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Enhancement of Photoluminescence and Color Purity of CaTiO 3 : Eu Phosphor by Li Doping
Author(s) -
Wu YunFang,
Nien YungTang,
Wang YiJhang,
Chen InGann
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04967.x
Subject(s) - photoluminescence , phosphor , chromaticity , doping , materials science , analytical chemistry (journal) , luminescence , chemistry , optoelectronics , optics , physics , chromatography
High color purity red phosphors of Ca 1−3/2 x Eu x TiO 3 and Ca 1−2 x Eu x Li x TiO 3 (0 < x ≤ 0.3) are synthesized via a solid‐state reaction method. The red emission photoluminescence intensity and color purity are enhanced by the incorporation of Li + into CaTiO 3 : Eu 3+ . The Li + doping increases the emission probability from 5 D 0 state, increases photoluminescence intensity by 1.6 times, increases color purity to 92.1%, and shortens the decay time. With increasing Eu 3+ and Li + content, the color coordinates approach the ideal red chromaticity values, coming closer than commercial Y 2 O 2 S:Eu 3+ red phosphor.