Fully Suspended and Broad Spectral Photodetectors Based on Self-supported MoS2-RGO-MoS2 Composite Film

doi:10.7517/issn.1674-0475.210106

Abstract

Abstract: The broad spectral photodetector is designed to obtain the electromagnetic wave information of ultraviolet, visible and infrared bands, which are emitted or reflected by the target to accurately identify and analyze the target in various environments. The broad spectral photodetectors are widely used in imaging, medical diagnosis, remote sensing, night vision, environmental monitoring, and artificial intelligence fields. In this paper, a suspended MoS₂-RGO-MoS₂ photodetector is designed and fabricated by combining the high-efficiency and broad-spectrum optical absorption characteristics of MoS₂ with the high-efficiency transport characteristics of RGO. In the unique structure of MoS₂-RGO-MoS₂, the MoS₂ on the upper surface plays a role to absorb incident light, and the MoS₂ on the lower surface is able to absorb the transmitted light. This elegant design endows the detector with high-efficiency light capture and improved responsivity. The comparative study of MoS₂-RGO-MoS₂ photodetector and RGO photodetector shows that the responsivity of MoS₂-RGO-MoS₂ photodetector is significantly higher than that of RGO photodetector in a wide spectral range from UV (375 nm) to NIR (1550 nm). The highest responsivity of MoS₂-RGO-MoS₂ photodetector can reach 1006 mA/W and this is of great significance to the practical application of the detector.

Key words: broad-spectrum, photodetector, RGO, MoS₂

WANG Chenfeng, CAO Yang. Fully Suspended and Broad Spectral Photodetectors Based on Self-supported MoS₂-RGO-MoS₂ Composite Film[J]. IMAGING SCIENCE AND PHOTOCHEMISTRY, 2021, 39(4): 497-503.

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Fully Suspended and Broad Spectral Photodetectors Based on Self-supported MoS₂-RGO-MoS₂ Composite Film

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