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High performance graphene-like thinly layered graphite based visible light photodetector

机译：高性能石墨烯状薄层石墨基可见光光电探测器

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In this work, the drop casting method is utilized to obtain a thin graphene-like graphite layer as a photodetection layer on a SiO2/Si substrate, and its performance is characterized to determine its potential use in commercial applications. The thin layer is formed by first synthesizing graphite soot from a butane flame before being turned into a liquid solution and drop-casted onto the substrate to form a thin graphene-like graphite film. Field emission scanning electron microscope and Raman vibrational mode analyses indicate that the fabricated graphene-like graphite layer has characteristics similar to the graphene. The graphene-like graphite photodetector demonstrates a narrow photoresponse from 530 to 680 nm, covering visible sources from green to red. The responsivity and external quantum efficiency of the device under the illumination of red laser 660 nm is found to be around 148 mA W-1 and 27.8% respectively and is faster than that reported for similar systems using graphene and reduced graphene oxide previously. A fast response time of 83.7 and 28 mu s at a modulation frequency of 1.0 and 10000 Hz respectively from the graphene-like thinly layered graphite photodetector shows potential application for the development of low-cost carbon-based photodetectors in near future.
机译：在这项工作中，采用滴铸法在SiO2 / Si衬底上获得了一层薄的石墨烯状石墨层作为光检测层，其性能被确定为在商业应用中具有潜在的用途。薄层是通过首先由丁烷火焰合成石墨烟灰，然后转化为液体溶液并滴铸到基板上而形成的薄石墨烯状石墨膜而形成的。场发射扫描电子显微镜和拉曼振动模式分析表明，所制备的石墨烯状石墨层具有与石墨烯相似的特性。类似于石墨烯的石墨光电探测器显示出从530到680 nm的窄光响应，覆盖了从绿色到红色的可见光源。发现该器件在660 nm红色激光照射下的响应度和外部量子效率分别约为148 mA W-1和27.8％，比先前报道的使用石墨烯和氧化石墨烯的类似系统要快。石墨烯状薄层石墨光电探测器分别在1.0和10000 Hz的调制频率下的83.7和28μs的快速响应时间显示了在不久的将来开发低成本碳基光电探测器的潜在应用。

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