| Two-dimensional materials have attracted great attention because of their excellent optical,electrical and thermal properties.They are widely distributed in the fields of optoelectronic devices,thermal devices,energy conversion and storage.In particular,the transition metal chalcogenide Mo S2 is a two-dimensional direct band gap semiconductor material with a forbidden band width of 1.8 e V.It is one of the most excellent two-dimensional semiconductor materials with excellent photoelectric performance.There are huge potential application prospects.However,the photodetector based on the two-dimensional material can exceed the further improvement of light detection performance in ultra-thin characteristics and low light absorption rate,and the current research on low-angle substitution and heat-assisted enhancement rarely involves broad Photoelectric detection.Therefore,in this paper,a new wide-band room temperature photodetector with better performance than traditional photodetectors is designed in combination with the idea of bio-bionics,which creatively implements layered molybdenum disulfide/non-layered cadmium sulfide/gold composite materials and bionic quasi.The photonic micro-nano structure is integrated,and a heat-assisted low-angle-dependent broad-band?visible-near infrared?light detector is prepared.The photodetector prepared in this paper?effective area:square millimeter level?has continuously reported high-level disulfide micro-heterostructure photodetectors.At low voltage?0.5 V?,the wavelengths are 660,808,and 980 nm,respectively.The light responsivity is up to 132.06,122.46 and 74.44 m A/W.Which is quite competitive with the current high-performance photodetectors with small photosensitive effective area?effective area:square micrometer level?.The design and preparation of the detector provide effective theoretical guidance.The main work contents of this article are summarized as follows:1.Proposed the idea of constructing a high-performance photodetector.We using a simple wet chemistry method combined with bionic technology to prepare a new photodetector,which is a combination of two-dimensional material,semiconductor and metal composite material and a quasi-photon micro-nano structure of Paris green butterfly butterfly fore wings?PW?Mo S2/Cd S/Au?C?PW.In terms of calculation,the time-domain finite difference method?FDTD?,Joule's law,heat radiation law and first-principles calculation methods are introduced to facilitate the in-depth study of the photoelectric performance of Mo S2/Cd S/Au?C?PW devices.2.The Mo S2/Cd S/Au?C?PW device was successfully prepared,and the composition was characterized by scanning electron microscopy,high-resolution transmission electron microscopy,energy dispersive X-ray spectroscopy,X-ray diffractometer,Raman test,X-ray photoelectron spectroscopy and photoluminescence Spectral testing.The Mo S2/Cd S/Au?C?PW optical model was established,and its photoelectric detection performance was deeply explored,which showed that the device has the characteristics of high light absorption,low angle dependence,thermal radiation balance,low power consumption and wide band response. |
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