Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 47, Pages 14893-14897Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201708434
Keywords
2D structures; 2D homologous perovskites; self-doping; ultrathin
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Funding
- National Natural Science Foundation of China [91622117, 51472097]
- National Key Research and Development Program of Strategic Advanced Electronic Materials [2016YFB0401100]
- National Basic Research Foundation of China [2015CB932600]
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Two-dimensional (2D) homologous perovskites are arousing intense interest in photovoltaics and light-emitting fields, attributing to significantly improved stability and increasing optoelectronic performance. However, investigations on 2D homologous perovskites with ultrathin thickness and large lateral dimension have been seldom reported, being mainly hindered by challenges in synthesis. A generalized self-doping directed synthesis of ultrathin 2D homologous (BA)(2)(MA)(n-1)PbnBr3n+1 (1<) perovskites uses 2D (BA)(2)PbBr4 perovskites as the template with MA(+) dopant. Ultrathin (BA)(2)(MA)(n-1)PbnBr3n+1 perovskites are formed via an intercalation-merging mechanism, with thickness shrinking down to 4.2nm and the lateral dimension to 57m. The ultrathin 2D homologous (BA)(2)(MA)(n-1)PbnBr3n+1 perovskites are potential materials for photodetectors with promising photoresponse and stability.
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