High recorded color rendering performance of single-structured Ce,Mn:Y3(Al,Sc)2Al3O12 phosphor ceramics for high-power white LEDs/LDs

• Published in: Journal of advanced ceramics Vol. 13; no. 6; pp. 810 - 820
• Main Authors: Xuanchu Liu, Congcong Yang, Yanbin Li, Chang Min, Jian Kang, Tianyuan Zhou, Chunming Zhou, Chaofan Shi, Cen Shao, Bingheng Sun, Wieslaw Strek, Hao Chen, Le Zhang
• Format: Journal Article
• Language: English
• Published: Tsinghua University Press 01-06-2024
• Subjects: ce:y3al5o12 (ce:yag) phosphor ceramics (pcs); color converter; color rendering index (cri); high-power white light-emitting diodes or laser diodes (leds/lds); luminous stability
• ISSN: 2226-4108; 2227-8508
• DOI: 10.26599/JAC.2024.9220900

Achieving a high color rendering index (CRI) and luminous stability in single-structured Ce:Y3Al5O12 (Ce:YAG) phosphor ceramics (PCs) is crucial for high-power white light-emitting diodes or laser diodes (LEDs/LDs). However, cyan valleys and insufficient amounts of the red component in the Ce:YAG emission spectra significantly limit their real applications. In this work, a series of Ce,Mn:Y3(Al,Sc)2Al3O12 (Ce,Mn:YSAG) PCs were fabricated by vacuum sintering, and efficient spectral regulation was realized for full-color lighting. The cyan valley was filled by the blueshifted emission peak of Ce3+ via Sc3+ doping. The orange‒red emission at approximately 580 nm was effectively supplemented via Mn2+ doping. In particular, CRI of Ce,Mn:YSAG increased from 56.4 to 85.8, a 52% increase compared with that of Ce:YAG under high-power LED excitation, and the operating temperature was stable at approximately 50 °C for long working time. Moreover, CRI of 80.9 could still be obtained for PC-based white LDs. These results indicated that Ce,Mn:YSAG PC, which has excellent CRI and luminous stability, is an extremely promising color convertor for high-power white LEDs/LDs.