中国科学院重庆绿色智能技术研究院机构知识库

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	Anomalous temperature coefficient of resistance in graphene nanowalls/polymer films and applications in infrared photodetectors
	Zhang, Hui1,3; Zhao, Kangyi3; Cui, Songya3; Yang, Jun1,2; Zhou, Dahua1; Tang, Linlong1; Shen, Jun1; Feng, Shuanglong1; Zhang, Weiguo1; Fu, Yongqi3
	2018
摘要	Graphene nanowalls (GNWs) exhibit outstanding optoelectronic properties due to their peculiar structure, which makes them a great potential in infrared (IR) detection. Herein, a novel IR detector that is composed of polydimethylsiloxane (PDMS) and designed based on GNWs is demonstrated. Such detector possesses an anomalous temperature coefficient of resistance of 180% K-1and a relatively high change rate of current (up to 16%) under IR radiation from the human body. It primarily attributes to the ultra-high IR absorption of the GNWs and large coefficient of thermal expansion of PDMS. In addition, the GNW/PDMS device possesses excellent detection performance in the IR region with a responsivity of ∼1.15 mA W-1. The calculated detectivity can reach 1.07×108cm Hz1/2W-1, which is one or two orders of magnitude larger than that of the traditional carbon-based IR detectors. The significant performance indicates that the GNW/PDMS-based devices reveal a novel design concept and promising applications for the future new-generation IR photodetectors. © 2018 Jun Yang and Yongqi Fu et al., published by De Gruyter, Berlin/Boston.
DOI	10.1515/nanoph-2017-0135
发表期刊	Nanophotonics
ISSN	2192-8614
卷号	7期号:5页码:883-892
收录类别	SCI
语种	英语
EISSN	21928614