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首页> 外文期刊>Crystal Research and Technology: Journal of Experimental and Industrial Crystallography >Photochromic Response and Steady-State Photoconductivity of Fibrous-Reticulated alpha-MoO3 Thin Films Prepared by Modified Spray Pyrolysis Technique
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Photochromic Response and Steady-State Photoconductivity of Fibrous-Reticulated alpha-MoO3 Thin Films Prepared by Modified Spray Pyrolysis Technique

机译：通过改性喷雾热解技术制备的纤维网状α-MOO3薄膜的光致变色响应和稳态光电导

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摘要

A modified spray pyrolysis technique is used for preparing alpha-MoO3 thin films after subsequent heat treatment at a relatively low temperature. The spray parameters are selected through a wide variety of elaboration conditions for best photochromic features. Different numbers of spraying and drying cycles are performed to investigate the thickness effect on the structural, morphological, optical, electrical, and photo-electrical properties of the nanostructured alpha-MoO3 films. These film samples are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and thus the film thickness effect is elucidated and correlated to the crystallite shape and size. The SEM micrographs show fibrous-reticulated morphology for all the film samples investigated here. The photochromic properties of alpha-MoO3 sprayed thin films are investigated by measuring the transmission spectra before and after UV-light exposure. The changes in the optical transmission of these film samples are monitored for different exposure times. The UV exposure time effect as well as the thickness effect on the photochromic response of the film samples is investigated and discussed based on the particle size analysis. The photosensitivity is evaluated in various illumination levels to elucidate the carrier transport in the alpha-MoO3 films and to determine the type of the recombination processes in these films.
机译：改性的喷雾热解技术用于在随后在相对低的温度下进行热处理后制备α-Moo3薄膜。通过各种阐述条件选择喷雾参数以获得最佳光致变色特征。进行不同数量的喷涂和干燥循环，以研究纳米结构α-MOO3薄膜的结构，形态，光学，电气和光电性质的厚度效应。这些薄膜样品的特征在于X射线衍射（XRD）和扫描电子显微镜（SEM），因此阐明膜厚度效果并与微晶形状和尺寸相关。 SEM显微照片显示出此处研究的所有薄膜样本的纤维网状形态。通过测量UV光曝光前后的透射光谱来研究α-MOO3喷雾薄膜的光致变色性质。监测这些薄膜样品的光学传输的变化，用于不同的曝光时间。研究紫外线暴露时间效应以及对薄膜样品光致变色响应的厚度效应基于粒度分析讨论。在各种照射水平中评估光敏性，以阐明α-Moo3膜中的载流子输送，并确定这些薄膜中的重组过程的类型。

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