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Transparent Y 2 O 2 S:Eu 3+ phosphor thin films grown by reactive evaporation and their luminescent properties
Author(s) -
Daud Alias,
Futaki Hisanori,
Ohmi Koutoku,
Tanaka Shosaku,
Kobayashi Hiroshi
Publication year - 1996
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985015
Subject(s) - phosphor , thin film , luminescence , photoluminescence , materials science , evaporation , analytical chemistry (journal) , crucible (geodemography) , ion , molecule , crystallography , chemistry , nanotechnology , optoelectronics , physics , computational chemistry , organic chemistry , chromatography , thermodynamics
— Transparent Y 2 O 2 S:Eu 3+ phosphor thin films have been grown by a reactive evaporation method. Y metal vaporized by electron‐beam irradiation was allowed to react with SO 2 gas molecules. Eu was simultaneously supplied from a resistively heated crucible containing EuCl 3 powder. By employing a heated W filament and an ac plasma cell to excite (crack) the SO 2 molecules, Y 2 O 2 S:Eu 3+ thin films and thin films containing both Y 2 O 3 and Y 2 O 2 S phases which showed intense red photoluminescence were obtained. These results suggest that the films obtained are crystallized and Eu 3+ ions substitute for Y ions in the Y 2 O 3 and Y 2 O 2 S lattices and hence form luminescent centers.