Energy transfer mechanism and luminescence properties of color tunable LaPO4:Tm,Eu phosphor
作者： Su-Hua Yang , Chia-Hung Yen , Che-Min Lin , Po-Jui Chiang
DOI: 10.1016/J.CERAMINT.2015.02.042
关键词:
摘要: Abstract The energy transfer mechanism between Tm 3+ and Eu ions in the phosphate phosphor was investigated. addition of facilitated incorporation O atoms into LaPO 4 :Tm,Eu lattice, which induced changes its ligand field absorption. Excitation transferred from to by dipole–dipole interaction. increase concentration increased probability as well electron transition probabilities ; a color-tunable emission observed through variation concentration. highest efficiency –Eu approximately 93%. critical distance, for transfer, , 14.5 A. luminescence declined with double-exponential mechanism. decay time decreased doping increased.
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