一种新型可调谐的绿到黄发射β-YFS:Ce³+ 荧光粉用于固态照明。

A novel tunable green- to yellow-emitting β-YFS:Ce³+ phosphor for solid-state lighting.

机构信息

Phosphors Research Laboratory, Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 30010, Taiwan.

出版信息

ACS Appl Mater Interfaces. 2011 Aug;3(8):3195-9. doi: 10.1021/am2006965. Epub 2011 Jul 18.

DOI:10.1021/am2006965

PMID:21732602

Abstract

A Ce(3+)-activated fluorosulfide phosphor (β-YFS:Ce(3+)) was synthesized by solid-state reaction in a sealed tube. The crystal structure has been refined from the XRD profiles and there are two different crystallographic rare earth sites, namely, Y(1) and Y(2), where the Ce(3+) ions occupied. The emission band with a maximum at 495 nm of β-Y(0.99)Ce(0.01)FS phosphor was characterized by the 4f-5d transitions of Ce(3+) ion. With increasing Ce(3+) concentration, the emission variations were observed from 495 to 547 nm. When β-YFS:Ce(3+) phosphors were utilized to incorporate with n-UV/blue chip, greenish-white light with color rendering index of 65-77 were obtained. The results indicate that the tunable green- to yellow-emitting β-YFS:Ce(3+) can serve as a potential phosphor for incorporation in fabrication for solid-state lighting. The preparation, spectroscopic characterization, quantum efficiency, thermal-quenching behavior, and related LED device data are also presented.

摘要

通过固态反应在密封管中合成了一种 Ce(3+)-激活的氟硫化物荧光粉（β-YFS:Ce(3+)）。从 XRD 图谱中精修了晶体结构，存在两个不同的晶体学稀土位，即 Y(1)和 Y(2)，Ce(3+)离子占据其中。β-Y(0.99)Ce(0.01)FS 荧光粉的发射带在 495nm 处具有最大值，由 Ce(3+)离子的 4f-5d 跃迁产生。随着 Ce(3+)浓度的增加，观察到发射从 495nm 到 547nm 的变化。当β-YFS:Ce(3+)荧光粉与 n-UV/蓝光芯片结合使用时，获得了显色指数为 65-77 的绿白色光。结果表明，可调谐的绿黄色发射β-YFS:Ce(3+)可作为一种潜在的荧光粉，用于制造固态照明。还介绍了其制备、光谱特性、量子效率、热猝灭行为以及相关的 LED 器件数据。