荧光粉
色域
背光
材料科学
色温
显色指数
光电子学
NTSC公司
光致发光
发光二极管
二极管
发光测量
LED灯
液晶显示器
发光
光学
物理
高清电视
电信
计算机科学
作者
Jingshan Hou,Wenxiang Yin,Langping Dong,Yang Li,Yufeng Liu,Zhifu Liu,Guoying Zhao,Ganghua Zhang,Yongzheng Fang
出处
期刊:Materials
[MDPI AG]
日期:2021-09-15
卷期号:14 (18): 5317-5317
被引量:19
摘要
In this work, a novel red-emitting oxyfluoride phosphor Na2NbOF5:Mn4+ with an ultra-intense zero-phonon line (ZPL) was successfully synthesized by hydrothermal method. The phase composition and luminescent properties of Na2NbOF5:Mn4+ were studied in detail. The photoluminescence excitation spectrum contains two intense excitation bands centered at 369 and 470 nm, which match well with commercial UV and blue light-emitting diode (LED) chips. When excited by 470 nm blue light, Na2NbOF5:Mn4+ exhibits red light emission dominated by ZPL. Notably, the color purity of the Na2NbOF5:Mn4+ red phosphor can reach 99.9%. Meanwhile, the Na2NbOF5:Mn4+ phosphor has a shorter fluorescence decay time than commercial K2SiF6:Mn4+, which is conducive to fast switching of images in display applications. Profiting from the intense ZPL, white light-emitting diode (WLED) with high color rendering index of Ra = 86.2 and low correlated color temperature of Tc = 3133 K is realized using yellow YAG:Ce3+ and red Na2NbOF5:Mn4+ phosphor. The WLED fabricated using CsPbBr3 quantum dots (QDs) and red Na2NbOF5:Mn4+ phosphor shows a wide color gamut of 127.56% NTSC (National Television Standard Committee). The results show that red-emitting Na2NbOF5:Mn4+ phosphor has potential application prospects in WLED lighting and display backlight.
科研通智能强力驱动
Strongly Powered by AbleSci AI