Fabrication of ternary ZrO2-Al2O3-YAG:Ce ceramic phosphors for white light-emitting diodes. Issue 2 (February 2021)

• Record Type: Journal Article
• Authors: Chen, Jie; Weng, Zixin; Tang, Yanru; Yi, Xuezhuan; Tian, Yanna; Zhao, Di; Lin, Hui; Zhou, Shengming
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 2(2021)
• Page Start: 1572
• Page End: 1578
• Publication Date: 2021-02
• Subjects: Ternary ceramic phosphors -- Redshift emission -- Warm w-LEDs -- Luminous efficiency; 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.2020.10.027
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Ternary ZrO2 -Al2 O3 -YAG:Ce (ZA-YAG:Ce) phosphor ceramics with a different volume ratio of ZrO2 addition were fabricated through vacuum solid-state reaction. From the EDS analysis result, it was discovered that the three phases can co-exist with each other independently after sintering. The emission peak of Ce 3+ redshifts from 535 nm to 560−570 nm with the increasing of ZrO2, which is argued to be related to the non-radiative transition process between the 5d1 level of Ce 3+ and oxygen vacancy levels. After packaged with blue chips, the w-LED based on ZA-YAG:Ce ceramic shows an enhanced CRI of 64 compared to Al2 O3 -YAG:Ce and a high LE of 92.36 lm/W, which is greatly promoted compared to the previous report of ZrO2 -YAG:Ce. The result has indicated the great application prospect of ZA-YAG:Ce ceramic phosphors in warm w-LEDs.