This study exhibits a solution-processed organic semiconductor humidity sensor based on vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO), tris-(8-hydroxy-quinoline)aluminum (Alq₃), and their composites.

A hybrid solar cell (HSC) based on a ZnSe and CdSe QDs-composite with improved power conversion efficiency has been demonstrated.

The current work proposed the application of methylammonium lead iodide (MAPbI₃) perovskite microrods toward photo resistor switches. A metal-semiconductor-metal (MSM) configuration with a structure of silver-MAPbI₃(rods)-silver (Ag/MAPbI₃/Ag) based photo-resistor was fabricated. The MAPbI₃ microrods were prepared by adopting a facile low-temperature solution process, and then an independent MAPbI₃ microrod was employed to the two-terminal device. The morphological and elemental compositional studies of the fabricated MAPbI₃ microrods were performed using FESEM and EDS, respectively. The voltage-dependent electrical behavior and electronic conduction mechanisms of the fabricated photo-resistors were studied using current–voltage (I–V) characteristics. Different conduction mechanisms were observed at different voltage ranges in dark and under illumination. In dark conditions, the conduction behavior was dominated by typical trap-controlled charge transport mechanisms within the investigated voltage range. However, under illumination, the carrier transport is dominated by the current photogenerated mechanism. This study could extend the promising application of perovskite microrods in photo-induced resistor switches and beyond.