期刊
NANO LETTERS
卷 18, 期 4, 页码 2442-2449出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b00025
关键词
Electron transporting; perovskite solar cell; graphene; van der Waals interaction; interface engineering
类别
资金
- 973 Program of China [2014CB643506]
- Major International (Regional) Joint Research Project NSFC-SNSF [51661135023]
- Natural Science Foundation of China [21673091]
- Natural Science Foundation of Hubei Province [ZRZ2015000203]
- Technology Creative Project of Excellent Middle & Young Team of Hubei Province [T201511]
- Air Force Office of Scientific Research [FA9550-15-1-0333]
- UC-Solar Institute [MR-15-328386]
Organic-inorganic hybrid lead halide perovskites have been widely investigated in optoelectronics both experimentally and theoretically. The present work incorporates chemically modified graphene into nanocrystal SnO2 as the electron transporting layer (ETL) for highly efficient planar perovskite solar cells. The modification of SnO2 with highly conductive two-dimensional naphthalene diimide-graphene can increase surface hydrophobicity and form van der Waals interaction between the surfactant and the organic-inorganic hybrid lead halide perovskite compounds. As a result, highly efficient perovskite solar cells with power conversion efficiency of 20.2% can be achieved with an improved fill factor of 82%, which could be mainly attributed to the augmented charge extraction and transport.
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