Enhanced light absorption and charge separation of In‐doped ZnO nanorod arrays for photoelectrochemical water‐splitting application

Abstract

Elemental doping promises an efficient strategy to modify and optimize the performance of metal oxide photoanodes. Herein, we introduce a simple hydrothermal method to fabricate In-doped ZnO thin films on the fluorinedoped tin oxide (FTO) to use as a photoanode for water splitting application.The effects of In-doping on the structural, optical, morphological, and electrical properties of ZnO nanorods were studied. PEC results indicate that the 5%In doped ZnO photoanode determined an outstanding photocurrent density reached 0.42 mA/cm 2 at 0.64 V Ag/AgCl , which is four times higher than the undoped ZnO sample (0.1 mA/cm 2 ). Furthermore, Ultraviolet-visible spectroscopy (UV-Vis) and photoluminescence spectroscopy (PL) studies showed a red-shift in the band edge of doped samples compared to the pure samples, which indicate that the light absorption is enhanced. We find that the optimal doping of In (5%) leads to smaller charge transfer resistance and higher electron transfer rate as confirmed from EIS analysis. Therefore, fabricated Indoped ZnO could be a favorable and potential photoelectrode for lightharvesting and water splitting application.

Fabrication and Characterization of the Broccoli-like Structured CuO Thin Films Synthesized by a Facile Hydrothermal Method and Its Photoelectrochemical Water Splitting Application

“…Linear scanning voltammograms were obtained at 10 mV/s over a potential range of −0.6 to 0.0 V vs. Ag/AgCl in the light and dark/light conditions. Equation ( 5) was used to calculate the applied bias photo-to-current efficiency (ABPE), which is used as a diagnostic method in the development of materials [23]. The IPCE G1218a (PV Measurement) measuring system was used to measure the photon-to-current conversion efficiency (IPCE).…”

Rational design of hierarchical MOF ‐derived CoP @ Co‐Fe LDH bifunctional electrocatalyst: An approach toward efficient overall water splitting in alkaline media

“…In line with this, hydrogen energy, a type of energy that does not produce harmful by‐products such as greenhouse gases, is attracting research attention 1‐3 . Among the various methods for producing hydrogen, water electrolysis techniques of water to obtain H 2 and O 2 have been widely studied 4‐7 . This process consists of two half‐reactions: the hydrogen evolution reaction (HER) on one side and the oxygen evolution reaction (OER) on the other 8 .…”

Highly efficient photocatalytic H 2 evolution over Ni‐doped Mn 0. 5 Cd 0 . 5 S nanorods under visible light

“…Energy crisis has been a serious issue facing mankind at present. 1,2 Hydrogen (H 2 ) is regarded as an ideal clean energy in the future due to its concentrated energy density and environment friendliness. Photocatalytic H 2 generation strategy is a promising method because of its sustainable, and low-cost features.…”

“…Energy crisis has been a serious issue facing mankind at present 1,2 . Hydrogen (H 2 ) is regarded as an ideal clean energy in the future due to its concentrated energy density and environment friendliness.…”