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Ce3+ → Eu2+ energy transfer mechanism in the Li2SrSiO4:Eu2+, Ce3+ phosphor

✍ Scribed by Hong He; Renli Fu; Yongge Cao; Xiufeng Song; Zhengwei Pan; Xinran Zhao; Qingbo Xiao; Ran Li

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
572 KB
Volume
32
Category
Article
ISSN
0925-3467

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✦ Synopsis

Ce 3+ /Eu 2+ co-doped Li 2 SrSiO 4 phosphor yields two emission bands consisted of blue and yellow components, which shows great potential as single host white phosphor for white LEDs. Effective energy transfer occurs in Ce 3+ /Eu 2+ co-doped Li 2 SrSiO 4 due to large spectral overlap between the emission of Ce 3+ and excitation of Eu 2+ . Co-doping of Ce 3+ enhances the emission intensity of Eu 2+ greatly by transferring its excitation energy to Eu 2+ . The Ce 3+ ? Eu 2+ energy transfer, thoroughly investigated by their absorption, excitation and photoluminescence decay behaviors, is demonstrated to be in the mechanism of electric dipole-dipole interaction.

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