Highly Regular, Uniform K3ScF6:Mn4+ Phosphors: Facile Synthesis, Microstructures, Photoluminescence Properties, and Application in Light-Emitting Diode Devices

荧光粉 材料科学 光致发光 二极管 发光二极管 微观结构 光电子学 冶金
作者
Hong Ming,Shuifu Liu,Lili Liu,Jiaqing Peng,Junxiang Fu,Fu Du,Xinyu Ye
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:10 (23): 19783-19795 被引量:175
标识
DOI:10.1021/acsami.8b01885
摘要

A new generation of red phosphors of complex fluoride matrices activated with Mn4+ has gained a broad interest in getting high color quality and low color temperature of solid-state white light-emitting diodes (WLEDs). However, besides their instability toward moisture, the extremely irregular and nonuniform morphologies of these phosphors have limited their practical industry applications. In the present study, a novel type of K3ScF6:Mn4+ red phosphor with highly regular, uniform, and high color purity was obtained successfully through a facile coprecipitation route under mild conditions. The crystal structure was identified with aids of the powder X-ray diffraction, Rietveld refinement, and density functional theory calculations. The prototype crystallizes in the space group Fm3 m with a cubic structure, and the lattice parameters are fitted well to be a = b = c = 8.4859(8) Å and V = 611.074(2) Å3. The Mn4+ ions occupy Sc3+ sites and locate at the centers of the distorted ScF6 octahedrons. A wide band gap of approximately 6.15 eV can provide sufficient space to accommodate impurity energy levels. Unlike most other Mn4+ ion-activated fluoride phosphors, the as-prepared K3ScF6:Mn4+ phosphors demonstrate highly uniform and regular morphologies with shapes transforming from cube to octahedron with increasing Mn4+ ion concentration. Under blue light excitation, the as-prepared K3ScF6:Mn4+ sample exhibits intense sharp-line red fluorescence (the strongest peak located at 631 nm) with high color purity. An excellent recovery in luminescence upon heating and cooling processes implies high stability of K3ScF6:Mn4+. Furthermore, a warm WLED fabricated with blue GaN chips merged with the mixture of K3ScF6:Mn4+ and the well-known commercial YAG:Ce3+ yellow phosphors exhibits wonderful color quality with lower correlated color temperature (3250 K) and higher color-rendering index ( Ra = 86.4). These results suggest that the K3ScF6:Mn4+ phosphor possesses stupendous potentiality for practical applications.
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
杉杉发布了新的文献求助10
刚刚
黑粉头头发布了新的文献求助10
刚刚
科目三应助明理栾采纳,获得10
刚刚
哈皮发布了新的文献求助10
1秒前
潇洒愚志发布了新的文献求助10
2秒前
4秒前
入门的橙橙完成签到 ,获得积分10
5秒前
尔尔发布了新的文献求助30
5秒前
红叶完成签到,获得积分10
5秒前
champagnefeng完成签到,获得积分10
7秒前
8秒前
潇洒愚志完成签到,获得积分20
8秒前
杉杉完成签到,获得积分20
9秒前
9秒前
翎儿响叮当完成签到 ,获得积分10
10秒前
pcr163应助小王爱吃饭采纳,获得50
10秒前
纳斯达克发布了新的文献求助10
11秒前
内向姿完成签到,获得积分10
11秒前
量子星尘发布了新的文献求助10
11秒前
追寻的听白完成签到,获得积分10
11秒前
袁睿韬发布了新的文献求助10
11秒前
斯文败类应助lc采纳,获得10
12秒前
Zengyuan完成签到,获得积分10
12秒前
12秒前
13秒前
mokLee63完成签到 ,获得积分10
14秒前
14秒前
14秒前
15秒前
liuxiaoer发布了新的文献求助10
15秒前
拉拉完成签到,获得积分10
16秒前
major发布了新的文献求助10
16秒前
23582发布了新的文献求助10
16秒前
yingzi发布了新的文献求助10
17秒前
害羞的凝竹完成签到 ,获得积分10
17秒前
张玉完成签到,获得积分10
17秒前
开心易真完成签到,获得积分20
19秒前
领导范儿应助有魅力老头采纳,获得10
19秒前
Archer发布了新的文献求助10
19秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
Toward a Combinatorial Approach for the Prediction of IgG Half-Life and Clearance 500
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
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 3969940
求助须知:如何正确求助?哪些是违规求助? 3514642
关于积分的说明 11175298
捐赠科研通 3249947
什么是DOI,文献DOI怎么找? 1795178
邀请新用户注册赠送积分活动 875617
科研通“疑难数据库(出版商)”最低求助积分说明 804891