Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 28, Issue 22, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201801193
Keywords
CsPbBr3; inorganic nanocomposites; LEDs; low-dimensional perovskite; stability
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Funding
- National Key Research and Development Program of China [2016YFA0204000, 2016YFB0201204]
- National Natural Science Foundation of China [U1632118, 21571129, 11404131, 11674121]
- Shanghai key research program [16JC1402100]
- Shanghai International Cooperation Project [16520720700]
- ShanghaiTech start-up funding
- 1000 young talent program
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Metal halide perovskites are rising as a competitive material for next-generation light-emitting diodes (LEDs). However, the development of perovskite LEDs is impeded by their fast carriers diffusion and poor stability in bias condition. Herein, quasi-2D CsPbBr3 quantum wells homogeneously surrounded by inorganic crystalline Cs4PbBr6 of large bandgap are grown. The centralization of carriers in nanoregion facilitates radiative recombination and brings much enhanced luminescence quantum yield. The external quantum efficiency and luminescence intensity of the LEDs based on this nanocomposite are one order of magnitude higher than the conventional low-dimensional perovskite. Meanwhile, the use of inorganic nanocomposite materials brings much improved device operation lifetime under constant electrical field.
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