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Efficient and tunable photoluminescence for terbium-doped rare-earth-based Cs 2 NaYCl 6 double perovskite.
- Source :
-
Optics letters [Opt Lett] 2022 Oct 01; Vol. 47 (19), pp. 5176-5179. - Publication Year :
- 2022
-
Abstract
- Lead-free double perovskite materials with efficient and stable self-trapped exciton (STE) emissions show enormous potential for next-generation solid-state lighting. However, the low-emission efficiency and difficulty of spectral regulation are two major obstacles to their application. Here, all-inorganic rare-earth-based double perovskite Cs <subscript>2</subscript> NaYCl <subscript>6</subscript> single crystals with strong blue emissions were reported as effective hosts to accommodate lanthanide ion doping. By controlling the introduction of Tb <superscript>3 +</superscript> ions and efficient energy transfer from the STEs to the dopants, the emission color of Cs <subscript>2</subscript> NaYCl <subscript>6</subscript> single crystals was flexibly modulated from blue to green. The quantum yields were also significantly improved from 10% to 78.81% by optimizing the Tb <superscript>3 +</superscript> ion concentration. Further, stable light-emitting diode prototypes based on Cs <subscript>2</subscript> NaYCl <subscript>6</subscript> color conversion materials were fabricated to demonstrate the practical applications of rare-earth-based double perovskite.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 47
- Issue :
- 19
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 36181215
- Full Text :
- https://doi.org/10.1364/OL.472170