Highly efficient photoelectrochemical response by sea-urchin shaped ZnO/TiO₂ nano/micro hybrid heterostructures co-sensitized with CdS/CdSe

Abstract

ZnO/TiO2-based hybrid heterostructures co-sensitized with CdS and CdSe showed remarkable PEC response while offering efficient scattering of sunlight in the visible frequency domain, and efficient electron–hole separation and transport.

Visible‐Light Sensitization and Photoenergy Storage in Quantum Dot/Polyoxometalate Systems

“…Thus, tuning and matching the band energetics of the two NCs are critical to achieve efficient charge transfer and transport. Charge separation between the different semiconductor NCs has been intensively studied in CdSeTiO 2 and CdSZnO systems 12–16. These studies revealed that photoexcited charge injection from CdSe (or CdS) to TiO 2 (ZnO) was possible by using visible‐light irradiation because of the narrow band gap of CdSe (or CdS).…”

Zinc Oxide Nanorods Shielded with an Ultrathin Nickel Layer: Tailoring of Physical Properties

“…In particular, ZnO nanostructures with metallic shell-layers (Ag, Au, Ni, Co) have exhibited interesting device properties as: photocatalysts202122, photoelectrochemical anodes2324, sensors25, DNA detectors26, and dye sensitized electrodes272829. On the other hand, ZnO nanostructures passivated with other semiconductors (TiO 2 , CdS, ZnS, InN, SiO 2 ) have also shown multifunctional applications3031323334. Significantly, in all cases, the passivation layer over ZnO nanostructures plays different roles, including: surface defect states neutralizer, environmental or chemical protector, carrier separator, absorbability enhancer, and electrical signal amplifier35.…”

Hierarchical graphene/CdS/Ag2S sandwiched nanofilms for photoelectrochemical water splitting

“…11 (B), it can be seen that an appropriate structure was obtained after energy level redistribution. It is obvious that the cascade structure was the stepwise positions of band edges based on the redistribution of CdS and Ag 2 S due to align Fermi levels [46][47][48]. Both the energy levels of the conduction band and the valence band of the CdS layer are lower than that of the Ag 2 S layer, therefore, a gradient energy level structures was formed in CdS/ Ag 2 S nanostructure.…”