The energy transfer from Eu2+ to Tb3+ in calcium chlorapatite phosphor and its potential application in LEDs |
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Authors: | Z Zhang J Wang M Zhang Q Zhang Q Su |
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Institution: | 1. MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, Guangdong, 510275, P.R. China
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Abstract: | Energy transfer from Eu2+ to Tb3+ was observed by investigating the optical properties from photoluminescence spectra and decay time curves in Tb3+ singly doped and Eu2+–Tb3+ co-doped calcium chlorapatite, Ca5(PO4)3Cl (CPCl). It is dominated by the cooperation of a phonon-assisted energy transfer process and a non-radiative resonant energy transfer process caused by the exchange interaction. Eu2+–Tb3+ co-doped calcium chlorapatite phosphors in which Tb3+ can be efficiently excited by 400 nm are potential candidates for phosphor-converted LED. |
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