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Green photoluminescence of SrGa 2 S 4 :Sn phosphors
Author(s) -
Nagata Mutsumi,
Okamoto Shinji,
Tanaka Katsu,
Sakai Toshikatsu,
Tamaki Akira
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925225
Subject(s) - phosphor , photoluminescence , ion , excitation , wavelength , photoluminescence excitation , spectral line , emission spectrum , materials science , atomic electron transition , atomic physics , luminescence , analytical chemistry (journal) , green light , optoelectronics , chemistry , physics , blue light , organic chemistry , chromatography , quantum mechanics , astronomy
The phosphor SrGa 2 S 4 :Sn exhibits a new green photoluminescence (PL) whose spectrum peaks at 534 nm. The phosphor also exhibits yellow and orange PL with very broad spectral bands when the excitation wavelength of the UV light is changed. These emissions are caused by the 5p–5s transition in the 5s 2 configuration of Sn 2+ ions occupying Sr 2+ sites. The origin of the green emission was investigated by analyzing the PL excitation spectra and the electronic states of Sn 2+ substituting at three different Sr 2+ sites. The electronic states were analyzed in a first‐principles calculation of the density of states.