Solution Processed Photodetectors with PVK-WS₂ Nanotube/Nanofullerene Organic–Inorganic Hybrid Films

Abstract

Organic−inorganic hybrid photodetectors have attracted increased interest due to their exceptional properties, such as flexibility, transparency, and low cost for many promising applications. Low-dimensional tungsten disulfide (WS 2 ) nanostructures have outstanding electrical and optical properties, making them ideal candidates for ultrasensitive photodetector devices. In this paper, photodetectors were fabricated with hybrid thin films containing two different WS 2 nanomaterials, onedimensional (1D) WS 2 nanotubes (WS 2 -NTs) and a zerodimensional (0D) WS 2 nanofullerene (WS 2 -FLs) hybrid with poly(N-vinyl carbazole) (PVK). The electrical responses of the devices under visible-light illuminations were studied. The photodetector devices with 0D WS 2 -FLs/PVK hybrid thin films have relatively higher sensitivity and stable voltage responses to visible light. Besides, the hybrid film shows a strong surface-enhanced Raman effect (SERS). These materials and new strategies enable the creation of a new class of processed photodetectors for practical applications.

Ag-Nanoparticle-Coupled UV-Responsive Gelatin Nanofiber Photodetectors

“…1,2 The search for new approaches to strengthen the UV detection capability has been ongoing and has been investigated systematically for many materials. 3,4 The vast majority of sensing materials currently available for UV photodetectors are inorganic semiconductors, which are mainly based on thin-film technology. Nevertheless, the electrical characteristics of devices with thin-film structures generally exhibit higher leakage currents; therefore, the photosensitivity of photodetectors is restricted with the surface-to-volume ratio for UV exposure.…”

“…Photodetectors are photoelectric devices that convert light information into electrical signals. The ultraviolent (UV) photodetector, whose detection ranges are commonly recognized as from 100 to 400 nm, has aroused considerable interest is and has been extensively applied to the environment, healthcare, and military fields. , The search for new approaches to strengthen the UV detection capability has been ongoing and has been investigated systematically for many materials. , The vast majority of sensing materials currently available for UV photodetectors are inorganic semiconductors, which are mainly based on thin-film technology. Nevertheless, the electrical characteristics of devices with thin-film structures generally exhibit higher leakage currents; therefore, the photosensitivity of photodetectors is restricted with the surface-to-volume ratio for UV exposure.…”