期刊
ACS ENERGY LETTERS
卷 7, 期 4, 页码 1544-1552出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c00431
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- King Abdullah University of Science and Technology (KAUST)
- College of Science of the University of Arizona
- Department of the Navy, Office of Naval Research [N00014-20-1-2110]
We synthesized two types of MAPbI3 single-crystal films with different surface orientations, and studied their performance in solar cells. The results showed that both MAPbI3(001) and (100) single-crystal films have efficient hole transfer, but differ in electron transfer and stability.
We synthesized two types of MAPbI3single-crystalfilms with dominant (001) and (100) surface orientations for solarcells. We found that both MAPbI3(001) and (100) single-crystalfilms have efficient hole transfer into poly(triaryl)amine (PTAA),as evident from the reduced photoluminescence (PL) intensity andlifetime, as well as the type-II energy alignment. Unlike a MAPbI3(100) single-crystalfilm with a strong PL quenching due toefficient electron transfer to phenyl-C61-butyric acid methyl ester(PCBM), the MAPbI3(001) single-crystalfilm exhibits an increasein PL intensity in the presence of PCBM, which can be attributedto surface passivation. Interestingly, different from the conven-tional MAPbI3(100) that suffers from a significant decrease in thePCE (from 19.3 to 14.4%), the MAPbI3(001) single-crystalfilm shows an increase in the PCE (from 16.0 to 17.2%) and muchbetter stability under ambient conditions thanks to the dual passivation on the PbI2-rich surface by PCBM and O2.
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