期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 124, 期 11, 页码 6022-6027出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.0c01324
关键词
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资金
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) [DE-SC0010689]
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- U.S. Department of Energy (DOE) [DE-SC0010689] Funding Source: U.S. Department of Energy (DOE)
The notion of defect tolerance has often been invoked to explain the excellent performance of halide perovskites in optoelectronic applications. However, this concept has not been rigorously defined or assessed. A common interpretation is that all of the energetically favorable intrinsic defects are shallow. On the basis of examples in the prototypical halide perovskite CsPbI3, we show that this is not the case. The antisite defects Pb-1 and I(Pb )are energetically favorable, but also have levels deep in the band gap. Still, because of strong anharmonicity, they are not efficient nonradiative recombination centers. Our study demonstrates how to correctly evaluate the defect tolerance of halide perovskites.
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