Thin Nanostructured n-WSe2 Films and Their Application in Semiconductor p-Si Photocathodes for Hydrogen Production by Water Splitting

— The possibilities of controlling the structure and type of conductivity of WSe 2 films formed on p-type silicon by thermal treatment of a thin-film precursor, which was preliminary obtained using pulsed laser deposition, are studied. Pulsed laser ablation of WSe 2 and rhenium targets make it possi...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic materials : applied research 2023-12, Vol.14 (5-6), p.1198-1206
Main Authors: Rubinkovskaya, O. V., Fominski, D. V., Nevolin, V. N., Romanov, R. I., Kartsev, P. F., Jiang, Hualing, Fominski, V. Yu
Format: Article
Language:English
Subjects:
Catalytic activity
Chemistry
Chemistry and Materials Science
Crystallization
Heat treatment
Hydrogen evolution
Hydrogen production
Inclusions
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Laser ablation
Low resistance
Materials Science
N-type semiconductors
Nanoparticles
Photocathodes
Physicochemical Foundations of Development of Materials and Technologies
Pulsed laser deposition
Pulsed lasers
Rhenium
Silicon
Thin films
Water splitting
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:— The possibilities of controlling the structure and type of conductivity of WSe 2 films formed on p-type silicon by thermal treatment of a thin-film precursor, which was preliminary obtained using pulsed laser deposition, are studied. Pulsed laser ablation of WSe 2 and rhenium targets make it possible to obtain amorphous films WSe x ( x > 2) containing rhenium atoms and inclusions of β-W nanoparticles. During heat treatment at 450°C, the amorphous matrix crystallization occurs, and a layered shell of 2H-WSe 2 is formed around the metal nanoparticles. Doping with rhenium leads to the production of n-type WSe 2 semiconductor films, which, in terms of their combination of properties (band gap ~1.2 eV, high catalytic activity, and low resistance to current flow), represent a promising material for creating p-Si photocathodes for efficient light-activated production of hydrogen in an acid solution. Theoretical calculations are carried out, which make it possible to identify local areas of the surface of the formed WSe 2 films with enhanced catalytic activity in the reaction of hydrogen evolution.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113323050404