Long Phosphorescence Persistence Property of Cd2Ge7O16:Pb2+

Abstract

Abstract: Cd2Ge 7O16 :Pb²⁺ was prepared by the high temperature solid state method. The material is a single phase. From the emission spectra and excitation spectra of Cd₂Ge₇O₁₆:Pb²⁺ and Cd 2Ge 7O 16,it can be seen that the luminescence of Cd₂Ge₇O₁₆:Pb²⁺ is due to the 3 P 1- 1 S 0 transitions of Pb²⁺ ions, the peak at 497 nm of Cd₂Ge₇O₁₆:Pb²⁺ doped with 2%Pb²⁺ in molar fraction is the best, and the host Cd₂Ge₇O₁₆can transfer energy to Pb²⁺ . Long afterglow property of Cd₂Ge₇O₁₆:Pb²⁺ is due to the hole trap of Cd₂Ge₇O₁₆:Pb²⁺ and the hole trap can trap hole,so afterglow luminescence appears. A mode of afterglow mechanism was proposed.

Key words: Cd₂Ge₇O₁₆, Luminescence, Long afterglow, Energy transfer

CLC Number:

O614

TrendMD:

YI Shou-Jun, LIU Ying-Liang, ZHANG Jing-Xian, YUAN Ding-Sheng . Long Phosphorescence Persistence Property of Cd₂Ge₇O₁₆:Pb²⁺[J]. Chem. J. Chinese Universities, 2004, 25(8): 1400.

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Long Phosphorescence Persistence Property of Cd₂Ge₇O₁₆:Pb²⁺

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