Novel visible-light-driven photoconductive properties of LaCoO3 epitaxial nano-thin films
Novel visible-light-driven photoconductive properties of LaCoO3 epitaxial nano-thin films
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LaCoO3 外延纳米薄膜的新型可见光驱动光电导特性
DOI:
10.1016/j.matlet.2017.08.070
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发表时间:
2017-12
影响因子:
3
通讯作者:
Li Chengbo
中科院分区:
文献类型:
--
作者:
Liu Haifeng;Guo Baogang;Zheng Kui;Xie Ruishi;Zhang Xingquan;Wu Xiaoyu;Zhang Yanping;Li Chengbo
LaCoO3nano-thin films were grown on (0 0 1), (1 1 0) and (1 1 1) oriented SrTiO3substrates by the polymer assisted deposition method, respectively. All the LaCoO3films are in epitaxial growth in accordance with the orientation of STO, with biaxial tensile strain. The films, especially for (1 1 1) oriented film, exhibit excellent visible-light photoconductive properties. The strain-induced increase of Co-O bond length may contribute to reduce thet2g-eggap of Co3+and further increase the number of photoexcitedegitinerant electrons. The different photoconductive activity of LaCoO3epitaxial films may be attributed to the different surface energies of crystal planes. It suggests that the LaCoO3epitaxial film can be considered as a potential candidate for visible-light photodetector.
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