High-performance, self-powered flexible MoS₂ photodetectors with asymmetric van der Waals gaps

Abstract

With the urgent demand for low-energy-consumed and wearable devices, it is desirable to find an easy, effective, and low-cost method to fabricate self-powered flexible photodetectors with simple configuration and high...

A broadband self-powered photodetector based on NiPS3

“…The results show that the photocurrent rose with the increase of the incident optical power density (2.7-9.3 mW cm À2 ) without any saturation, which could be because more electron-hole pairs were generated after more excitation of valence band electrons. 51 Besides, in Fig. 4f we fit data points for power density dependent I ph under 515 nm irradiation by the equation I ph = P a , where a is the index of the power law.…”

High-performance broadband flexible photodetector based on Gd3Fe5O12-assisted double van der Waals heterojunctions

“…Figure 1a shows a schematic illustration of exible photodetector with SWCNT/Gr/MoS 2 double heterostructures. On the exible polyethylene terephthalate (PET) substrate, the MoS 2 lm is rst used as a visible-wavelength absorption layer 13 , above it is a graphene layer. Gr not only forms van der Waals heterojunction with MoS 2 and SWCNT lm, but also transports carriers as a transparent electrode.…”

“…They are widely used in various elds such as medical detection [3][4] , environmental monitoring [5][6] , and imaging [7][8] . Recently, the promotion of exible photodetectors has been accelerated by the emergence of low-dimensional materials 9 , such as carbon family 0D material C 60 10 , 1D material carbon nanotube 11 , 2D material graphene 12 ; transition metal sul de family [13][14][15] ; and black phosphorus 16 , hexagonal boron nitride and other graphene-like materials 2D materials [17][18][19] . The unique optical, electrical and mechanical properties of low-dimensional materials make them of great importance for the fabrication of high-performance exible photodetectors.…”

Highly Sensitive Photoelectric Detection and Imaging Enhanced by the Pyro‐Phototronic Effect Based on a Photoinduced Dynamic Schottky Effect in 4H‐SiC

“…In general, Schottky contact tends to create a built‐in electric field between materials, which provides a driving force for the external electrons transportation to ensure the smooth current flow in circuits. [ 20 ] While the relatively simple “Ohmic contact” will lack the driving force as aforesaid due to less built‐in electric field, making the carriers difficult to be transported and collected, so that a high responsivity photodetection will be hardly obtained. To solve this problem, combining the two connection modes (“Schottky + Ohmic contact” as shown in Figure 2e) is a good way to support both the strong driving force and the smooth current transport in the circuit, whose trend of the curve is in the middle state of the two connection modes mentioned above.…”