This paper presents a comprehensive overview of the current landscape of self-powered photodetectors, emphasizing the emerging role of transition metal dichalcogenides (TMDCs) as promising materials for addressing their growing need in this field.

In the present work, comparative investigations on NO₂ gas sensing properties of the hybrid nanocomposite thin films of polyaniline (PANI), ZnO and PANI–ZnO towards NO₂ gas at room temperature have been reported.

A potential method for using the triboelectric effect to convert mechanical energy into electrical energy is the triboelectric nanogenerator (TENG). This review highlights the key ideas discussed in the prior parts, including the mechanism and design principles of TENG devices, materials used to construct them, methods for boosting triboelectric charge densities, and applications. This study investigates TENGs as self-powered sensors for photodetection, chemical detection, and humidity control. It also emphasizes their capacity to store energy using batteries and supercapacitors as well as their ability to capture energy from wind, rain, ocean waves, acoustic vibrations, and other sources. This review also discusses the use of TENGs in the biomedical field as biosensors, electrical stimulation, and in vivo applications. It highlights how TENG technology may play a crucial part in delivering self-sufficient and long-lasting solutions for a variety of problems, thus promoting advancements in energy harvesting, environmental monitoring, and healthcare.