Afterglow and Energy Transfer from Ti to Eu3+ in Y2O2S:0.03Eu,0.03Ti Phosphor

doi:10.3724/SP.J.1077.2006.00329

Abstract

Abstract:

A new kind of orange-red long afterglow Eu and Ti co-doped Y₂O₂S phosphor was synthesized via a traditional solid state reaction method under reducing atmosphere of CO. The photoluminescence spectrum, afterglow time-resumed spectrum and afterglow decay curve of the Y2O2S:0.03Ti,0.03Eu phosphors were measured. The result shows that the emission spectrum of Y2O2S:0.03Ti,0.03Eu consists of a group of narrow linear peaks from charge transmission of Eu3+. The orange-red afterglow was observed in present phosphors with two different luminescence centers: a broad yellow emission band around 565nm related to Ti emission and a group of narrow peaks of Eu3+ emission in the longer wavelength range. The afterglow mechanism of Eu3+ emission was suggested to come from the energy transfer process from Ti afterglow emission to Eu ions, and result in two different afterglow centers of Ti afterglow emission and Eu{3+} afterglow emission in present Y2O2S:0.03Ti,0.03Eu phosphor.

Key words: afterglow, energy transfer, phosphor, photoluminescence, rare earth

HONG Zhang-Lian,ZHANG Peng-Yue,HUANG Qiu-Ping,FAN Xian-Ping,WANG Min-Quan. Afterglow and Energy Transfer from Ti to Eu³⁺ in Y₂O₂S:0.03Eu,0.03Ti Phosphor[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2006.00329.

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Afterglow and Energy Transfer from Ti to Eu³⁺ in Y₂O₂S:0.03Eu,0.03Ti Phosphor

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