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Microstructure and optical absorption properties of Au-dispersed CoO thin films

机译:Au分散的CoO薄膜的微观结构和光吸收性能

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摘要

Au nanoparticles dispersed cobalt monoxide (CoO) composite films were fabricated via a chemical solution approach combined with a spin-coating processing. Au particles were spherical approximately and uniformly dispersed in the amorphous CoO matrix. The mean diameters of Au particles in the Au/CoO thin films with 40 mol% Au are about 30 nm. The optical absorption peaks due to the surface plasmon resonance (SPR) of Au particles were observed in the UV-vis absorption spectra in the wavelength range of 550-650 nm. The SPR peaks exhibit a red shift and intensify with increasing Au content from 10 to 40 mol%, but show a blue shift and weaken from 40 to 60 mol%. The band gap E_g decreases with increasing Au contents from 10 to 40 mol% but increases by further increasing Au content.
机译:通过化学溶液法与旋涂工艺相结合,制备了金纳米颗粒分散的一氧化钴(CoO)复合薄膜。 Au颗粒近似球形,均匀地分散在非晶态的CoO基体中。具有40mol%的Au的Au / CoO薄膜中的Au颗粒的平均直径为约30nm。在550-650nm波长范围内的UV-vis吸收光谱中观察到由于Au颗粒的表面等离子体激元共振(SPR)引起的光吸收峰。 SPR峰显示出红移并随着Au含量从10到40 mol%的增加而增强,但是显示出蓝移并从40 mol%到60 mol%减弱。带隙E_g随着Au含量从10摩尔%增加到40摩尔%而减小,但是通过进一步增加Au含量而增加。

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