Yb3+ and Yb3+/Er3+ doping for near-infrared emission and improved stability of CsPbCl3 nanocrystals

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;...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 6; no. 37; pp. 10101 - 10105
Main Authors Zhang, Xiangtong, Zhang, Yu, Zhang, Xiaoyu, Yin, Wenxu, Wang, Yu, Wang, Hua, Lu, Min, Li, Zhiyang, Gu, Zhiyong, Yu, William W
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2018
Subjects
Emission
Erbium
Nanocrystals
Near infrared radiation
Perovskites
Photoluminescence
Rare earth elements
Spectra
Spectral emittance
Stability
X ray photoelectron spectroscopy
Ytterbium
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Summary: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.
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ISSN:2050-7526
2050-7534
DOI:10.1039/c8tc03957g