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Facile solution synthesis of Bi 3+ /Yb 3+ ions co-doped Cs 2 Na 0.6 Ag 0.4 InCl 6 double perovskites with near-infrared emission.
- Source :
-
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2020 Nov 10; Vol. 49 (43), pp. 15231-15237. - Publication Year :
- 2020
-
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 2F5/2 → 2F7/2 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.
Details
- Language :
- English
- ISSN :
- 1477-9234
- Volume :
- 49
- Issue :
- 43
- Database :
- MEDLINE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Publication Type :
- Academic Journal
- Accession number :
- 33043950
- Full Text :
- https://doi.org/10.1039/d0dt03102j