Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Integrating Water-Soluble Polythiophene with Transition-Metal Dichalcogenides for Managing Photoinduced Processes
Δημιουργός/Συγγραφέας:	Canton-Vitoria, Ruben Istif, Emin Hernández-Ferrer, Javier Urriolabeitía, Esteban Benito, Ana M. Maser, Wolfgang K. [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Εκδότης:	American Chemical Society
Ημερομηνία:	2019
Γλώσσα:	Αγγλικά
ISSN:	1944-8244 1944-8252
DOI:	10.1021/acsami.8b18435
Άλλο:	30666865
Περίληψη:	Transition-metal dichalcogenides (TMDs) attract increased attention for the development of donor–acceptor materials enabling improved light harvesting and optoelectronic applications. The development of novel donor–acceptor nanoensembles consisting of poly(3-thiophene sodium acetate) and ammonium functionalized MoS2 and WS2 was accomplished, while photoelectrochemical cells were fabricated and examined. Attractive interactions between the negatively charged carboxylate anion on the polythiophene backbone and the positively charged ammonium moieties on the TMDs enabled in a controlled way and in aqueous dispersions the electrostatic association of two species, evidenced upon titration experiments. A progressive quenching of the characteristic fluorescence emission of the polythiophene derivative at 555 nm revealed photoinduced intraensemble energy and/or electron transfer from the polymer to the conduction band of the two TMDs. Photoelectrochemical assays further confirmed the establishment of photoinduced charge-transfer processes in thin films, with distinct responses for the MoS2- and WS2-based systems. The MoS2-based ensemble exhibited enhanced photoanodic currents offering additional channels for hole transfer to the solution, whereas the WS2-based one displayed increased photocathodic currents providing supplementary pathways of electron transfer to the solution. Moreover, scan direction depending on photoanodic and photocathodic currents suggested the existence of yet unexploited photoinduced memory effects. These findings highlight the value of electrostatic interactions for the creation of novel donor–acceptor TMD-based ensembles and their relevance for managing the performance of photoelectrochemical and optoelectronic processes.
Τίτλος πηγής δημοσίευσης:	ACS Applied Materials and Interfaces
Τόμος/Κεφάλαιο:	11
Τεύχος:	6
Σελίδες:	5947-5956
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General)
Λέξεις-Κλειδιά:	Transition-metal dichalcogenides Polythiophenes Functionalization Electrostatic interactions Photophysics
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
EU Grant:	Horizon 2020 Framework Programme, H2020
EU Grant identifier:	642742
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © American Chemical Society
Όροι και προϋποθέσεις δικαιωμάτων:	This is the author’s manuscript and appears in: "ACS Appl. Mater. Interfaces 2019, 11, 6, 5947–5956 Publication Date:January 22, 2019”. The definite version can be found at: https://pubs.acs.org/doi/10.1021/acsami.8b18435
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://pubs.acs.org/doi/10.1021/acsami.8b18435
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://pubs.acs.org/journal/aamick
Σημειώσεις:	All Open Access, Green
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο