Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Self-Assembled Core-Shell CdTe/Poly(3-hexylthiophene) Nanoensembles as Novel Donor-Acceptor Light-Harvesting Systems
Δημιουργός/Συγγραφέας:	Istif E. Kagkoura A. Hernandez-Ferrer J. Stergiou A. Skaltsas T. Arenal R. Benito A.M. Maser W.K. [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Εκδότης:	American Chemical Society
Ημερομηνία:	2017
Γλώσσα:	Αγγλικά
ISSN:	1944-8244
DOI:	10.1021/acsami.7b13506
Άλλο:	PubMed ID: 29214807
Περίληψη:	The self-assembly of novel core-shell nanoensembles consisting of regioregular poly(3-hexylthiophene) nanoparticles (P3HTNPs) of 100 nm as core and semiconducting CdTe quantum dots (CdTeQDs) as shell with a thickness of a few tens of nanometers was accomplished by employing a reprecipitation approach. The structure, morphology, and composition of CdTeQDs/P3HTNPs nanoensembles were confirmed by high-resolution scanning transmission microscopy and dynamic light-scattering studies. Intimate interface contact between the CdTeQDs shell and the P3HTNPs core leads to the stabilization of the CdTeQDs/P3HTNPs nanoensemble as probed by the steady-state absorption spectroscopy. Effective quenching of the characteristic photoluminescence of CdTeQDs at 555 nm, accompanied by simultaneous increase in emission of P3HTNPs at 660 and 720 nm, reveals photoinduced charge-transfer processes. Probing the redox properties of films of CdTeQDs/P3HTNPs further proves the formation of a stabilized core-shell system in the solid state. Photoelectrochemical assays on CdTeQDs/P3HTNPs films show a reversible on-off photoresponse at a bias voltage of +0.8 V with a 3 times increased photocurrent compared to CdTeQDs. The improved charge separation is directly related to the unique core-shell configuration, in which the outer CdTeQDs shell forces the P3HTNPs core to effectively act as electron acceptor. The creation of novel donor-acceptor core-shell hybrid materials via self-assembly is transferable to other types of conjugated polymers and semiconducting nanoparticles. This work, therefore, opens new pathways for the design of improved optoelectronic devices.
Τίτλος πηγής δημοσίευσης:	ACS Applied Materials and Interfaces
Τόμος/Κεφάλαιο:	9
Τεύχος:	51
Σελίδες:	44695-44703
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	core-shell nanoparticles donor-acceptor nanoensembles energy conversion polymer nanoparticles quantum dots
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2017 American Chemical Society.
Όροι και προϋποθέσεις δικαιωμάτων:	All Open Access, Green
Σημειώσεις:	Horizon 2020 Framework Programme, H2020: 642742; Ministerio de Economía y Competitividad, MINECO: ENE2016-79282-C5-1-R; European Social Fund, ESF: DGA-E26, MAT2016-79776-P; European Regional Development Fund, FEDER: DGA-T66 This work has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska−Curie grant agreement No. 642742. A.M.B. and W.K.M. gratefully acknowledge the financial support from Spanish MINECO under project ENE2016-79282-C5-1-R and its associated European Regional Development Fund, as well as the Government of Aragon under project DGA-T66 and associated European Social Fund. R.A. gratefully acknowledges financial support from Spanish MINECO under project MAT2016-79776-P and its associated European Regional Development Fund, as well as the Government of Aragon under project DGA-E26 and associated European Social Fund.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο