Two-dimensional bismuth nanosheets as prospective photo-detector with tunable optoelectronic performance

被引：107

作者：

Huang, Hao ^{[1
,2
]}

Ren, Xiaohui ^{[3
,4
]}

Li, Zhongjun ^{[1
,2
,5
]}

Wang, Huide ^{[1
,2
]}

Huang, Zongyu ^{[3
,4
]}

Qiao, Hui ^{[3
,4
]}

Tang, Pinghua ^{[3
,4
]}

Zhao, Jinlai ^{[1
,2
,5
]}

Liang, Weiyuan ^{[1
,2
]}

Ge, Yanqi ^{[1
,2
]}

Liu, Jie ^{[6
]}

Li, Jianqing ^{[5
]}

Qi, Xiang ^{[3
,4
]}

Zhang, Han ^{[1
,2
]}

机构：

[1] Shenzhen Univ, Collaborat Innovat Ctr Optoelect Sci & Technol, Shenzhen Engn Lab Phosphorene & Optoelect, Shenzhen 518060, Peoples R China

[2] Shenzhen Univ, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China

[3] Xiangtan Univ, Sch Phys & Optoelect, Hunan Key Lab Micronano Energy Mat & Devices, Xiangtan 411105, Peoples R China

[4] Xiangtan Univ, Sch Phys & Optoelect, Lab Quantum Engn & Micronano Energy Technol, Xiangtan 411105, Peoples R China

[5] Macau Univ Sci & Technol, Fac Informat Technol, Macau 519020, Peoples R China

[6] Shandong Normal Univ, Sch Phys & Elect, Shandong Prov Key Lab Opt & Photon Device, Jinan 250014, Shandong, Peoples R China

来源：

NANOTECHNOLOGY | 2018年 / 29卷 / 23期

基金：

中国国家自然科学基金;

关键词：

bismuth; topological insulator; photoelectrochemical photodetector; TOPOLOGICAL INSULATOR NANOSTRUCTURES; BROAD-BAND; FORMIC-ACID; SOLAR-CELLS; GRAPHENE; PHOTOCURRENT; SPECTROSCOPY; INTENSITY; CHEMISTRY; TRANSPORT;

D O I：

10.1088/1361-6528/aab6ee

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Two dimensional Bi nanosheets have been employed to fabricate electrodes for broadband photo-detection. A series of characterization techniques including scanning electron microscopy and high-resolution transmission electron microscopy have verified that Bi nanosheets with intact lamellar structure have been obtained after facile liquid phase exfoliation. In the meanwhile, UV-vis and Raman spectra are also carried out and the inherent optical and physical properties of Bi nanosheets are confirmed. Inherited from the topological characteristics of Bi bulk counterpart, the resultant Bi nanosheet-based photo-detector exhibits preferable photo-response activity as well as environmental robustness. We then evaluate the photo-electrochemical (PEC) performance of the photodetector in 1 M NaOH and 0.5 M Na2SO4 electrolytes, and demonstrated that the as-prepared Bi nanosheets may possess a great potential as PEC-type photo-detector. Additional PEC measurements show that the current density of Bi nanosheets can reach up to 830 nA cm(-2), while an enhanced responsivity (1.8 mu A W-1) had been achieved. We anticipate that this contribution can provide feasibility towards the construction of high-performance elemental Bi nanosheets-based optoelectronic devices in the future.

引用

页数：11

共 62 条

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