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Identification of charge‐transfer transition between Gd 3+ to O 2− in gadolinium‐containing oxide phosphors in VUV region
Author(s) -
Wang Yu Hua,
Endo Tadashi,
Guo Xuan,
Murakami Yukio,
Ushirozawa Mizumoto
Publication year - 2004
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 - 10.1889/1.1847753
Subject(s) - europium , gadolinium , phosphor , materials science , excitation , analytical chemistry (journal) , doping , praseodymium , absorption band , absorption spectroscopy , emission spectrum , spectral line , luminescence , chemistry , optics , optoelectronics , physics , chromatography , quantum mechanics , metallurgy , astronomy
— The broad bands at around 155 nm for GdAl 3 (BO 3 ) 4 :Eu, at 184 nm for Ca 4 GdO(BO 3 ) 3 :Eu, at 183 nm for Gd 2 SiO 5 :Eu, and at 170 nm for GdAlO 3 :Eu were observed. These bands were assigned to the charge‐transfer (CT) transition of Gd 3+ ‐O 2− . In the excitation spectrum of (Gd,Y)BO 3 :Eu, a broadened excitation band was observed in VUV region. It could be considered that this band was composed of two bands at about 160 and 166 nm. The preceding band was assigned to the BO 3 group absorption. The later one at about 166 nm could be assigned to the CT transition of Gd 3+ ‐O 2− , according to the result of GdAl 3 (BO 3 ) 4 :Eu, Ca 4 GdO(BO 3 ) 3 :Eu, Gd 2 SiO 5 :Eu, and GdAlO 3 :Eu. The excitation spectra overlapped between the CT transition of Gd 3+ ‐O 2− and BO 3 groups absorption. It caused the emission of Eu 3+ to take place effectively in the trivalent europium‐doped (Gd,Y)BO 3 host lattice under 147‐nm excitation.