Tunable luminescence of Ce³⁺/Mn²⁺-coactivated Sr₃Gd(PO₄)₃ with efficient energy transfer for white-light-emitting diode

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• 作者：Jiayue Sun ; ^{jiayue_sun@126.com} ; Junhui Zeng ; Yining Sun ; Haiyan Du
• 关键词：Chemical synthesis ; Energy transfer ; Optical properties ; w-LEDs
• 刊名：Journal of Luminescence
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：138
• 期：Complete
• 页码：72-76
• 全文大小：982 K

文摘

A series of new luminescent emission-tunable phosphors Sr₃Gd(PO₄)₃(SGP):0.006Ce³⁺, xMn²⁺ have been synthesized by a high-temperature solid-state reaction. The energy transfer from Ce³⁺ to Mn²⁺ in SGP:Ce³⁺/Mn²⁺ phosphors has been validated and demonstrated to be a resonant type via a dipole-quadrupole mechanism based on the decay lifetime data, and the critical distance (R_C) calculated by quenching concentration method and spectral overlap method are 25.24 and 24.26 ?, respectively. Tuning the Ce³⁺/Mn²⁺ ratio via the energy transfer varied the emission hue of from blue to white-light and eventually to yellow. These results indicate that the developed phosphor may be promising as a single-component white-light-emitting phosphor for white LEDs.