NDLI: Controllable synthesis of p-type Cu$_{2}$S nanowires for self-driven NIR photodetector application

Content Provider	Springer Nature Link
Author	Wu, Chun Yan Pan, Zhi Qiang Liu, Zhu Wang, You Yi Liang, Feng Xia Yu, Yong Qiang Wang, Li Luo, Lin Bao
Copyright Year	2017
Abstract	Face-centered cubic Cu$_{2}$S nanowires with length of up to 50 μm and diameters in the range of 100–500 nm are synthesized on Si substrates through the chemical vapor deposition method using a mixed gas of Ar and H$_{2}$ as the carrier gas under a chamber pressure of about 700 Torr. It was found that the growth of quasi 1D nanostructure followed a typical vapor-liquid-solid (VLS) mechanism in which the element Cu was reduced by H$_{2}$ as the catalyst. The as-synthesized Cu$_{2}$S nanowires exhibited typical p-type semiconducting characteristics with a conductivity of about 600 S cm$^{−1}$ and a hole mobility (μ $_{h}$) of about 72 cm$^{2}$ V$^{−1}$ s$^{−1}$. Further study reveals that p-Cu$_{2}$S nanowires/n-Si heterojunction exhibits distinct rectifying characteristics with a turn-on voltage of ~0.6 V and a rectification ratio of ~300 at ±1 V in the dark and a pronounced photovoltaic behavior with an open circuit voltage (V $_{oc}$) of 0.09 V and a short circuit current (I $_{sc}$) of 65 nA when illuminated by the NIR light (790 nm, 0.35 mW cm$^{−1}$), giving rise to a responsivity (R) about 0.8 mA W$^{−1}$ and specific detectivity (D*) 6.7 × 10$^{10}$ cm Hz$^{1/2}$ W$^{−1}$ at zero bias, which suggests the potential of as-synthesized Cu$_{2}$S nanowires applied in the field of self-driven NIR photodetector.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	13880764
Journal	Journal of Nanoparticle Research
Volume Number	19
Issue Number	2
e-ISSN	1572896X
Language	English
Publisher	Springer Netherlands
Publisher Date	2017-01-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Semiconductor nanostructures Heterojunction Self-driven NIR photodetector Responsivity Specific detectivity Nanoelectronics Nanotechnology Inorganic Chemistry Characterization and Evaluation of Materials Physical Chemistry Optics, Lasers, Photonics, Optical Devices
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Atomic and Molecular Physics, and Optics Condensed Matter Physics Bioengineering Modeling and Simulation

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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