Issue 41, 2023

High brightness and vibronic luminescent behavior of YAG:Mn4+/Ca2+ red phosphor for preparing phosphor-in-glass in white LED

Abstract

Developing red-phosphors with outstanding chemical and luminescent stability is essential for fabricating phosphor-in-glass (PiG) for the next-generation solid-state lighting source because the currently commercial silica red phosphor easily suffers from corrosion by glass melt. Herein, we report the discovery of an enhanced red-emitting aluminate phosphor of Mn4+/Ca2+ co-doped YAG (YAGMC) using a full-solution combustion approach. This phosphor exhibits two broad excitation bands with an optimum doping level of only 0.2 at%. Under 470 nm light excitation, the emission intensity of YAGMC is greatly enhanced by 7 times compared with that of phosphor without Ca2+. Both Stokes and anti-Stokes bands are identified as originating from the same luminescence dynamic process. By performing a theoretical simulation, the predominant phonon in the vibronic process is determined to be 25 meV in energy. Temperature-dependent PL spectra exhibit excellent thermal stability at T < 260 K, while a serious thermal quenching phenomenon occurs at high temperatures. Finally, the YAGMC-based PiG is fabricated for constructing an LED device, and the measured results reveal a significant effect of PiG on luminous performance. From both experimental and theoretical viewpoints, our study demonstrates an efficient approach to enhancing red emission by a co-doping approach and provides a deep insight into the internal photophysical mechanism for YAGMC red phosphor.

Graphical abstract: High brightness and vibronic luminescent behavior of YAG:Mn4+/Ca2+ red phosphor for preparing phosphor-in-glass in white LED

  • This article is part of the themed collection: #MyFirstJMCC

Article information

Article type
Paper
Submitted
01 септ. 2023
Accepted
27 септ. 2023
First published
29 септ. 2023

J. Mater. Chem. C, 2023,11, 14413-14420

High brightness and vibronic luminescent behavior of YAG:Mn4+/Ca2+ red phosphor for preparing phosphor-in-glass in white LED

C. Li, F. Tang, Y. Xiao, Y. Zhou, B. Zhao and S. Lv, J. Mater. Chem. C, 2023, 11, 14413 DOI: 10.1039/D3TC03172A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements