A Model for Emissions from ZnS:Ce^<3+> and SrS:Ce^<3+> Thin-Film Electroluminescent Devices
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概要
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ZnS:CeF_3 thin-film electroluminescent devices are prepared in the vacuum and the oxygen atmosphere by means of an electron-beam evaporation method. The Auger depth profiles for the ZnS films prepared in the oxygen atmosphere show that oxygen substitutes for sulfur. The luminescent decay time for 475 nm and 530 nm emissions of Ce^<3+> ions reveals an increase, particularly in the 530 nm emission when the films are prepared in the oxygen atmosphere. The experimental results suggest that a nonradiative energy transfer via a certain defect occurs in ZnS:Ce^<3+> films. A simple model for emissions from ZnS:Ce^<3+> films is proposed, based on the Auger type-nonradiative energy transfer via sulfur vacancies. The electroluminescent characteristics seen in SrS:Ce^<3+> films are also discussed on the basis of the same mechanism.
- 社団法人応用物理学会の論文
- 1992-12-15
著者
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HAMAKAWA Yoshihiro
Faculty of Engineering Science, Osaka University
-
Sohn Sang
Faculty Of Engineering Science Osaka University
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Hamakawa Yoshihiro
Faculty Of Engineering Science Osaka University
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Hamakawa Yoshihiro
Faculty Of Engineering Osaka University
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