Partial substitution-induced luminescent improvement in Dy3+-activated tellurooxyphosphate phosphor

A series of Dy3+-doped tellurooxyphosphate-based phosphors: Na3Ca4-x(TeO3)(PO4)3:xDy3+ and Na3Ca3.91-yGdy(TeO3)(PO4)3:0.09Dy3+ were obtained by a microwave-assisted synthesis, aiming to develop photoluminescent materials suitable for phosphor-converted white light-emitting diodes (pc-wLED). The effe...

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Bibliographic Details
Published in:Optical materials Vol. 148; p. 114859
Main Authors: Song, Ruitong, Tang, Huan, Li, Junpeng, Niu, Yingfan, Liu, Yuxin, He, Jiayi, Zhu, Jing
Format: Journal Article
Language:English
Published: Elsevier B.V 01.02.2024
Subjects:
Dysprosium
Gadolinium
Partial substitution
Tellurooxyphosphate
Thermostability
Thermostability
Gadolinium
Tellurooxyphosphate
Dysprosium
Partial substitution
ISSN:0925-3467
Online Access:Get full text
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Summary:A series of Dy3+-doped tellurooxyphosphate-based phosphors: Na3Ca4-x(TeO3)(PO4)3:xDy3+ and Na3Ca3.91-yGdy(TeO3)(PO4)3:0.09Dy3+ were obtained by a microwave-assisted synthesis, aiming to develop photoluminescent materials suitable for phosphor-converted white light-emitting diodes (pc-wLED). The effect of Gd3+ partial substitution on the luminescent enhancement of Na3Ca3.91-yGdy(TeO3)(PO4)3:0.09Dy3+ phosphor was investigated in detail. When the substitution amount of Gd3+ is 0.06, the luminescence intensity is significantly enhanced. Simultaneously, the partial substitution of Gd3+ induces the increase of the structural rigidity, leading to higher thermostability and better resistance to chromaticity shifting. The study provides a potential yellow-emitting material for pc-wLED. [Display omitted] •The partial substitution of Gd3+ enhances the luminescent performance of Na3Ca4(TeO3)(PO4)3:Dy3+.•The title phosphor displays the excellent luminescence stability.•The assembled pc-wLED produces white light with Ra = 83.6 and CCT = 4272 K.
ISSN:0925-3467
DOI:10.1016/j.optmat.2024.114859