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Yb3+ and Yb3+/Er3+ Doping for Near-Infrared Emission and Improved Stability of CsPbCl3 Nanocrystals.


ABSTRACT: Lead halide perovskite nanocrystals (NCs) exhibit excellent tunable emissions covering the entire visible spectral region, but they do not emit near-infrared (NIR) light. We synthesized rare earth element doped CsPbCl3 NCs for NIR emission. The Yb3+ doped CsPbCl3 NCs emitted strong 986 nm NIR light; the Yb3+/Er3+ co-doped CsPbCl3 NCs emitted at 1533 nm. The total photoluminescence quantum yield (PL QY) of the CsPbCl3 NCs changed from 5.0% to 127.8% upon incorporating 2.0% Yb3+, a factor of 25.6 times enhancement. The material's stability was tested under continuous ultraviolet (365 nm) irradiation. The doped CsPbCl3 NCs exhibited a better stability than the undoped one. The PL intensity of the undoped CsPbCl3 NCs dropped to 20% of the initial value in 27 h, while the doped one took 85 h.

SUBMITTER: Zhang X 

PROVIDER: S-EPMC6263171 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Yb<sup>3+</sup> and Yb<sup>3+</sup>/Er<sup>3+</sup> Doping for Near-Infrared Emission and Improved Stability of CsPbCl<sub>3</sub> Nanocrystals.

Zhang Xiangtong X   Zhang Yu Y   Zhang Xiaoyu X   Yin Wenxu W   Wang Yu Y   Wang Hua H   Lu Min M   Li Zhiyang Z   Gu Zhiyong Z   Yu William W WW  

Journal of materials chemistry. C 20180829 37


Lead halide perovskite nanocrystals (NCs) exhibit excellent tunable emissions covering the entire visible spectral region, but they do not emit near-infrared (NIR) light. We synthesized rare earth element doped CsPbCl<sub>3</sub> NCs for NIR emission. The Yb<sup>3+</sup> doped CsPbCl<sub>3</sub> NCs emitted strong 986 nm NIR light; the Yb<sup>3+</sup>/Er<sup>3+</sup> co-doped CsPbCl<sub>3</sub> NCs emitted at 1533 nm. The total photoluminescence quantum yield (PL QY) of the CsPbCl<sub>3</sub> NC  ...[more]

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