溶液製程非對稱電極石墨烯光感測器

Solution-processed graphene photodetectors with asymmetric electrodes

栢贊洺(Zan-Ming Bo)

指導教授 ： 涂維珍

中原大學/電機資訊學院/電子工程研究所/碩士(2018年)

https://doi.org/10.6840/cycu201800822

摘要

近年來石墨烯獨特的光電特性以及其結構的穩定性，已經受到大量的關注，石墨烯也開始被應用在各種元件上，例如光感測器、太陽能電池、石墨烯電晶體、透明導電薄膜等等。
本論文為以旋塗還原氧化石墨烯溶液的方式於可撓之PET (Polyethylene Terephthalate)塑膠基板上製作溶液製程之石墨烯光感測器元件，透過調整旋轉塗佈機轉速來控制石墨烯薄膜品質，並在 PET上旋塗PMMA（Poly(methyl methacrylate)）提高還原氧化石墨烯於PET塑膠基板上之附著度。元件使用奈米銅線和奈米銀線作為元件之電極，奈米線可提高元件透光度，非對稱電極則提高電子與電洞之收集。
為了了解石墨烯於基板上之成膜狀況以及元件之特性，本論文使用使用SEM (Scanning Electron Microscope)和拉曼光譜儀(Raman Spectroscopy)觀察石墨烯於基板上之分布情形，並以532nm波段雷射用以量測元件之I-V特性。本論文研究成果改善大面積還原氧化石墨烯的塗佈技術，未來可應用於多種還原氧化石墨烯之可撓式元件。

關鍵字

石墨烯；光感測器

並列摘要

In recent years, the unique photoelectric properties of graphene and the stability of its structure have attracted a lot of attention. Graphene has also been applied to various devices, such as photodetectors, solar cells, graphene transistors, transparent conductive films, etc.
In our study, solution-process grapheme photodetector had been studied. The reduced grapheme oxide was attached on PET (Polyethylene Terephthalate) substrate by spin coating. In order to improve the adhesion of the reduced graphene oxide to the PET plastic substrate, a layer of PMMA (Poly(methyl methacrylate)) was spin-coated on the PET. In addition, the use of nano copper wires and nano silver wires as the electrode of the device, in addition to the use of nanowires to improve the transparency, and the use of asymmetric electrodes to improve the collection of electrons and holes. The quality of the graphene film is controlled by spin coating speed to improve the performance of the photodetector.
In order to analyze the film formation situation of the graphene on the substrate and the characteristics of the device, the distribution of graphene on the substrate was observed by SEM (Scanning Electron Microscope) and Raman spectroscopy. In addition, we use 532 nm laser to measure the I-V characteristics of the device.

並列關鍵字

graphene ； photodetectors

參考文獻

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