Loading…

Synthesis and luminescence properties of orange–red-emitting Ca9La(VO4)7:Sm3+ phosphors co-doped with alkali metal ions

Orange–red-emitting phosphors Ca 9 La(VO 4 ) 7 :Sm 3+ and Ca 9 La(VO 4 ) 7 :Sm 3+ ,M + (M +  = Li + , Na + , and K + ) were synthesized by the combustion method. Their crystal structure, microstructure, luminescence properties, and decay performance were investigated in detail. The results revealed...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2019-05, Vol.30 (10), p.9184-9193
Main Authors: Dai, Mingfeng, Qiu, Kehui, Zhang, Peicong, Zhang, Wentao
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Orange–red-emitting phosphors Ca 9 La(VO 4 ) 7 :Sm 3+ and Ca 9 La(VO 4 ) 7 :Sm 3+ ,M + (M +  = Li + , Na + , and K + ) were synthesized by the combustion method. Their crystal structure, microstructure, luminescence properties, and decay performance were investigated in detail. The results revealed that the as-prepared samples were crystallized in a trigonal structure (space group of R3c , No. 161). Under 405-nm excitation, the Ca 9 La(VO 4 ) 7 :Sm 3+ phosphor exhibited excellent orange–red emission. The Sm 3+ ions were quenched at 0.02 equivalents by electric dipole–dipole interactions. After the introduction of alkali metal ions Li + , Na + , and K + , the luminescence properties of the Ca 9 La(VO 4 ) 7 :Sm 3+ samples were noticeably enhanced, particularly those of that co-doped with Li + . The chromaticity coordinates of Ca 9 La(VO 4 ) 7 :0.02Sm 3+ , 0.02Li + and Ca 9 La(VO 4 ) 7 :0.02Sm 3+ were (0.610, 0.390) and (0.604, 0.395), respectively, close to those of the commercial red phosphor Y 2 O 2 S:Eu 3+ (0.622, 0.351). The results suggested that the Ca 9 La(VO 4 ) 7 :0.02Sm 3+ , 0.02Li + phosphor may serve as an orange–red emitter for applications in white light-emitting diodes excited by near-ultraviolet radiation.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-019-01247-7