Open AccessEffects of doping ions on the luminescence performance of terbium doped gadolinium polysulfide phosphor
Author(s) -
Wenhua Zhang,
Huamin Kou,
Lin Ge,
Ying Zhang,
Lin Lin,
Wei Li
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/3/032064
Subject(s) - phosphor , doping , luminescence , terbium , materials science , photoluminescence , gadolinium , ion , analytical chemistry (journal) , lanthanide , quenching (fluorescence) , chemistry , fluorescence , optoelectronics , optics , metallurgy , physics , organic chemistry , chromatography
Gd 2 O 2 S: Tb (GOS) phosphor screen has been widely used in digital X-ray imaging, and so far, numerous studies have been focused on the doping ions to improve the luminescence performance of the GOS phosphors. GOS: Tb, Dy phosphors were synthesized by the solid-state reaction process, and their phase composition, particle size, morphology and luminescence properties were characterized. The results showed that co-doping Dy 3+ can promote the luminescence and the optimal doping concentration of Dy3 + ions were about 0.2%, however concentration quenching will occur when the doping concentration exceeded 0.5%. Ta 5+ ion was also studied in the GOS: Tb and GOS: Tb; Dy phosphors prepared by the same method. The results showed that when the Ta 5+ co-doping concentration was 100ppm, the strongest emitted light intensity would be obtained for both phosphors. The photoluminescence spectra revealed a different influencing mechanism of Ta 5+ ion comparing to Dy 3+ , which is by a strong energy transfer between Dy 3+ and Tb 3+ .