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Issue 43, 2020
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Facile solution synthesis of Bi3+/Yb3+ ions co-doped Cs2Na0.6Ag0.4InCl6 double perovskites with near-infrared emission

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Abstract

Double perovskites have attracted wide attention due to their low toxicity and good thermal stability. Doping with active elements is a promising method to endow perovskites with excellent optical, electrical or magnetic properties. Herein, a facile aqueous solution method is developed to synthesize Bi3+–Yb3+ co-doped Cs2Na0.6Ag0.4InCl6 double perovskite. Besides the intrinsic warm white self-trapped exciton (STE) emission that originated from the Cs2Na0.6Ag0.4InCl6 host, the samples also exhibit a strong near-infrared emission assigned to the 2F5/22F7/2 transition of octahedral coordinated Yb3+ ions upon excitation with ultraviolet light. The optimized sample shows a markedly high photoluminescence quantum yield of 84.7%. The photophysical studies such as photoluminescence (PL) and photoluminescence excitation spectra, temperature-dependent PL spectra, and PL decay curves reveal that the strong Yb3+ emission is attributed to the energy transfer from STEs to the Yb3+ ions. Finally, the lead-free double perovskite phosphor-converted LED containing visible and NIR regions was fabricated, with 8.92 mW output power at 100 mA drive current. The results show the great potential of the as-prepared crystals in optoelectronics applications.

Graphical abstract: Facile solution synthesis of Bi3+/Yb3+ ions co-doped Cs2Na0.6Ag0.4InCl6 double perovskites with near-infrared emission

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Supplementary files

Article information


Submitted
05 Sep 2020
Accepted
24 Sep 2020
First published
24 Sep 2020

Dalton Trans., 2020,49, 15231-15237
Article type
Paper

Facile solution synthesis of Bi3+/Yb3+ ions co-doped Cs2Na0.6Ag0.4InCl6 double perovskites with near-infrared emission

G. Zhang, Y. Wei, P. Dang, H. Xiao, D. Liu, X. Li, Z. Cheng and J. Lin, Dalton Trans., 2020, 49, 15231 DOI: 10.1039/D0DT03102J

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