Thin film transition metal dichalcogenide photoelectrodes for solar hydrogen evolution: a review

Abstract

Transition metal dichalcogenides (TMD: MoS2, MoSe2, WS2, WSe2) attracted much attention during the last decades as 2D-layered nanoparticles and thin films for renewable energy applications. The TMDs are not widely...

Transient Surface Photovoltage Spectroscopy of (NH4)2Mo3S13/WSe2 Thin-Film Photocathodes for Photoelectrochemical Hydrogen Evolution

“…The STH efficiency and PEC performance of WSe 2 thin films and single crystals compared to other materials were reported in the reveiw reports. 41,42 ■ CONCLUSIONS…”

“…To study the dependence of j on the wavelength of the light, incident photon-to-current efficiency (IPCE) was measured by a Zahner CIMPS PEC workstation equipped with a Zahner TLS03 tunable light source. The STH efficiency and PEC performance of WSe 2 thin films and single crystals compared to other materials were reported in the reveiw reports. , …”

Advancement of transition metal dichalcogenides for solar cells: a perspective

“…These reasons have been discussed in detail in our recent review report. 50 An intrinsic reason is the material limit connected with the internal physical and chemical properties. The main disadvantage is an inert connection between the building blocks of TMDs that have a conductivity 10 3 times higher along the van der Waals planes than that of a perpendicular direction.…”

“…Therefore, a solution for the mentioned problems can be a perpendicular growth (with c‖) of TMDs planes (rather than a parallel growth (with ct)), where the grain boundaries could be directly chemically connected to the back contact. 50,61 This conguration needs the elaboration of other methods and approaches, which is of great interest for the adaptation of TMDs for SCs.…”

Enhancing Hydrogen Evolution Reaction via Synergistic Interaction between the [Mo3S13]2– Cluster Co-Catalyst and WSe2 Photocathode

“…Herein, WSe 2 has been chosen as the photoactive cathode material because of its suitable band gap of 1.5–1.9 eV, a high optical absorption coefficient (∼10 5 cm –1 ), and a high catalytic ability for hydrogen evolution. − [Mo 3 S 13 ] 2– nanoclusters were then spin-coated on a WSe 2 photocathode which was previously prepared via an amorphous solid–liquid–crystalline solid (aSLcS) process. , After the nanocluster deposition, a photocurrent increase of over two orders of magnitude (from 0.02 to 2.8 mA/cm 2 ) at 0 V vs RHE was observed. To understand the underlying mechanisms, we applied various experimental methods, such as intensity-modulated photocurrent spectroscopy (IMPS), photoelectron yield spectroscopy (PYS), and theoretical calculations using density functional theory (DFT).…”