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Fabrication of [email protected]2 Nanocomposite Heterojunction Arrays and Their Photoelectric Properties

1
.Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
2
School of Science, Huzhou University, Huzhou 313000, China
3
Research Center for Photonic Technology, Fujian Key Laboratory for Advanced Micro-nano Photonics Technology and Devices & Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China
4
College of Science, Zhejiang University of Technology, Hangzhou 310023, China
5
College of Physics and Electronics, Central South University, Changsha 410083, China
*
Authors to whom correspondence should be addressed.
These authors contribute equally to this article.
Micromachines 2020, 11(2), 189; https://doi.org/10.3390/mi11020189
Received: 11 January 2020 / Revised: 7 February 2020 / Accepted: 9 February 2020 / Published: 12 February 2020
In this paper, [email protected]2 core-shell heterojunction arrays were successfully prepared by the two-step hydrothermal method, and the growth mechanism was systematically studied. We found that the growth process of molybdenum disulfide (MoS2) was sensitively dependent on the reaction temperature and time. Through an X-ray diffractometry (XRD) component test, we determined that we prepared a 2H phase MoS2 with a direct bandgap semiconductor of 1.2 eV. Then, the photoelectric properties of the samples were studied on the electrochemical workstation. The results show that the [email protected]2 heterojunction acts as a photoanode, and the photocurrent reaches 2.566 mA under the conditions of 1000 W/m2 sunshine and 0.6 V bias. The i-t curve also illustrates the perfect cycle stability. Under the condition of illumination and external bias, the electrons flow to the conduction band of MoS2 and flow out through the external electrode of MoS2. The holes migrate from the MoS2 to the zinc oxide (ZnO) valence band. It is transferred to the external circuit through the glass with fluorine-doped tin oxide (FTO) together with the holes on the ZnO valence band. The [email protected]2 nanocomposite heterostructure provides a reference for the development of ultra-high-speed photoelectric switching devices, photodetector(PD) devices, and photoelectrocatalytic technologies.
Keywords: [email protected] heterojunction; hydrothermal; photoanode; photoelectric properties [email protected] heterojunction; hydrothermal; photoanode; photoelectric properties
MDPI and ACS Style

Wu, H.; Jile, H.; Chen, Z.; Xu, D.; Yi, Z.; Chen, X.; Chen, J.; Yao, W.; Wu, P.; Yi, Y. Fabrication of [email protected]2 Nanocomposite Heterojunction Arrays and Their Photoelectric Properties. Micromachines 2020, 11, 189.

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