Effect of charge selective contacts on the quasi Fermi level splitting of CuGa<sub>3</sub>Se<sub>5</sub> thin film photocathodes for hydrogen evolution and methylviologen reduction
Ye Cheng, Chengcan Xiao, Behzad Mahmoudi, Roland Scheer, A. Wouter Maijenburg, Frank E. Osterloh
Abstract
The defect-copper chalcopyrite CuGa 3 Se 5 is a promising photocathode material for solar hydrogen generation. Here we assess its performance with photoelectrochemical measurements and vibrating Kelvin probe surface photovoltage spectroscopy.
Topics & Concepts
PhotocathodeSurface photovoltageHydrogenFermi levelChalcopyriteMaterials scienceCopperThin filmSpectroscopyPhotoelectrochemical cellOptoelectronicsAtomic physicsChemistryElectronElectrodeNanotechnologyPhysicsElectrolytePhysical chemistryMetallurgyQuantum mechanicsOrganic chemistryChalcogenide Semiconductor Thin FilmsCopper-based nanomaterials and applicationsIron oxide chemistry and applications