具有自供電功能之大面積可撓式還原氧化石墨烯光感測器

Self-powered, large-area, and flexible photodetectors based on reduced graphene oxide

黃敬閎(Jing-Hong Huang)

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(2019年)

https://doi.org/10.6840/cycu201900079

摘要

二維材料石墨烯具有許多優異的性能，包括可撓性、高導電率、高透明度、較寬的吸收頻譜，已廣泛應用於光電材料或是光感測器元件，但是因為較低的吸收率和較小的檢測面積，因此單層石墨烯光感測器具有較低的響應性，此外在轉移單層石墨烯的過程也面臨著產生皺摺與堆積的問題。製作出具有自供電功能的光感測器，這個方法可以降低製造成本，並應用於各式還原氧化石墨烯的可撓性元件上。
在這篇論文中，我們透過溶液製程將還原氧化石墨烯置於ITO/PET基板之上，以Ag作為頂部電極，由於ITO與Ag功函數的差異，此元件可以在沒有電源的情況下作業，做出經濟實惠的光感測器，這些元件具有可撓和自供電的特性，對於未來低功耗和可穿戴式元件具有巨大的潛力。

關鍵字

還原氧化石墨烯 ； 自供電 ； 可撓性 ； 光感測器 ； 旋塗

並列摘要

Two-dimensional graphene with outstanding properties including flexible, high conductivity, high transparency, and wide-band absorption has been applied for optoelectronic materials and devices such as photodetectors. However, single layer graphene photodetectors suffer from low responsivities mainly due to low absorption and small detection area. Moreover, transferred process of single layer graphene on substrate faces the issue of corrugation and aggregation. Self-powered photodetectors was realized by spin-coating reduced graphene oxide (rGO) onto an ITO coated flexible PET substrate. The device could work without power because of the work function difference between ITO and Ag. The proposed method reduces the fabrication cost and can be applied to various flexible rGO based devices.
In this study, solution-processed rGO on ITO/PET substrate with Ag top contact to construct cost-effective photodetectors were proposed. These devices show flexible and self-powered characteristics which have great potential for future low-power and wearable devices.

並列關鍵字

Reduced graphene oxide ； Self-powered ； Flexible ； Photodetector ； Spin-coating

參考文獻

[1]Geim, A. K., & Novoselov, K. S. (2007). The rise of graphene. Nature materials, 6(3), 183

[2]Suk, J. W., Kitt, A., Magnuson, C. W., Hao, Y., Ahmed, S., An, J., ... & Ruoff, R. S. (2011). Transfer of CVD-grown monolayer graphene onto arbitrary substrates. ACS nano, 5(9), 6916-6924.

[3]Gomez De Arco, L., Zhang, Y., Schlenker, C. W., Ryu, K., Thompson, M. E., & Zhou, C. (2010). Continuous, highly flexible, and transparent graphene films by chemical vapor deposition for organic photovoltaics. ACS nano, 4(5), 2865-2873.

[4]Lee, Changgu, et al. "Measurement of the elastic properties and intrinsic strength of monolayer graphene." science 321.5887 (2008): 385-388.

[5]Nair, Rahul Raveendran, et al. "Fine structure constant defines visual transparency of graphene." Science 320.5881 (2008): 1308-1308