Blue photons excited highly chromatic red light emitting K3La(PO4)2:Pr3+ phosphors for white light emitting diodes

被引：34

作者：

Bedyal, A. K. ^{[1
]}

Ramteke, D. D. ^{[1
]}

Kumar, Vinay ^{[1
,2
]}

Swart, H. C. ^{[1
]}

机构：

[1] Univ Free State, Dept Phys, POB 339, ZA-9300 Bloemfontein, South Africa

[2] Cent Univ Jammu, Dept Phys & Astron Sci, Jammu 180011, Jammu & Kashmir, India

来源：

MATERIALS RESEARCH BULLETIN | 2018年 / 103卷

基金：

新加坡国家研究基金会;

关键词：

LEDs; FEDs; Phosphors; Solid state lighting; ENERGY-TRANSFER; THERMOLUMINESCENCE; PHOTOLUMINESCENCE;

D O I：

10.1016/j.materresbull.2018.03.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly chromatic blue photons excited red emitting K3La(PO4)(2):Pr3+ (0-1.8 mol%) phosphors were synthesized by solution combustion method. The resulted phosphors showed peanut like morphology and had a monoclinic phase with space group P2(1)/m. The photoluminescence studies disclosed that the phosphor emits red light due to the D-1(2) -> H- 3(4) and D-1(2 )-> H-3(5) transition of the Pr3+ ions under blue photons excitation. The optimal concentration for the Pr3+ ions were optimized to be 1.2 mol% after which concentration quenching occurred. Dipole-dipole interaction among the dopant ions was found to be responsible for the concentration quenching. X-ray photoelectron spectroscopy results depicted that Pr was present in the (+3) valance state in the phosphor. The photometric results suggest that the phosphor with a high color purity similar to 97.8% and enough quantum yield similar to 27% could be an eventual choice as the red component for white light emitting diodes.

引用

页码：173 / 180

页数：8

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