期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 37, 页码 31721-31727出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b05689
关键词
perovskite solar cells; mesoscopic; work function; boron doping; carbon electrode
资金
- National Natural Science Foundation of China [51502141, 91433203, 61474049]
- Ministry of Science and Technology of China (863) [2015AA034601]
- 111 Project [B07038]
Work function of carbon electrodes is critical in obtaining high open circuit voltage as well as high device performance for carbon-based perovsldte solar cells. Herein, we propose a novel strategy to upshift work function of carbon electrode by incorporating boron atom into graphite lattice and employ it in printable hole-conductor-free mesoscopic perovskite solar cells. The high-work-function borondoped carbon electrode facilitates hole extraction from perovskite as verified by photoluminescence. Meanwhile, the carbon electrode is endowed with an improved conductivity because of a higher graphitization carbon of boron-doped graphite. These advantages of the boron-doped carbon electrode result in a low charge transfer resistance at carbon/perovskite interface and an extended carrier recombination lifetime. Together with the merit of both high work function and conductivity, the power conversion efficiency of hole-conductor-free mesoscopic perovskite solar cells is increased from 12.4% for the pristine graphite electrode-based cells to 13.6% for the boron-doped graphite electrode-based cells with an enhanced open-circuit voltage and fill factor.
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