Unique Spectral Overlap and Resonant Energy Transfer between Europium(II) and Ytterbium(III) Cations: No Quantum Cutting
Unique Spectral Overlap and Resonant Energy Transfer between Europium(II) and Ytterbium(III) Cations: No Quantum Cutting
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铕 (II) 和镱 (III) 阳离子之间独特的光谱重叠和共振能量转移：无量子切割
DOI：
10.1002/anie.201703331
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Liang Hongbin
中科院分区：
文献类型：
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作者：
Zhou Lei;Tanner Peter A;Zhou Weijie;Ai Yeye;Ning Lixin;Wu Mingmei M;Liang Hongbin
采用溶胶-凝胶燃烧法在还原条件下合成了Eu 2+、Yb 3+单掺、Eu 2+和Yb 3+双掺以及Ce 3+、Eu 2+和Yb 3+三掺的Ca 3Sc 2Si 3 O 12（CSS）基质样品。与以往报道的Eu 2 +→ Yb 3+的能量转移不同，在CSS基质中能量转移是共振的，轻掺杂样品的能量转移效率达到100%。对于本文所用的样品组合物，转移机制是多极的而不是电子转移。Yb 3+的发射强度通过除了Eu 2+之外还与Ce 3+共掺杂而进一步增强。掺杂材料的量子效率在9%和93%之间。
Samples of the Ca3Sc2Si3O12(CSS) host singly doped with Eu2+or Yb3+, doubly doped with Eu2+and Yb3+, and triply doped with Ce3+, Eu2+and Yb3+were synthesized by a sol–gel combustion process under reducing conditions. Unlike previous reports of Eu2+→Yb3+energy transfer in other systems, the energy transfer is resonant in the CSS host and the transfer efficiency reaches 100 % for lightly doped samples. The transfer mechanism is multipolar rather than electron transfer for the sample compositions employed herein. The emission intensity of Yb3+is further enhanced by co‐doping with Ce3+in addition to Eu2+. The quantum efficiencies of the doped materials range between 9 % and 93 %.