广色域背光源用绿色荧光粉β-SiAlON:Eu^(2+)的研究进展  

Recent Progress of Green Phosphor β-SiAlON:Eu^(2+) Used for Wide-Color Gamut Displays

作　　者：张学杰[1] 刘如熹[1] 

机构地区：[1]台湾大学化学研究所,台北10617

出　　处：《中国稀土学报》2016年第6期667-674,共8页Journal of the Chinese Society of Rare Earths

基　　金：台湾科技部基金资助项目(MOST 104-2113-M-002-012-MY3&MOST 104-2119-M-002-027-MY3)

摘　　要：白光LED已经广泛应用于LCD背光显示领域,然而,如何实现更广色域的显示,成为目前新的问题与研究热点。由于液晶背光源通常都使用滤光片,以期获得更广的色域范围和发光效率,因此若能使绿光荧光粉产生窄带发射,则可显著扩大背光源的色域面积。通过采用"蓝光LED芯片+β-SiAlON:Eu^(2+)(λem=525nm;FWHM^50nm)绿色荧光粉+K_2SiF_6:Mn^(4+)红色荧光粉"的封装方案能够实现目前基于荧光粉技术的最大色域面积。对于β-SiAlON:Eu^(2+)荧光粉而言,仍然对其发光性质缺乏清晰的认识。本文简要地总结了近年来β-SiAlON:Eu^(2+)绿色荧光粉的研究进展,分析其结构与光谱之间的关系,以期为能够实现更窄谱带、更高发光效率的β-SiAlON:Eu^(2+)绿色荧光粉提供思路,最终实现更广色域显示的目的。White light-emitting diodes （LEDs） have been widely used in the field of liquid crystal displays （LCD） as the backlight source. However, how to achieve a wider color gamut display is becoming the new issues and research focus. The sensitivity of human eye is higher in the green region, hence, the color gamut is significantly increased if the green phosphor with a narrow bandwidth is used in the phosphor-converted LEDs. Through the method of ＂blue LED chip and β-SiAlON：Eu^2＋ （λem = 525 nm; FWHM - 50 nm） green phosphor ＋ K2SiF6 ：Mn^4＋ red phosphor＂, one can achieve the wide-color gamut. Unfortunately, as for β-SiAlON：Eu^2＋ phosphor, we are still lacking of clear understanding. This article briefly summarized the recent progress of β-SiAlON：Eu^2＋ green phosphor, and analyzed the relationship between the structure and the luminescence properties, which could give a guideline for exploring a narrower bandwidth and higher emission efficiency β-SiAlON：Eu^2＋ green phosphor.

关 键 词：绿色荧光粉 广色域 发光机制 β-SiAlON:Eu^2+ 

分 类 号：TQ422[化学工程]