在发光二极管背光源上极具应用前景的Beta-sialon(Si6-zAlzOzN8-z):Eu2+窄带绿色荧光粉

引用本文: 解荣军, 周天亮, 高桥向星, 广崎尚登. 在发光二极管背光源上极具应用前景的Beta-sialon(Si_6-zAl_zO_zN_8-z):Eu²⁺窄带绿色荧光粉[J]. 应用化学, 2016, 33(8): 855-866. doi: 10.11944/j.issn.1000-0518.2016.08.160240 shu

Citation: XIE Rongjun, ZHOU Tianliang, TAKAHAHIS Kohei, HIROSAKI Naoto. Beta-Sialon(Si_6-zAl_zO_zN_8-z):Eu²⁺: A Promising Narrow-band Green Phosphor for Light-emitting Diode Backlights[J]. Chinese Journal of Applied Chemistry, 2016, 33(8): 855-866. doi: 10.11944/j.issn.1000-0518.2016.08.160240 shu

在发光二极管背光源上极具应用前景的Beta-sialon(Si_6-zAl_zO_zN_8-z):Eu²⁺窄带绿色荧光粉

1.
a 厦门大学材料学院厦门 361005;
2.
b 日本国立材料研究所日本筑波 305-0044

通讯作者: 解荣军,教授; Tel:0592-2184084; E-mail:rjxie@xmu.edu.cn; 研究方向:稀土发光材料、陶瓷材料、固态照明

基金项目:
国家自然科学基金（51572232,51561135015)

宁波市重大科技攻关项目（2011B1001）资助

摘要: 基于氮化镓的白光发光二极管(LED)是目前一项崭新的背光源技术，广泛应用于宽色域、高光效的液晶显示屏。在此项技术中，作为关键材料的荧光粉决定着背光单元的色域范围、发光效率和可靠性，因而要求它应具合适的发射波长和窄带发射。β-sialon：Eu²⁺(sialon：silicon aluminum oxynitride(赛龙))就是一款非常适合背光应用的绿色荧光粉，这得益于其位于525~545 nm发射峰和只有55 nm狭窄的峰宽。此文回顾和综述了β-sialon：Eu²⁺的合成方法、光谱特性、电子结构、晶体结构、可靠性和它的具体应用。计算模拟和实验测试结果表明，Eu²⁺位于沿c轴方向的大孔道之中，并与6个最紧邻的(O,N)原子等距离配位。因而，Eu²⁺的狭窄发射峰源自于Eu²⁺局域结构的高度对称性。β-sialon：Eu²⁺的发射波长和带宽都能通过组成裁剪，即z值，进行调控；低z值组成能够实现更短波长发射和更窄带宽。与传统的基于钇铝石榴石(YAG)荧光粉的背光源相比，β-sialon：Eu²⁺再搭配红色荧光粉制备的背光源具有更宽的色域，色域范围可提高15%以上。其优异的发光性能和高可靠性使得β-sialon：Eu²⁺成为应用于先进显示屏的极其重要的绿色发光材料。

关键词:

English

Beta-Sialon(Si_6-zAl_zO_zN_8-z):Eu²⁺: A Promising Narrow-band Green Phosphor for Light-emitting Diode Backlights

1.
a College of Materials, Xiamen University, Xiamen, Fujian 316005, China;
2.
b Sialon Group, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan

Corresponding author: 解荣军,教授; Tel:0592-2184084; E-mail:rjxie@xmu.edu.cn; 研究方向:稀土发光材料、陶瓷材料、固态照明

Received Date: 07 June 2016
Fund Project:
国家自然科学基金（51572232,51561135015)

宁波市重大科技攻关项目（2011B1001）资助

Abstract: GaN-based white light-emitting diode(LED) is now an emerging backlight technology for large color gamut and high efficiency liquid crystal displays. In this technology, phosphors are key materials to control the color-space coverage, luminous efficiency, and lifetime of the backlight units, which are required to have a desired emission and a narrow emission band. β-Sialon:Eu²⁺(sialon:silicon aluminum oxynitride, Si_6-zAl_zO_zN_8-z) is such a green phosphor because it has an emission band centered at 525~545 nm and a small band width(~55 nm). This contribution overviews the synthesis, luminescence, electronic and crystal structure, reliability and applications of β-sialon:Eu²⁺. From both structure calculations and experimental observations, Eu²⁺ is seen to be accommodated into a large void along the c-axis, and coordinated to six nitrogen/oxygen atoms at an equivalent distance. The narrow emission band is thus ascribed to the high symmetry of the local structure of Eu²⁺. Both of the emission band and the band width of β-sialon:Eu²⁺ can be tuned by tailoring the composition(e.g., the z value), and β-sialon:Eu²⁺ with shorter wavelengths and narrower bands can be achieved at lower z values. Combined with other red phosphors, β-sialon:Eu²⁺ enables to produce wider color gamut backlights(15% up) than the conventional yttrium aluminum garnet(YAG)-based ones. Both the excellent luminescence properties and reliability make β-sialon:Eu²⁺ to be an extremely important green phosphor for use in advanced displays.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

在发光二极管背光源上极具应用前景的Beta-sialon(Si_6-zAl_zO_zN_8-z):Eu²⁺窄带绿色荧光粉

通讯作者: 解荣军,教授; Tel:0592-2184084; E-mail:rjxie@xmu.edu.cn; 研究方向:稀土发光材料、陶瓷材料、固态照明

English

Beta-Sialon(Si_6-zAl_zO_zN_8-z):Eu²⁺: A Promising Narrow-band Green Phosphor for Light-emitting Diode Backlights

Corresponding author: 解荣军,教授; Tel:0592-2184084; E-mail:rjxie@xmu.edu.cn; 研究方向:稀土发光材料、陶瓷材料、固态照明

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