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Luminescence properties of Ca 1−x Sr x TiO 3 :Pr 3+
Author(s) -
Park CheolHee,
Jeon CheIk,
Yu ByungYong,
Choi Han,
Bae HyunSook,
Kim ChangHong,
Pyun ChongHong
Publication year - 1998
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 - 10.1889/1.1985210
Subject(s) - phosphor , luminescence , materials science , analytical chemistry (journal) , ion , electric dipole transition , crystal structure , excitation , crystal (programming language) , crystallography , dipole , magnetic dipole , chemistry , physics , optoelectronics , computer science , programming language , organic chemistry , chromatography , quantum mechanics
— The phosphor CaTiO 3 :Pr 3+ is highly regarded as a low‐voltage red phosphor because of its good color quality and intrinsic conductivity. Under 330‐nm excitation it shows red emission, which corresponds to the transition from 1 D 2 to 3 H 4 . This transition is a forbidden f‐f electric dipole transition, but its fluorescence intensity is quite large in CaTiO 3 :Pr 3+ and decreases in Ca 1−x Sr x TiO 3 :Pr 3+ as x increases. In this study, luminescence properties of CaTiO 3 :Pr 3+ have been investigated in terms of crystal structure, using the Eu 3+ ion as a probe. The Pr 3+ ion site in the CaTiO 3 :Pr 3+ has no centrosymmetry, and the partial allowance of the 1 D 2 → 3 H 4 transition by the odd crystal‐field terms due to the loss of centrosymmetry gives quite strong emission. With the increase of the Sr ion substitution in Ca 1−x Sr x TiO 3 :Pr 3+ prepared by heating at 1150°C, the fraction of the Pr 3+ ions at inversion centers increases and the emission intensity decreases as the result.