Highly (001)-textured p-type WSe₂ Thin Films as Efficient Large-Area Photocathodes for Solar Hydrogen Evolution.

ABSTRACT: Highly (001)-textured, photoactive WSe₂ thin films have been prepared by an amorphous solid-liquid-crystalline solid process promoted by palladium. By increasing the thickness of the Pd promoter film (≥10 nm) the structure and texture of the WSe₂ films can be improved significantly. However, these as-crystallized WSe₂ films are only weakly photoactive in a 0.5 М H₂SO₄ electrolyte under AM 1.5 solar irradiation which we attribute to an inefficient photogenerated charge transfer across the WSe₂/electrolyte interface via the prevailing van der Waals planes of the WSe₂ crystallites. In this work photochemically deposited platinum on the p-type WSe₂ photocathode is used for an efficient electron transfer thu

SUBMITTER: Bozheyev F 

PROVIDER: S-EPMC5700039 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature