Effect of photon irradiation on conductivity of nanoscale yttria-doped zirconia thin films
Effect of photon irradiation on conductivity of nanoscale yttria-doped zirconia thin films
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DOI：
10.1063/1.2709990
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发表时间：
2007-02
影响因子：
4
通讯作者：
A. Karthikeyan;S. Ramanathan
中科院分区：
文献类型：
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作者：
A. Karthikeyan;S. Ramanathan
报道了光子辐照对纳米氧化钇掺杂氧化锆薄膜高温电导率的影响。纳米尺度的薄膜在紫外线（UV）照射期间显示出总电导率的大幅下降（高达约40%），而大块单晶的电导率显示出可忽略不计的变化。UV诱导的电导率变化是快速和可逆的，离子迁移的活化能不受影响。电导率的降低可能由有效氧空位浓度的变化引起。这种受紫外线影响的电性质的改变提供了一种优雅的途径来定制用于各种固态器件的氧离子和混合导体的表面催化活性。
The effect of photon irradiation on high temperature conductivity of nanoscale yttria-doped zirconia thin films is reported. Nanoscale films show substantial decrease in total conductivity (as high as ∼40%) during ultraviolet (UV) irradiation, while the conductivity of bulk single crystals shows negligible changes. The UV induced conductivity changes are rapid and reversible and activation energies for ion migration remain unaffected. The reduction in conductivity may arise from changes in effective oxygen vacancy concentration. Such UV-influenced alteration of electrical properties offers an elegant route to tailor surface catalytic activity of oxygen ion and mixed conductors used in various solid-state devices.