Influence of SnWO, SnWO, and WO Phases in Tin Tungstate Films on Photoelectrochemical Water Oxidation.

An essential step toward enabling the production of renewable and cost-efficient fuels is an improved understanding of the performance of energy conversion materials. In recent years, there has been growing interest in ternary metal oxides. Particularly, α-SnWO exhibited promising properties for application to photoelectrochemical (PEC) water splitting.

Transient Surface Photovoltage Spectroscopy of (NH)MoS/WSe Thin-Film Photocathodes for Photoelectrochemical Hydrogen Evolution.

Hydrogen produced from solar energy has the potential to replace petroleum in the future. To this respect, there is a need in the abandoned and efficient materials that can continuously split water molecules using solar energy. In this report, an ammonium thiomolybdate (ATM: (NH)MoS) is evaluated as a p-type semiconductor film photocathode for hydrogen evolution reaction.

Charge Transfer in c-Si(n)/TiO(ALD) at the Amorphous/Anatase Transition: A Transient Surface Photovoltage Spectroscopy Study.

Electronic properties and charge transfer processes were studied in an n-Si(n)/TiO(ALD) system at an amorphous TiO/anatase transition by transient surface photovoltage spectroscopy at constant photon flux. The TiO layers were deposited by atomic layer deposition (ALD) onto highly doped silicon (c-Si(n)), and the phase composition of the TiO layers changed with increasing thickness from amorphous to the anatase polymorph as anatase crystallites started to grow at the surface. Depending on phase composition, the band gap of TiO correlated with the characteristic energy of exponential tails.

Manipulation of Charge Transport by Metallic V O Decorated on Bismuth Vanadate Photoelectrochemical Catalyst.

Conductive metal oxides represent a new category of functional material with vital importance for many modern applications. The present work introduces a new conductive metal oxide V O , which is synthesized via a simplified photoelectrochemical procedure and decorated onto the semiconducting photocatalyst BiVO in controlled mass percentages ranging from 25% to 37%. Owing to its excellent conductivity and good compatibility with oxide materials, the metallic V O -decorated BiVO hybrid catalyst shows a high photocurrent density of 2.

Transient surface photovoltage measurement over 12 orders of magnitude in time.

The measurement of transient surface photovoltage (SPV) signals in a fixed capacitor arrangement over 12 orders of magnitude in time has been demonstrated for a SnO:F/TiO/InS layer system under high vacuum. For this purpose, a high impedance buffer with a bandwidth above 200 MHz and an effective input resistance of 200-700 TΩ has been developed. Fast separation of photo generated charge carriers within ns and very slow relaxation of SPV signals excited with short laser pulses and the measurement of SPV spectra under continuous illumination with a halogen lamp were demonstrated.

Surface aspects of sol-gel derived hematite films for the photoelectrochemical oxidation of water.

α-Fe(2)O(3) (hematite) photoanodes for the oxygen evolution reaction (OER) were prepared by a cost-efficient sol-gel procedure. Due to low active photoelectrochemical properties observed, it is assumed that the sol-gel procedure leads to hematite films with defects and surface states on which generated charge carriers are recombined or immobilized in trap processes. Electrochemical activation was proven to diminish unfavourable surface groups to some extent.