用于高亮度芯片级封装 LED 的超薄绿色发光 LuAG:Ce-Al2O3 复合细粒陶瓷

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

Journal of The European Ceramic Society Pub Date : 2024-09-25 DOI:10.1016/j.jeurceramsoc.2024.116948

Junrong Ling , Ye Zhang , Haitao Zhang , Wentao Xu , Youfu Zhou , Maochun Hong

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引用次数: 0

摘要

为实现具有高亮度的绿色发光芯片级封装 LED（CSP-LED），迫切需要探索具有高光通量（LF）和发光效率（LE）的超薄绿色发光荧光粉陶瓷（PC）。通过真空固态烧结法制备了 LuAG:Ce-Al2O3 细颗粒陶瓷（厚约 150 μm）。当 Ce3+ 浓度 x = 0.02 时，超薄 LuAG:Ce PC 的功率可达 199.26 lm W-1@50 W。引入 Al2O3 后产生的细粒复合结构使 LE 增加到 209.95 lm W-1@50 W，并将 200℃ 时的热稳定性从 91.7% 提高到 97.2%。值得注意的是，相应的最佳封装 CSP-LED 显示了高达 978.3 lm@3500 mA 的绿色照明低频。因此，这类 LuAG:Ce-Al2O3 PC 是 CSP-LED 颜色转换器的理想候选材料。

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Ultrathin green-emitting LuAG:Ce-Al2O3 composite fine-grained ceramics for high-brightness chip-scale packaging LEDs

To realize green-emitting chip-scale packaging LEDs (CSP-LEDs) with high-brightness, the ultrathin green-emitting phosphor ceramic (PC) with high luminous flux (LF) and luminous efficiency (LE) is urgently explored. LuAG:Ce-Al₂O₃ fine-grained ceramics (about 150 μm thick) were prepared via vacuum solid-state sintering. Ultrathin LuAG:Ce PC owns LE up to 199.26 lm W⁻¹@50 W as high Ce³⁺ concentration x = 0.02. Fine-grained composite structure induced by the introduction of Al₂O₃ results in an increase of LE to 209.95 lm W⁻¹@50 W and an improvement of thermal stability from 91.7 % to 97.2 % at 200℃. It is noteworthy that corresponding optimal packaging CSP-LEDs demonstrates the LF of green lighting up to 978.3 lm@3500 mA. Thus these type of LuAG:Ce-Al₂O₃ PC is a promising candidate for the color converter of CSP-LEDs.

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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.