Negative thermal expansion and broad band photoluminescence in a novel material of ZrScMo2VO12.
Negative thermal expansion and broad band photoluminescence in a novel material of ZrScMo2VO12.
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ZrScMo2VO12 新型材料的负热膨胀和宽带光致发光
DOI：
10.1038/srep24832
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发表时间：
2016-04-21
影响因子：
4.6
通讯作者：
Liang E
中科院分区：
文献类型：
--
作者：
Ge X;Mao Y;Liu X;Cheng Y;Yuan B;Chao M;Liang E
本文首次提出了一种新的材料ZrScMo 2 VO 12。结果表明，这种材料不仅表现出良好的负热膨胀（NTE）性能在很宽的温度范围内（至少从150至823 K），但也非常强烈的光致发光覆盖整个可见光区。结构分析表明，室温下ZrScMo 2 VO 12为正交晶系，空间群为PbCN（No.60）。还揭示了从单斜晶系到正交晶系结构之间的相变70和90 K。强烈的白色光发射初步归因于n型和p型共掺杂效应，该效应不仅在带隙中产生了施主和受主态，而且还产生了施主-受主对，甚至是束缚激子复合物。该材料具有良好的NTE性能和强烈的白光发射，在发光二极管和其它光电器件中具有潜在的应用前景。
In this paper, we present a novel material with the formula of ZrScMo2VO12for the first time. It was demonstrated that this material exhibits not only excellent negative thermal expansion (NTE) property over a wide temperature range (at least from 150 to 823 K), but also very intense photoluminescence covering the entire visible region. Structure analysis shows that ZrScMo2VO12has an orthorhombic structure with the space groupPbcn(No. 60) at room temperature. A phase transition from monoclinic to orthorhombic structure between 70 and 90 K is also revealed. The intense white light emission is tentatively attributed to the n- and p-type like co-doping effect which creates not only the donor- and acceptor-like states in the band gap, but also donor-acceptor pairs and even bound exciton complexes. The excellent NTE property integrated with the intense white-light emission implies a potential application of this material in light emitting diode and other photoelectric devices.