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Luminescence Properties of SrO–Al 2 O 3 :Eu 2+ ,Dy 3+ Prepared at Different Temperatures
Author(s) -
Nagamani Suriyamurthy,
Panigrahi Bhabani Shankar
Publication year - 2010
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.1551-2916.2010.03938.x
Subject(s) - phosphor , photoluminescence , annealing (glass) , luminescence , materials science , analytical chemistry (journal) , afterglow , x ray crystallography , persistent luminescence , diffraction , thermoluminescence , mineralogy , crystallography , chemistry , optics , metallurgy , physics , optoelectronics , gamma ray burst , chromatography , astronomy
The photoluminescence (PL) and afterglow (AGL) characteristics of SrO–Al 2 O 3 :Eu 2+ ,Dy 3+ phosphors are studied here. This phosphor was synthesized through solid‐state route with two different precursor materials. At the synthesis/annealing temperature of 1200°C and above, the phosphor prepared through either route exhibited similar PL and AGL emission. However, at different synthesis/annealing temperatures below 1200°C, the phosphor exhibited PL and AGL emissions at different wavelengths. X‐ray diffraction studies revealed the formation of different intermediate compounds like SrAl 4 O 7 and SrAl 2 O 4 to varying extent at different temperatures below 1200°C. The observed difference between the AGL and PL emission maxima is rationalized based on the presence of intermediate compounds and also on the diffusion of Eu and Dy in the sample matrices.