Abstract
High-performance ultraviolet (UV) photodetectors have research significance owing to their importance in numerous UV light-based applications, such as those covering health care, remote sensing/imaging, astrophysical detection, and environmental monitoring. The establishment of this fast-emerging field includes schemes, development, and functioning of metal oxides (MOs) and carbon-based hybrid nanostructures in photodetection applications. MO–carbon nanotube (CNT) combinations result in novel structural, optical, and electronic functionalities; various parameters such as morphology, interaction, solution–dispersion, and configuration play important roles in nanohybrid fabrication. This chapter covers the effects of MO–CNT combinations such as TiO2/CNTs, ZnO/CNTs, and WO3/CNTs and their functionality in novel nanohybrid UV photodetector devices. The pronounced surface and dimensionality difference effects of MO–CNT nanohybrid-based photodetectors may result in a much higher photoresponse than that of their component materials, wherein heterojunction-developed Schottky barriers provide efficient charge separation and electron transfer from CNTs into highly structured MOs under UV light illumination with modulating bias voltages.
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