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The Luminescence Characterization and Thermal Stability of Eu 2+ Ions‐Doped NaBaPO 4 Phosphor
Author(s) -
Zhang Suyin,
Huang Yanlin,
Nakai Yosuke,
Tsuboi Taiju,
Seo Hyo Jin
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04481.x
Subject(s) - luminescence , phosphor , photoluminescence , ion , doping , materials science , quenching (fluorescence) , thermal stability , analytical chemistry (journal) , crystal structure , crystal (programming language) , chemistry , crystallography , fluorescence , optoelectronics , optics , physics , programming language , organic chemistry , chromatography , computer science
The Eu 2+ ‐doped NaBaPO 4 phosphor was prepared by high‐temperature solid‐state reaction. The photoluminescence excitation and emission spectra and the luminescence quantum efficiency of Eu 2+ ions were investigated. The dependence of luminescence intensity on temperatures and the temperature‐dependent decay times of Eu 2+ ions doped in NaBaPO 4 were measured and discussed. The natures of the Eu 2+ emission in NaBaPO 4 , e.g., the Stokes shift, the luminescence quenching temperature ( T 0.5 ), the activation energy for thermal quenching (δ E ) were reported. In addition, the crystal structure and the site occupancy of Eu 2+ ions doped in NaBaPO 4 crystal lattice were discussed. Two different Eu 2+ centers were assigned according to the crystal structure and the luminescence characteristics of Eu 2+ ions. The phosphor shows an excellent thermal stability on temperature quenching effects. With the increasing of temperature, the emission bands show the abnormal blue‐shift.