Tunable emitting-color and energy transfer of KCaY(PO4)2: Ce3+,Tb3+ phosphors for UV-excited white light-emitting-diodes
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- 作者：Tingming Jiang ; Xue Yu ; Xuhui Xu ; Hongling Yu ; Dacheng Zhou ; Jianbei Qiu
- 关键词：D. Phosphors ; A. Optical materials ; D. Luminescence ; D. Optical properties
- 刊名：Materials Research Bulletin
- 出版年：March, 2014
- 年：2014
- 卷：51
- 期：Complete
- 页码：80-84
- 全文大小：1324 K
文摘
A series of new luminescence emission-tunable phosphors KCaY(PO4)2: 0.03Ce3+, yTb3+ have been synthesized by high temperature solid-state reaction method. Under ultraviolet light excitation, KCaY(PO4)2: 0.03Ce3+, yTb3+ can achieve tunable emission from deep blue to yellowish-green by changing the concentration of Tb3+. The efficient energy transfer process from Ce3+ to Tb3+ ions was observed and confirmed in terms of corresponding excitation, emission spectra and photoluminescence decay curves, which the efficiency is above 80%. In addition, the energy transfer mechanism from Ce3+ to Tb3+ was proved to be dipole-dipole interaction in KCaY(PO4)2 host. By utilizing the principle of energy transfer and appropriate tuning of Ce3+/Tb3+ contents, KCaY(PO4)2: 0.03Ce3+, yTb3+ can realize emission color tunable and have potential application as an UV-convertible phosphor in white light-emitting diodes.