Tunable emission and efficient energy-transfer properties of Ce3+ and Mn2+ co-doped Ba3Gd(PO4)3 phosphors
Tunable emission and efficient energy-transfer properties of Ce3+ and Mn2+ co-doped Ba3Gd(PO4)3 phosphors
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DOI：
10.1007/s00339-014-8301-y
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
Ren Chen;Yihua Hu;Yahong Jin;Li Chen;Xiaojuan Wang
中科院分区：
文献类型：
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作者：
Ren Chen;Yihua Hu;Yahong Jin;Li Chen;Xiaojuan Wang
采用传统的高温固相反应法制备了Ba3Gd(PO4)3：Ce3+，Mn2+可调谐发光材料。系统地研究了Ce3+和Mn2+共掺Ba3Gd(PO4)3荧光粉的光致发光特性和能量转移。通过有效的能量传递过程，所得到的荧光粉在紫外光(~310 nm)激发下表现出双发射，包括由Ce3+发出的紫外光(UV)到蓝光的发射和由Mn2+发出的橙红色的红光。当Ce3+掺杂量固定为0.05时，通过将Mn2+掺杂量从0.01调整到0.5，可以将发射色调从蓝色调整到红紫色，最终调整到红色区域。计算出Ce3+和Mn2+之间的临界距离为12.23°。实验发现，Mn2+的浓度猝灭为0.3。讨论了Ce3+和Mn2+离子之间的能量传递效率，证明了Ce3+和Mn2+离子之间的电子转移机制为偶极-偶极相互作用。Ce3+和Mn2+共掺的Ba3Gd(PO4)3荧光粉是紫外白光LED中Ce3+到Mn2+离子能量传递的潜在候选材料。
The tunable emission color phosphors Ba3Gd(PO4)3: Ce3+, Mn2+were synthesized by conventional high-temperature solid-state reaction method. The photoluminescence properties and energy transfer (ET) of the Ce3+and Mn2+co-doped Ba3Gd(PO4)3phosphors were studied systematically. Through an efficient energy-transfer process, the obtained phosphors show both dual-emission including a ultraviolet (UV) to blue emission originating from Ce3+and a reddish-orange emission from Mn2+under UV excitation (~310 nm) with considerable intensity. When the Ce3+doping content is fixed at 0.05, the emission color tone can be adjusted from blue through reddish-purple and ultimately to red region by tuning the contents of Mn2+from 0.01 to 0.5. The critical distance between Ce3+and Mn2+was calculated to be 12.23 Å. The concentration quenching of Mn2+was experimentally found to be 0.3. The energy-transfer efficiency was discussed and the ET mechanism between Ce3+and Mn2+ions was proved to be dipole–dipole interaction. The Ce3+and Mn2+co-doped Ba3Gd(PO4)3phosphors are potential UV-convertible candidates in UV white-light LEDs for the energy transfer from Ce3+to Mn2+ions.