Dynamic Control of High-Range Photoresponsivity in a Graphene Nanoribbon Photodetector
发布时间：2020-06-06
点击次数：
DOI码：10.1186/s11671-020-03352-7
发表刊物：Nanoscale Res Lett
摘要：Graphene has been demonstrated to be a promising material for optoelectronics and photodetection devices because of its ultra-broadband optical absorption and high carrier mobility. However, its integration with optoelectronic systems has been limited by the zero-bandgap and the lack of a gain mechanism. Herein, we demonstrate a novel photodetector based on the graphene nanoribbons (GRNs) with a sizable bandgap. Utilizing trapping charge at the interface between SiO2 and light-doped silicon, an ultrahigh gain of 22,400 has been obtained. Our devices show an enhanced photoresponsivity (~ 800 AW−1) while the response speed is still fast (up to 10 μs). This photoresponsivity is about two orders of magnitude higher compared to that of a previous graphene-based photodetector. The photodetector exhibits a wide-range tunability via source-drain bias and back gate voltage. Our work addresses key challenges for the photodetectors and potentially provides the desired pathway toward practical application of graphene photodetectors that can be externally manipulated by an electric field with fast response speed and high sensitivity.
论文类型：期刊论文
通讯作者：Juan Yu , Jiahong Zhong , Xiaofei Kuang, Cheng Zeng , Lingkai Cao , YP. Liu(刘艳平) * , Zongwen Liu
文献类型：J
卷号：15
期号：124
是否译文：否
发表时间：2020-06-05
收录刊物：SCI、SSCI
发布期刊链接：https://nanoscalereslett.springeropen.com/articles/10.1186/s11671-020-03352-7
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