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Efficient and tunable photoluminescence for terbium-doped rare-earth-based Cs 2 NaYCl 6 double perovskite.

Authors :
Liang H
Yang G
Bai S
Li C
Li X
Wang Y
Huang J
Ji J
Zhu Y
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