透明Ce:(Lu,Gd) 3al2o12 & & & ash; al2o3纳米陶瓷颜色转换器通过全玻璃结晶制备用于大功率白光LED/LD照明

IF 18.6 1区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of Advanced Ceramics Pub Date : 2023-10-01 DOI:10.26599/jac.2023.9220823
Jie Fu, Ying Zhang, Shaowei Feng, Mathieu Allix, Cécile Genevois, Emmanuel Veron, Zhibiao Ma, Wenlong Xu, Linghan Bai, Ruyu Fan, Yafeng Yang, Hui Wang, Jianqiang Li
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引用次数: 0

摘要

Ce掺杂Lu3Al5O12 (Ce:LuAG)透明陶瓷由于其优异的发光效率、较高的热猝灭温度和良好的热稳定性,被认为是固态照明中有前途的颜色转换器。而Ce:LuAG陶瓷主要发出绿光。红光的缺乏以及Lu化合物昂贵的价格阻碍了它们在白色照明中的应用。本文通过玻璃晶化法制备了不同Gd3+取代量(10% ~ 50%)的透明(Lu,Gd)3Al5O12-Al2O3 (LuGAG-Al2O3)纳米陶瓷。制备的全纳米级陶瓷由LuGAG主晶相和Al2O3次晶相组成,透明度为81.0%@780 nm。Ce3+掺杂后,Ce:LuGAG-Al2O3纳米陶瓷呈现出明显的红移(510 nm→550 nm),弥补了发射光谱中红光成分的不足。含20% Gd3+的Ce:LuAG-Al2O3纳米陶瓷具有较高的内量子效率(IQE为81.5%,Ce:LuAG-Al2O3纳米陶瓷为96.7%)和良好的热稳定性(150℃时IQE仅损失9%)。当与蓝色LED芯片(10 W)结合使用时,含有20% Gd3+的0.3%Ce:LuGAG-Al2O3纳米陶瓷成功实现了色坐标为(0.3566,0.435)、色温为4347 K、显色指数为67.7、发光效率为175.8 lm·W-1的高品质暖白光LED照明。当蓝色激光(5 W·mm-2)激发0.3%Ce:LuGAG-Al2O3透明纳米陶瓷时,发射峰位置从517 nm红移到570 nm,发射光呈现出由绿色到黄绿色到橙黄色的连续变化,最大发光效率可达234.49 lm·W-1 (20% Gd3+)。考虑到高量子效率、良好的热稳定性、优异的可调发光性能,本文中不同Gd3+取代含量的透明Ce:LuGAG-Al2O3纳米陶瓷被认为是高功率白光LED/LD照明的有希望的候选材料。
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Transparent Ce:(Lu,Gd) 3Al 5O 12&ndash;Al 2O 3 nanoceramic color converters elaborated via full glass crystallization for high-power white LED/LD lighting
Ce dopped Lu3Al5O12 (Ce:LuAG) transparent ceramics are considered as promising color converters for solid-state lighting because of their excellent luminous efficiency, high thermal quenching temperature and good thermal stability. However, Ce:LuAG ceramics mainly emit green light. The shortage of red light as well as the expensive price of Lu compounds are hindering their application for white lighting. In this work, transparent (Lu,Gd)3Al5O12-Al2O3 (LuGAG-Al2O3) nanoceramics with different replacing contents of Gd3+ (10%-50%) were successfully elaborated via a glass-crystallization method. The obtained ceramics with full nanoscale grains are composed of main LuGAG crystalline phase and secondary Al2O3 phase, exhibiting eminent transparency of 81.0%@780 nm. After doping by Ce3+, the Ce:LuGAG-Al2O3 nanoceramics show a significant red shift (510 nm→550 nm) and makes up for the deficiency of red light component in the emission spectrum. The Ce:LuAG-Al2O3 nanoceramics with 20% Gd3+ show high internal quantum efficiency (81.5% in IQE, 96.7% of Ce:LuAG-Al2O3 nanoceramics) and good thermal stability (only 9% loss in IQE at 150 ℃). When combined with blue LED chips (10 W), 0.3%Ce:LuGAG-Al2O3 nanoceramics with 20% Gd3+ successfully realize the high quality warm white LED lighting with a color coordinates of (0.3566, 0.435), a color temperature of 4347 K, a CRI of 67.7 and a luminous efficiency of 175.8 lm·W-1. When the transparent 0.3%Ce:LuGAG-Al2O3 nanoceramics are excited by blue laser (5 W·mm-2), the emission peak position red shifts from 517 nm to 570 nm, the emitted light exhibits a continuous change from green to yellow light green light to orange-yellow light and the maximum luminous efficiency is up to 234.49 lm·W-1 (20% Gd3+). Taking into account the high quantum efficiency, good thermal stability, excellent and adjustable luminous properties, the transparent Ce:LuGAG-Al2O3 nanoceramics with different Gd3+ substitution contents in this paper are believed to be promising candidates for high-power white LED/LD lighting.
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来源期刊
Journal of Advanced Ceramics
Journal of Advanced Ceramics MATERIALS SCIENCE, CERAMICS-
CiteScore
21.00
自引率
10.70%
发文量
290
审稿时长
14 days
期刊介绍: Journal of Advanced Ceramics is a single-blind peer-reviewed, open access international journal published on behalf of the State Key Laboratory of New Ceramics and Fine Processing (Tsinghua University, China) and the Advanced Ceramics Division of the Chinese Ceramic Society. Journal of Advanced Ceramics provides a forum for publishing original research papers, rapid communications, and commissioned reviews relating to advanced ceramic materials in the forms of particulates, dense or porous bodies, thin/thick films or coatings and laminated, graded and composite structures.
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