Enhancement of the Photoresponse of Monolayer MoS2 Photodetectors Induced by a Nanoparticle Grating

doi:10.1021/acsami.9b20506

	Enhancement of the Photoresponse of Monolayer MoS2 Photodetectors Induced by a Nanoparticle Grating
	Li, Jialu 1,2; Nie, Changbin 2; Sun, Feiying 2; Tang, Linlong 2; Zhang, Zijing 1; Zhang, Jiandong 1; Zhao, Yuan 1; Shen, Jun 2; Feng, Shuanglong 2; Shi, Haofei 2
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020-02-19
卷号	12 期号:7 页码:8429-8436
关键词	MoS2 photodetector plasmonics photoresponsivity enhancement
ISSN号	1944-8244
DOI	10.1021/acsami.9b20506
通讯作者	Zhao, Yuan(zhaoyuan@hit.edu.cn) ; Shi, Haofei(shi@cigit.ac.cn) ; Wei, Xingzhan(weixingzhan@cigit.ac.cn)
英文摘要	Photodetectors based on two-dimensional (2D) materials such as monolayer MoS2 are attractive because they can be directly integrated into the current metal-oxide semiconductor (CMOS) structures. Unfortunately, such devices suffer from low responsivity due to low absorption by the monolayer MoS2. Combining MoS2 with plasmonic nanostructures is an alternative solution for enhancing the absorption of the 2D semiconductor, and this can drastically increase the photoresponsivity of the corresponding photodetector. Herein, a device incorporating a grating-patterned nanoparticle structure is fabricated using traditional photolithography together with an annealing step. We demonstrate that this new structure leads to a strong enhancement in the photocurrent due to the coupling of the MoS2 to localized surface plasmons in the nanoparticle grating. Compared to a simple Au nanoparticle array, the nanoparticle grating structure generates a 100% increase in optical absorption. Thus, under 532 nm illumination, the composite nanoparticle grating/monolayer MoS2 integrated photodetector shows a 111-fold increase in the photocurrent compared to the same device in the absence of nanoparticles. The gateless responsivity can be up to 38.57 A/W and a specific detectivity of 9.89 x 10(9) Jones is realized. Moreover, photothermal flux derivations indicate that, in addition to the expected increase due to light-generated carrier multiplication, the thermal effects of plasmons provide a significant contribution to the photocurrent enhancement.
资助项目	National Natural Science Foundation of China[11574308] ; National Key R&D Program of China[2017YFE0131900] ; Natural Science Foundation of Chongqing, China[cstc2019jcyjjqX0017]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000515214300062
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10544]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Zhao, Yuan; Shi, Haofei; Wei, Xingzhan
作者单位	1.Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Li, Jialu,Nie, Changbin,Sun, Feiying,et al. Enhancement of the Photoresponse of Monolayer MoS2 Photodetectors Induced by a Nanoparticle Grating[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(7):8429-8436.
APA	Li, Jialu.,Nie, Changbin.,Sun, Feiying.,Tang, Linlong.,Zhang, Zijing.,...&Wei, Xingzhan.(2020).Enhancement of the Photoresponse of Monolayer MoS2 Photodetectors Induced by a Nanoparticle Grating.ACS APPLIED MATERIALS & INTERFACES,12(7),8429-8436.
MLA	Li, Jialu,et al."Enhancement of the Photoresponse of Monolayer MoS2 Photodetectors Induced by a Nanoparticle Grating".ACS APPLIED MATERIALS & INTERFACES 12.7(2020):8429-8436.