Journal
ADVANCED MATERIALS
Volume 29, Issue 43, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703703
Keywords
excitonic kinetics; lead halide perovskites; light-emitting diodes; nanoinclusions; oscillator strength
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Funding
- DHS-DNDO [2014-DN-077-ARI077-04]
- NSF [ECCS-1610641]
- NNSA DNN RD [LB-15-V-GammaDetMater-PD3Jf]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1610641] Funding Source: National Science Foundation
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Solution-grown films of CsPbBr3 nanocrystals imbedded in Cs4PbBr6 are incorporated as the recombination layer in light-emitting diode (LED) structures. The kinetics at high carrier density of pure (extended) CsPbBr3 and the nanoinclusion composite are measured and analyzed, indicating second-order kinetics in extended and mainly first-order kinetics in the confined CsPbBr3, respectively. Analysis of absorption strength of this all-perovskite, all-inorganic imbedded nanocrystal composite relative to pure CsPbBr3 indicates enhanced oscillator strength consistent with earlier published attribution of the sub-nanosecond exciton radiative lifetime in nanoprecipitates of CsPbBr3 in melt-grown CsBr host crystals and CsPbBr3 evaporated films.
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