Facile process for the fabrication of multi-layer graphene thin film (MLGF) is reported here. Multi-layer graphene dispersion prepared by liquid-phase exfoliation of graphite was sprayed on a glass substrate by spray pyrolysis method. The structural, optical and electrical properties of the deposited MLGF are investigated. The sheets of graphene are deposited uniformly on the substrate and distribution of small graphene sheets with size of 300–500 nm can be observed in SEM image. AFM and micro-Raman results ensured that the spray-coated graphene thin film is composed of multi-layer graphene sheets. Spray coated graphene thin film showed significant optical transparency of 57% in the visible region (400–550 nm). MLGF possessed the electrical conductivity in the order of 744 S/m with surface resistivity of 3.54 k Ω/sq. The prepared liquid-phase exfoliated graphene thin film showed superior photoelectric response. The results of this study provided a framework for fabricating an optimized MLGF using a spray pyrolysis route for optoelectronics devices.

中文翻译：

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喷雾热解法制备液相剥离石墨烯薄膜的电导率和光电响应研究

这里报道了用于制造多层石墨烯薄膜（MLGF）的简便方法。通过喷雾热解法将通过石墨的液相剥离而制备的多层石墨烯分散体喷雾在玻璃基板上。研究了沉积的MLGF的结构，光学和电学性质。石墨烯片均匀地沉积在基底上，并且在SEM图像中可以观察到300-500 nm的小石墨烯片的分布。AFM和显微拉曼光谱结果确保喷涂的石墨烯薄膜由多层石墨烯片组成。喷涂石墨烯薄膜在可见光区域（400-550 nm）显示出明显的光学透明度，为57％。MLGF的电导率约为744 S / m，表面电阻率为3.54 kΩ/ sq。制备的液相剥离石墨烯薄膜表现出优异的光电响应。这项研究的结果为使用光电器件的喷雾热解路线制造优化的MLGF提供了框架。