Direct WS2 photodetector fabrication on a flexible substrate

Reducing noise current in exfoliated WS2 nanosheets using an ultra-nanocrystalline diamond substrate and their enhanced NIR photodetection properties

“…These results suggest that the synergistic effect between MD–WS 2 and the NUNCD substrate improves the stability of the as-fabricated MD–WS 2 /NUNCD samples. Table 1 compares similar photodetection studies of WS 2 and nanodiamond reported elsewhere 14,17–20,28,29 with the present MD–WS 2 /NUNCD photodetector.…”

“…10,11 Although a monolayer or multilayer WS 2 -based photodetector shows good detectivity, and a broad spectral response, most of the studies have reported a low responsivity of B0.51 mA W À1 for WS 2 alone. [12][13][14] It is thus hard to balance fast response speed, high current on/off ratio and responsivity simultaneously in a pure WS 2 layer. Heterojunction devices were further explored to enhance its performance.…”

Fabrication, material regulation, and healthcare applications of flexible photodetectors

“…RF magnetron sputtering has been widely used to fabricate flexible PDs. [23][24][25] For instance, Li et al sputtered ZnO thin films and Ag electrodes on a paper substrate by RF magnetron sputtering (Fig. 1a).…”

“…Another solution for adjusting the bandgap of graphene is to replace or combine graphene with TMDs. 20,23,63,77 Kim et al directly deposited MoS 2 on a polydimethylsiloxane (PDMS) substrate by low-temperature sputtering and large-area photonic crystallization technology, and prepared an ultra-thin flexible PD, as shown in Fig. 4c.…”

Monolayer WS2 Nanosheets Passivated with HfO2 for Enhanced Photodetectors

“…Specifically, the bulk WS 2 is an indirect band gap semiconductor with a band gap of 1.3 eV, while the monolayer WS 2 is a direct band gap semiconductor with a band gap of 1.98 eV . Thus, WS 2 has emerged as a promising candidate for a wide range of applications including, but not limited to, high-sensitivity photodetectors, , photonics, biology, nanomedicine, nanopatterning and nanotechnology …”