Organic-inorganic p -type PEDOT:PSS/CuO/MoS 2 photocathode with in-built antipodal photogenerated holes and electrons transfer pathways for efficient solar-driven photoelectrochemical water splitting
Sustainable Materials and Technologies, ISSN: 2214-9937, Vol: 38, Page: e00749
2023
- 9Citations
- 10Captures
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Article Description
Organic PEDOT:PSS thin film and n -type MoS 2 flakes were incorporated on CuO photocathode as the underlying layer and surface co-catalysts, respectively, establishing a rationally-designed novel integrated structure of PEDOT:PSS/CuO/MoS 2. The organic-inorganic interface of PEDOT:PSS/CuO effectively shuttles photogenerated holes towards the FTO/PEDOT:PSS junction. Furthermore, the surface MoS 2 co-catalysts form a p - n junction with CuO, which accelerates the transport of photogenerated electrons towards the photocathode/electrolyte junction, in addition to providing more reactive sites for the H 2 evolution reaction. These synergistically formed antipodal charge transfer pathways have led to improved charge separation, rapid interfacial charge transfer kinetics and impeded electron-hole recombination in the PEDOT:PSS/CuO/MoS 2 photocathode, which can achieve a photocurrent density of – 2.26 mA/cm 2 at −0.6 V vs Ag/AgCl (2.1 times higher than that of the bare CuO photocathode). Analytical characterisations, electrochemical impedance spectroscopy (EIS) and intensity-modulated photocurrent spectroscopy (IMPS), also provide supporting evidence for its dramatically enhanced PEC water splitting performance.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S2214993723001847; http://dx.doi.org/10.1016/j.susmat.2023.e00749; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85173576247&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S2214993723001847; https://dx.doi.org/10.1016/j.susmat.2023.e00749
Elsevier BV
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