Cold sintered Ce3+:Lu3Al5O12-Mn4+:K2SiF6-Y3+:CaF2 transparent ceramic phosphors for high color rendering white LEDs/LDs

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-02-19 DOI:10.1016/j.jeurceramsoc.2025.117315

Xiaotong Li, Rui Zhang, Xuejun Wei, Zusheng Xu, Xianzhuang Qin

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引用次数: 0

Abstract

Transparent ceramics with ultra-wide emission spectra are widely considered as the next-generation color converters for high color rendering white light emitting diodes (LEDs) and laser diodes (LDs). Herein, a novel Ce³⁺:Lu₃Al₅O₁₂-Mn⁴⁺:K₂SiF₆-Y³⁺:CaF₂ transparent ceramic phosphor was prepared by the cold sintering method. The samples sintered at 250 °C and 175 MPa exhibit considerable visible transmittance (about 43%) and uniform grain distribution with no interfacial reaction. When excited at 460 nm, the samples exhibit both broad green emission bands (Ce³⁺: 5d → 4 f) and sharp red peaks (Mn⁴⁺: ²E_g → ⁴A_2g), possessing over 90% internal quantum efficiencies and quite small thermal quenching. The assembled white LED exhibits luminous efficiency (LE) of 96.4 lm/W and color rendering index (CRI) of 94.5, while the reflection-type white LD shows LE of 207.4 lm/W and CRI of 85.0. It demonstrates that the Ce³⁺:Lu₃Al₅O₁₂-Mn⁴⁺:K₂SiF₆-Y³⁺:CaF₂ transparent ceramics exhibit great potential in the high-power LED/LD lighting.

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.