Open AccessTemperature dependent red luminescence from a distorted Mn^4+ site in CaAl_4O_7:Mn^4+
Author(s) -
Pengfei Li,
Mingying Peng,
Xuewen Yin,
Zhijun Ma,
Guoping Dong,
Qinyuan Zhang,
Jianrong Qiu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.018943
Subject(s) - phosphor , luminescence , materials science , quenching (fluorescence) , octahedron , cathodoluminescence , boron , atmospheric temperature range , analytical chemistry (journal) , optics , optoelectronics , crystal structure , fluorescence , crystallography , chemistry , physics , chromatography , meteorology , organic chemistry
Thermal luminescence quenching behavior of a phosphor is essential for application in phosphor converted white light emitting diodes (pc-WLEDs) because the phosphor layer can be heated up to 473K in a working high power WLEDs. Here, we have confirmed indeed a red luminescence of Mn(4+) substituting for calcium sites rather than tetrahedral aluminum sites in CaAl(4)O(7):Mn which can be synthesized in pure phase even with boron acid as flux, and examined the low and high temperature luminescent properties in the range of 10 to 500K. We have revealed as well as thermal quenching mechanism that distorted octahedral Mn(4+) sites suffer severe thermal quenching. This work, thus, hints a strategy to find a new Mn(4+) phosphor with better resistance to thermal impact in the future.