Cation substitution induced highly symmetric crystal structure in cyan-green-emitting Ca2La1-Lu Hf2Al3O12:Ce3+ solid-solution phosphors with enhanced photoluminescence emission and thermal stability: Toward full-visible-spectrum white LEDs

青色 荧光粉 材料科学 量子效率 光致发光 发光二极管 显色指数 光电子学 离子 发光 光学 化学 物理 有机化学
作者
Jingming Chan,Lina Cao,Zhe Xü,Xiaoyong Huang
出处
期刊:Materials Today Physics [Elsevier BV]
卷期号:35: 101130-101130 被引量:32
标识
DOI:10.1016/j.mtphys.2023.101130
摘要

Highly efficient cyan-green-emitting phosphors are urgently needed for high-color-quality full-visible-spectrum white light-emitting diodes (LEDs). Herein, we report on efficient near-ultraviolet-excited cyan-green-emitting Ca2La1-xLuxHf2Al3O12:Ce3+ (CLa1-xLuxHA:Ce3+) garnet phosphors, which are developed based on the solid-solution design of chemical cation substitution. All phosphor samples present a garnet crystal structure with the Ia3‾d space group; with increasing Lu3+ ions content, the lattice could be gradually contracted, along with a high symmetry as well as rigidity. Furthermore, under the 408 nm excitation, the cyan-green emissions of CLa1-xLuxHA:Ce3+ phosphors are progressively enhanced with a slight blue-shift, due to crystal field splitting and Stokes shift. Importantly, quantum efficiency and thermal stability performances are greatly improved by introducing smaller Lu3+ ions to replace the bigger La3+ ions, owing to the high rigidity structure with high symmetry. The optimized CLa0.5Lu0.5HA:Ce3+ phosphor exhibits an intense cyan-green emission band with high internal quantum efficiency of 76.4% and external quantum efficiency of 54.4%. Through employing the as-prepared CLa0.5Lu0.5HA:Ce3+ cyan-green phosphor, we have successfully fabricated a full-visible-spectrum LED device, demonstrating a bright warm-white light emission with an extremely high color rendering index (Ra = 98.0, R9 = 95.9, and R12 = 94.3) and low correlated color temperature (3497 K) under 100 mA driving current. This study not only reveals the correlation between the crystal structure evolution and luminescent properties of phosphor materials, but also provides new strategies for the design and development of novel efficient luminescent materials for high-quality full-visible-spectrum LED lighting.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
fd163c应助Chambray采纳,获得10
1秒前
cupid发布了新的文献求助10
2秒前
小白鹅爱学习完成签到,获得积分10
2秒前
2秒前
pluto应助tt耶采纳,获得10
2秒前
2秒前
没有蛀牙发布了新的文献求助30
2秒前
可爱的函函应助Allonz采纳,获得10
2秒前
3秒前
顾矜应助杨xy采纳,获得10
3秒前
占曼荷发布了新的文献求助10
4秒前
欣慰的海发布了新的文献求助10
4秒前
someone完成签到,获得积分10
4秒前
北落发布了新的文献求助10
4秒前
5秒前
5秒前
5秒前
5秒前
善学以致用应助Dpd采纳,获得10
6秒前
Sakura关注了科研通微信公众号
6秒前
6秒前
6秒前
7秒前
TOMMY233完成签到,获得积分10
7秒前
Handsome发布了新的文献求助10
7秒前
斯文败类应助zuliya采纳,获得10
7秒前
会飞的蜗牛完成签到,获得积分10
7秒前
7秒前
7秒前
苹果雨旋发布了新的文献求助10
8秒前
热情曲奇完成签到,获得积分10
8秒前
8秒前
9秒前
善学以致用应助jinzheng采纳,获得10
9秒前
花开hhhhhhh发布了新的文献求助10
9秒前
占曼荷完成签到,获得积分10
10秒前
lcy完成签到,获得积分10
10秒前
耐凡不哭完成签到,获得积分10
10秒前
yar应助科研通管家采纳,获得10
10秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 1000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3978526
求助须知:如何正确求助?哪些是违规求助? 3522634
关于积分的说明 11214133
捐赠科研通 3260065
什么是DOI,文献DOI怎么找? 1799744
邀请新用户注册赠送积分活动 878642
科研通“疑难数据库(出版商)”最低求助积分说明 807002