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Characteristics of Strontium Aluminate Crystals Used for Long‐Duration Phosphors
Author(s) -
Katsumata Tooru,
Sasajima Kazuhito,
Nabae Takehiko,
Komuro Shuji,
Morikawa Takitaro
Publication year - 1998
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.1151-2916.1998.tb02349.x
Subject(s) - phosphorescence , phosphor , persistent luminescence , materials science , ion , mineralogy , doping , aluminate , analytical chemistry (journal) , luminescence , fluorescence , chemistry , optics , thermoluminescence , physics , organic chemistry , optoelectronics , metallurgy , cement
Sr 3 Al 2 O 6 , SrAl 2 O 4 , SrAl 4 O 7 , and SrAl 12 O 19 that have been doped with Eu 2+ and Dy 3+ ions have been grown by a floating‐zone technique for application as long‐duration phosphors. Long‐duration phosphorescence with a variety of colors has been observed in SrA l2 O 4 , SrAl 4 O 7 , and SrAl 12 O 19 crystals that have been doped with Eu 2+ and Dy 3+ ions. The peak wavelength of the phosphorescence is 520 nm for SrAl 2 O 4 , 480 nm for SrAl 4 O 7 , and 400 nm for SrAl 12 O 19 . The phosphorescence is characterized by decay times that have been analyzed by a curve‐fitting technique.