Intense visible light emission from stress-activated ZrO2:Ti
Intense visible light emission from stress-activated ZrO2:Ti
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DOI：
10.1063/1.1494463
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发表时间：
2002-07-15
影响因子：
4
通讯作者：
Nonaka, K
中科院分区：
文献类型：
--
作者：
Akiyama, M;Xu, CN;Nonaka, K
我们研究了应力激活的ZrO2：Ti的发光现象。在大气层中，肉眼可以清楚地看到这种发光。机械发光光谱和光致发光研究表明，发光中心为Ti4+离子。机械发光强度随应激次数的增加而降低，但在紫外光照射下完全恢复。氧化锆是一种n型半导体，具有电子陷阱。结果表明，机械发光机制是由与Ti4+中心有关的电子和空穴之间的位错运动和复合引起的。(C)2002年美国物理研究所。
We have investigated the luminescence phenomena from stress-activated ZrO2:Ti. The luminescence is clearly visible to the naked eye in the atmosphere. The luminescence center has been identified as the Ti4+ ion from spectra of the mechanoluminescence and also from photoluminescence studies of ZrO2:Ti. The mechanoluminescence intensity decreases on repetitive application of stress but recovers completely on irradiation with ultraviolet light. ZrO2 is an n-type semiconductor and has electron traps. It is suggested that the mechanoluminescence mechanism arises from the movement of dislocations and recombination between electrons and holes released from these traps which are associated with the Ti4+ centers. (C) 2002 American Institute of Physics.