A novel redshift mechanism of Ce3+ emission in ZrO2-Ce: YAG composite phosphor ceramics. Issue 15 (December 2020)

• Record Type: Journal Article
• Authors: Chen, Jie; Tang, Yanru; Yi, Xuezhuan; Tian, Yanna; Zhao, Di; Lin, Hui; Zhou, Shengming
• Is Part Of: Journal of the European Ceramic Society. Volume 40:Issue 15(2020)
• Page Start: 5852
• Page End: 5858
• Publication Date: 2020-12
• Subjects: Fluorescent materials -- Composite ceramics -- ZrO2-Ce: Y3Al5O12 -- Redshift mechanism -- White light illumination; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2020.06.026
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In this work, ZrO2 -Ce: YAG composite phosphor ceramic for the application of high brightness w-LEDs was fabricated for the first time. A novel redshift mechanism of Ce 3+ emission is discovered in the composite ceramics that the oxygen vacancy introduced into YAG lattice by the high-temperature reduction of Zr 4+ can cause a remarkable non-radiative transition of excited electrons and produce a large redshift from 540 nm to 570 ∼ 610 nm. This kind of redshift has provided a new approach to the supplement of the red component in Ce 3+ emission spectra beyond the regular ways of larger rare-earth ions doping or M 2+ -N 4+ double substitution.