Photoluminescence properties of ZnGa2O4:Mn powder phosphors
作者:
T. K. Tran,
W. Park,
J. W. Tomm,
B. K. Wagner,
S. M. Jacobsen,
C. J. Summers,
P. N. Yocom,
S. K. McClelland,
期刊:
Journal of Applied Physics
(AIP Available online 1995)
卷期:
Volume 78,
issue 9
页码: 5691-5695
ISSN:0021-8979
年代: 1995
DOI:10.1063/1.359627
出版商: AIP
数据来源: AIP
摘要:
The results of a systematic photoluminescence study of ZnGa2O4:Mn powder phosphor are reported. At room temperature this phosphor exhibits bright green luminescence with a spectral peak at 2.46 eV and Commission International de l’Eclairage chromaticity coordinates ofx=0.073 andy=0.696. At low temperatures the luminescence was found to consist of three components assigned to the4T1–6A1inner transition of the 3delectrons of Mn2+ions located on three different sites of the host crystal. Selective excitation and lifetime measurements were used to investigate the assignment of these features. The photoluminescence lifetime showed a single exponential decay of about 4 ms and atT=1.6 K an optical‐phonon‐related fine structure [Ephonon=(8.2±0.2) meV] of the main photoluminescence line was observed. ©1995 American Institute of Physics.
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