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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 3/2024

01-01-2024

Thermally stable double perovskite Ca2YTaO6: Tb3+, Eu3+ phosphor for warm white LEDs

Authors: Jian-tao Lü, Jun-xian Mai, Ting Fan, Jie Liang

Published in: Journal of Materials Science: Materials in Electronics | Issue 3/2024

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Abstract

A series of single-phase double perovskite Ca2YTaO6: Tb3+, Eu3+ phosphors were successfully synthesized by means of a high-temperature solid-state method. The crystal structure, luminescence spectrum, decay lifetime, thermal stability and energy transfer properties were investigated in detail. Under the excitation of 250 nm, Ca2YTaO6: Tb3+, Eu3+ had notable green and red light emissions at 551 nm and 618 nm, respectively. The optimal doping concentration of Tb3+ was 16 mol%. Owing to the energy transfer effect between Tb3+ and Eu3+, a tuneable luminescence from green to yellow was realized with the increase in Eu3+ doping concentration. When the temperature of the phosphor was increased from 300 to 500 K, the emission intensity remained 75% of that at room temperature. The Ca2Y0.82TaO6: 0.16Tb3+, 0.02Eu3+ phosphor was encapsulated with a 365 nm chip, and a warm white LED with CIE colour coordinates (0.365, 0.371) and low colour temperature (CCT < 5000 K) was successfully prepared.
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Metadata
Title
Thermally stable double perovskite Ca2YTaO6: Tb3+, Eu3+ phosphor for warm white LEDs
Authors
Jian-tao Lü
Jun-xian Mai
Ting Fan
Jie Liang
Publication date
01-01-2024
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 3/2024
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-024-11992-z

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