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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	Light Trapping in Conformal Graphene/Silicon Nanoholes for High-Performance Photodetectors
	Yang, Jun1,2; Tang, Linlong1; Luo, Wei1; Shen, Jun1; Zhou, Dahua1; Feng, Shuanglong1; Wei, Xingzhan1; Shi, Haofei1
	2019-08-21
摘要	Hybrid graphene/silicon heterojunctions have been widely utilized in photodetectors because of their unique characteristics of high sensitivity, fast response, and CMOS compatibility. However, the photoresponse is restricted by the high reflectance of planar silicon (up to 50%). Herein, an improved graphene/Si detector with excellent light absorption performance is proposed and demonstrated by directly growing graphene on the surface of silicon nanoholes (SiNHs). It is shown that the combination of SiNHs with conformal graphene provides superior interfaces for efficient light trapping and transport of the photoexcited carriers. A high absorption of up to 90% was achieved, and the conformal graphene/SiNH-based photodetectors exhibited a higher photoresponsivity (2720 A/W) and faster response (similar to 6.2 mu s), compared with the counterpart of the planar graphene/Si, for which the corresponding values are 850 A/W and 51.3 mu s. These results showcase the vital role of the material morphology in optoelectronic conversion and pave the way to explore novel high-performance heterojunction photodetectors.
关键词	graphene photodetector light trapping silicon nanostructures conformal
DOI	10.1021/acsami.9b08268
发表期刊	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
卷号	11期号:33页码:30421-30429
收录类别	SCI
WOS记录号	WOS:000482546000099
语种	英语