Abstract
The observation of energy transfer from host to rare earth ions in Pr 3+-doped CdSiO 3 long-lasting phosphor is reported in this Letter. The important role of persistent energy transfer from the CdSiO 3 host to the Pr 3+ is demonstrated experimentally through photoluminescence spectra, time-resolved emission spectra and fluorescence decay curves. A significant spectral overlap between the emission of host and the absorption of Pr 3+ (4d–5f) has been observed. By utilizing the principle of energy transfer, a promising approach for controlling the color-emitting is proposed to develop the multi-color long-lasting phosphors via persistence energy transfer from the long-lasting luminescent host to rare earth ions.
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