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Download fileOrange to Red, Emission-Tunable Mn-Doped Two-Dimensional Perovskites with High Luminescence and Stability
journal contribution
posted on 05.09.2019, 16:33 authored by Chun Sun, Zhiyuan Gao, Yuchen Deng, Hanxin Liu, Le Wang, Sijing Su, Peng Li, Huanrong Li, Zihui Zhang, Wengang BiLead 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 658 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.