Imbedded Nanocrystals of CsPbBr 3  in Cs 4 PbBr 6 : Kinetics, Enhanced Oscillator Strength, and Application in Light‐Emitting Diodes | Zendy

Xu Junwei | Zendy; Huang Wenxiao | Zendy; Li Peiyun | Zendy; Onken Drew R. | Zendy; Dun Chaochao | Zendy; Guo Yang | Zendy; Ucer Kamil B. | Zendy; Lu Chang | Zendy; Wang Hongzhi | Zendy; Geyer Scott M. | Zendy; Williams Richard T. | Zendy; Carroll David L. | Zendy

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Imbedded Nanocrystals of CsPbBr 3 in Cs 4 PbBr 6 : Kinetics, Enhanced Oscillator Strength, and Application in Light‐Emitting Diodes

Author(s) -

Xu Junwei,

Huang Wenxiao,

Li Peiyun,

Onken Drew R.,

Dun Chaochao,

Guo Yang,

Ucer Kamil B.,

Lu Chang,

Wang Hongzhi,

Geyer Scott M.,

Williams Richard T.,

Carroll David L.

Publication year - 2017

Publication title -

advanced materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.201703703

Subject(s) - materials science , nanocrystal , perovskite (structure) , kinetics , oscillator strength , exciton , diode , nanosecond , composite number , optoelectronics , laser , optics , nanotechnology , crystallography , composite material , condensed matter physics , chemistry , physics , quantum mechanics , astronomy , spectral line

Solution‐grown films of CsPbBr 3 nanocrystals imbedded in Cs 4 PbBr 6 are incorporated as the recombination layer in light‐emitting diode (LED) structures. The kinetics at high carrier density of pure (extended) CsPbBr 3 and the nanoinclusion composite are measured and analyzed, indicating second‐order kinetics in extended and mainly first‐order kinetics in the confined CsPbBr 3 , respectively. Analysis of absorption strength of this all‐perovskite, all‐inorganic imbedded nanocrystal composite relative to pure CsPbBr 3 indicates enhanced oscillator strength consistent with earlier published attribution of the sub‐nanosecond exciton radiative lifetime in nanoprecipitates of CsPbBr 3 in melt‐grown CsBr host crystals and CsPbBr 3 evaporated films.

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