Effects of precursor composition used in solution precursor plasma spray on the properties of ZnO coatings for CO2 and UV light sensing. Surface and Coatings Technology. 371:395-400.

In this study, the characteristic physicochemical and electrical properties of HCl‐doped polyaniline (PAni) films grown via oxidative chemical polymerization of aniline on n ‐Si(100) are presented. Two exothermic processes were found for 0.2 M HCl solution during aniline polymerization while all others underwent one exothermic process only. All polyaniline films were of emeraldine salt form that exhibited connected rod‐like to agglomerated grains and dendritic surface morphologies on top of wetting layer with increasing hydrochloric acid concentration. Rectifying behaviour of p‐ PAni/n ‐Si(100) heterojunctions were also found indicating the formation of p‐n junction between p ‐PAni and n ‐Si(100). (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Herein, the growth of pristine ZnO nanostructures thin film on p‐Si(100) by modified successive ionic layer adsorption‐reduction method, revealing significant improvement in the charge collection for ultraviolet light detection, is reported. The deposited ZnO exhibits spindle‐like and hexagonal structure that grows preferentially along the c‐axis. Two‐probe electrical measurements validate the rectifying nature of the constructed n‐ZnO/p‐Si(100), revealing a substantial 11.3‐fold increase in photocurrent at room temperature under 375 nm irradiation at +3 V working voltage. The drastic increase in photocurrent is linked to efficient charge separation caused by charge transfer and band bending effects, as indicated by microsecond time‐resolved absorption measurements, providing useful information for device development.