A high-performance “fueled” photodetector based on few-layered 2D ternary chalcogenide NiGa2S4

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927507" target="_blank" >RIV/60461373:22310/23:43927507 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlehtml/2023/tc/d3tc00508a" target="_blank" >https://pubs.rsc.org/en/content/articlehtml/2023/tc/d3tc00508a</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d3tc00508a" target="_blank" >10.1039/d3tc00508a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A high-performance “fueled” photodetector based on few-layered 2D ternary chalcogenide NiGa2S4

Popis výsledku v původním jazyce

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. © 2023 The Royal Society of Chemistry.

Název v anglickém jazyce

A high-performance “fueled” photodetector based on few-layered 2D ternary chalcogenide NiGa2S4

Popis výsledku anglicky

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. © 2023 The Royal Society of Chemistry.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/LL2101" target="_blank" >LL2101: Příští Generace Monoelementárních 2D Materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

2050-7534

Svazek periodika

11

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

6317-6326

Kód UT WoS článku

000980541900001

EID výsledku v databázi Scopus

2-s2.0-85158073261