TITLE

New perspective in degradation mechanism of SrTiO3:Pr,Al,Ga phosphors

AUTHOR(S)
Jin Young Kim; Yong Chan You; Jong Hyuk Kang; Duk Young Jeon; Weber, Jörg
PUB. DATE
September 2004
SOURCE
Journal of Materials Research;Sep2004, Vol. 19 Issue 9, p2694
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Under prolonged electron-beam exposure, perovskite-structured SrTiO3:Pr,Al,Ga (STO) phosphor can be easily reduced due to oxygen loss. In particular, it is well known that dissociative H2O molecules are well adsorbed on reduced STO surfaces. The hydroxyl species produced by such dissociative adsorption of H2O strongly decompose organic compounds chemisorbed on the surface from vacuum ambient used in display devices into carbon species due to the photocatalytic properties of STO. Consequently, it is very likely that this mechanism attributes to the larger amounts of carbon adsorption by electron-stimulated chemical reactions on the STO phosphor surface than other phosphors.
ACCESSION #
14597390

 

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