Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 37, Pages 34109-34116Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b11665
Keywords
perovskite; Mn-doping; light-emitting diode; two-dimensional; high luminescence; high stability
Funding
- Foundation of Hebei Education Department [BJ2019027]
- Natural Science Foundation of Hebei Province [F2018202046]
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment [EERIZZ2018003]
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Lead halide perovskites are emerging as promising candidates for high-efficiency light-emitting diode (LED) applications because of their tunable band gaps and high quantum yield (QY). However, it remains a challenge to obtain stable red emitting materials with high QY. Herein, we report a facile and convenient hot-injection strategy to synthesize Mn-doped two-dimensional (2D) perovskite nanosheets. The emission peak can be tuned from 597 to 6S8 nm by manipulating the crystal field strength. In particular, a QY as high as 97% for 2D perovskite is achieved. The as-prepared perovskite also possesses excellent stability, whose emission property can be maintained for almost one year. A monochrome LED is further fabricated by employing the as-prepared perovskite as phosphor, which also shows high long-term stability. We believe that these highly efficient and stable perovskites will open up new opportunities in LED applications.
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