RT journal article
T1 A high-performance “fueled” photodetector based on few-layered 2D ternary chalcogenide NiGa2S4
A1 Serra, Marco
A1 Antonatos, Nikolas
A1 Luxa, Jan
A1 Lajaunie, Luc Cyrille Jacques
A1 Albero, Josep
A1 Sabik, Agata
A1 Linhart, Wojciech M.
A1 García, Hermenegildo
A1 Kudrawiec, Robert
A1 Sedmidubský, David
A1 Sofer, Zdenek
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 Chalcogenides
K1 Copper compounds
K1 Crystal structure
K1 Electrolytes
K1 Ethanol
K1 Gallium compounds
K1 Nickel compounds
K1 Photodetectors
K1 Photolysis
K1 Photons
K1 Transition metals
K1 Zinc compounds
AB Few-layered binary 2D transition metal chalcogenides have been comprehensively employed in photodetector systems thanks to their intrinsic band gap structure and a high in-plane charge carrier mobility. Their rich chemistry is further broadened when considering ternary 2D chalcogenide materials, giving the possibility to prepare isomorphic materials characterized by various metal distributions within the framework of a crystal structure. Whereas the “inverse” A(τ)B(Ω)(τ)2X4 hexagonal structures (e.g. ZnIn2S4) have been widely studied in photocatalysis, “normal” AII(Ω) BIII(τ)2XVI4 phases have not been considered so far. In this study, a NiGa2S4 photodetector has been prepared by drop-casting the exfoliated crystals onto ITO glass. Their photoresponse has been analyzed either in the absence or in the presence of an electron donor species (EtOH) in the electrolyte solution. Ethanol acts as a fuel in the PEC photodetector system boosting their performance by a factor of ∼x49 in terms of the responsivity at a given wavelength. Moreover, the spectral response is expanded from blue to far IR wavelengths, reaching responsivity values from 48 to 7 mA W−1. The dynamics of photogenerated electrons and holes has been studied using laser flash photolysis. The stability of the “fueled” PEC photodetector has been evaluated through long-term tests which have shown a stable response over extended periods. It is anticipated that the present work can provide fundamental insight into the field of PEC semiconductor-based photodetectors, offering an extendable strategy to engineer high-performance PEC devices.
PB Royal Society of Chemistry
SN 2050-7526
YR 2023
FD 2023-04-10
LK http://hdl.handle.net/10498/29635
UL http://hdl.handle.net/10498/29635
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 05-nov-2026