Solution Processed Photodetectors with PVK-WS2 nanotubes/nanofullerenes Organic-inorganic Hybrid Films

Organic-inorganic hybrid photodetectors have attracted increased interest owing to their exceptional optoelectronic properties, such as flexibility, transparency, and promising applications. Low dimensional tungsten disulfide (WS2) 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 WS2 nanomaterials, one-dimensional (1D) WS2 nanotubes (WS2-NTs) and zero-dimensional (0D) WS2 nanofullerenes (WS2-FLs) hybrid with poly (n-vinyl carbazole) (PVK). The electrical responses of the devices under visible light illuminations were studied. The photodetector device with 0D WS2-FLs/PVK hybrid thin films has relatively higher sensitive 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 a new class of processed photodetectors for practical applications.