期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 31, 页码 17482-17488出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b05104
关键词
CuInS2; quantum dots; hole-transporting materials; perovskite solar cells; interface recombination
资金
- National Basic Research Program of China [2011CBA00700]
- National Natural Science Foundation of China [21403247, 61204075]
To develop novel hole-transporting materials (HTMs) is an important issue of perovskite solar cells (PSCs), especially favoring the stability improvement and the cost reduction. Herein, we use ternary quantum dots (QDs) as HTM in mesoporous TiO2/CH3NH3PbI3/HTM/Au solar cell, and modify the surface of CuInS2 QDs by cation exchange to improve the carrier transport. The device efficiency using CuInS2 QDs with a ZnS shell layer as HTM is 8.38% under AM 1.5, 100 mW cm(-2). The electrochemical impedance spectroscopy suggested that the significantly enhanced performance is mainly attributed to the reduced charge recombination between TiO2 and HTM. It paves a new pathway for the future development of cheap inorganic HTMs for the high efficiency PSCs.
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