National Science Foundation [DMR-1608279]
- Office of Naval Research [N00014-17-1-2260]
- Hong Kong Research Grants Council (HK-RGC) General Research Funds (GRF) [16312216]
- HK Innovation Technology Funds [ITS/219/16]
Organic-inorganic hybrid perovskite solar cells (PVSCs) have become the front-running photovoltaic technology nowadays and are expected to profoundly impact society in the near future. However, their practical applications are currently hampered by the challenges of realizing high performance and long-term stability simultaneously. Herein, the development of inverted PVSCs is reported based on low temperature solution-processed CuCrO2 nanocrystals as a hole-transporting layer (HTL), to replace the extensively studied NiOx counterpart due to its suitable electronic structure and charge carrier transporting properties. A approximate to 45 nm thick compact CuCrO2 layer is incorporated into an inverted planar configuration of indium tin oxides (ITO)/c-CuCrO2/perovskite/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/bathocuproine (BCP)/Ag, to result in the high steady-state power conversion efficiency of 19.0% versus 17.1% for the typical low temperature solution-processed NiOx-based devices. More importantly, the optimized CuCrO2-based device exhibits a much enhanced photostability than the reference device due to the greater UV light-harvesting of the CuCrO2 layer, which can efficiently prevent the perovskite film from intense UV light exposure to avoid associated degradation. The results demonstrate the promising potential of CuCrO2 nanocrystals as an efficient HTL for realizing high-performance and photostable inverted PVSCs.
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