ICCAS OpenIR
Highly anisotropic solar-blind UV photodetector based on large-size two-dimensional alpha-MoO3 atomic crystals
Zhong, Mianzeng1,2; Zhou, Ke5; Wei, Zhongming1,2; Li, Yan1,2; Li, Tao6; Dong, Huanli5; Jiang, Lang5; Li, Jingbo1,2; Hu, Wenping3,4,5
2018-07-01
Source Publication2D MATERIALS
ISSN2053-1583
Volume5Issue:3
AbstractOrthorhombic MoO3 (alpha-MoO3) is a typical layered n-type semiconductor with optical band gap over 2.7 eV, which have been widely studied in catalysis, gas sensing, lithium-ion batteries, field-emission, photoelectrical, photochromic and electrochromic devices, supercapacitors and organic solar cells. However, the bottleneck of generation large size atomic thin two-dimensional (2D) alpha-MoO3 crystals remain challenging this field (normally several micrometers size). Herein, we developed a facile vapor-solid (VS) process for controllable growth of large-size 2D alpha-MoO3 single crystals with a few nanometers thick and over 300 mu m in lateral size. High-performance solar-blind photodetectors were fabricated based on individual 2D alpha-MoO3 single crystal. The detectors demonstrate outstanding optoelectronic properties under solar-blind UV light (254 nm), with a photoresponsivity of 67.9 A W-1, external quantum efficiency of 3.3 x 10(4)%. More important, the devices showed strong in-plane anisotropy in optoelectronic response and transport properties, e.g. the photocurrent along b-axis was found to be 5 times higher than the values along c-axis under 254 nm UV light, and current ON/OFF ratio and mobility anisotropy is about 2 times high. Our work suggests an optimized synthesis routine for 2D crystals, and the great potential of 2D oxides in functional optoelectronics.
KeywordAlpha-moo3 Controllable Growth Large-area Atomic Crystal Anisotropy Optoelectronic
DOI10.1088/2053-1583/aac65e
Indexed BySCI
Language英语
WOS IDWOS:000435145100001
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/42580
Collection中国科学院化学研究所
Corresponding AuthorWei, Zhongming
Affiliation1.Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
2.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 100083, Peoples R China
3.Tianjin Univ, Sch Sci, Tianjin Key Lab Mol Optoelect Sci, Dept Chem, Tianjin 300072, Peoples R China
4.Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 300072, Peoples R China
5.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing 100190, Peoples R China
6.Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China
Recommended Citation
GB/T 7714
Zhong, Mianzeng,Zhou, Ke,Wei, Zhongming,et al. Highly anisotropic solar-blind UV photodetector based on large-size two-dimensional alpha-MoO3 atomic crystals[J]. 2D MATERIALS,2018,5(3).
APA Zhong, Mianzeng.,Zhou, Ke.,Wei, Zhongming.,Li, Yan.,Li, Tao.,...&Hu, Wenping.(2018).Highly anisotropic solar-blind UV photodetector based on large-size two-dimensional alpha-MoO3 atomic crystals.2D MATERIALS,5(3).
MLA Zhong, Mianzeng,et al."Highly anisotropic solar-blind UV photodetector based on large-size two-dimensional alpha-MoO3 atomic crystals".2D MATERIALS 5.3(2018).
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