Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Methylammonium Lead Bromide Perovskite Nano-Crystals Grown in a Poly[styrene-co-(2-(dimethylamino)ethyl Methacrylate)] Matrix Immobilized on Exfoliated Graphene Nano-Sheets
Δημιουργός/Συγγραφέας:	Stergiou, Anastasios Sideri, Ioanna K. Kafetzi, Martha Ioannou, Anna Arenal, Raul [EL] Μούσδης, Γεώργιος Α.[EN] Mousdis, George A. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Ημερομηνία:	2022-04-08
Γλώσσα:	Αγγλικά
ISSN:	2079-4991
DOI:	10.3390/nano12081275
Άλλο:	35457979
Περίληψη:	Development of graphene/perovskite heterostructures mediated by polymeric materials may constitute a robust strategy to resolve the environmental instability of metal halide perovskites and provide barrierless charge transport. Herein, a straightforward approach for the growth of perovskite nano-crystals and their electronic communication with graphene is presented. Methylammonium lead bromide (CH3NH3PbBr3) nano-crystals were grown in a poly[styrene-co-(2-(dimethylamino)ethyl methacrylate)], P[St-co-DMAEMA], bi-functional random co-polymer matrix and non-covalently immobilized on graphene. P[St-co-DMAEMA] was selected as a bi-modal polymer capable to stabilize the perovskite nano-crystals via electrostatic interactions between the tri-alkylamine amine sites of the co-polymer and the A-site vacancies of the perovskite and simultaneously enable Van der Waals attractive interactions between the aromatic arene sites of the co-polymer and the surface of graphene. The newly synthesized CH3NH3PbBr3/co-polymer and graphene/CH3NH3PbBr3/co-polymer ensembles were formed by physical mixing of the components in organic media at room temperature. Complementary characterization by dynamic light scattering, microscopy, and energy-dispersive X-ray spectroscopy revealed the formation of uniform spherical perovskite nano-crystals immobilized on the graphene nano-sheets. Complementary photophysical characterization by UV-Vis absorption, steady-state, and time-resolved fluorescence spectroscopy unveiled the photophysical properties of the CH3NH3PbBr3/co-polymer colloid perovskite solution and verified the electronic communication within the graphene/CH3NH3PbBr3/co-polymer ensembles at the ground and excited states.
Τίτλος πηγής δημοσίευσης:	Nanomaterials (Basel, Switzerland)
Τόμος/Κεφάλαιο:	12
Τεύχος:	8
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Νανοτεχνολογία[EN] Nanotechnology [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	defect passivation free radical polymerization graphene functionalization methylammonium lead bromide perovskite nano-crystals
EU Grant:	Advanced Materials and Devices Competitiveness, Entrepreneurship and Innovation Spanish MICINN Project Government of Aragon project DGA ESTEEM3 Graphene Flagship CORE3
EU Grant identifier:	MIS 5002409 NSRF 2014–2020 PID2019-104739GB-100/AEI/10.13039/501100011033 DGA E13-20R 823717 881603
Κάτοχος πνευματικών δικαιωμάτων:	© 2022 by the authors. Licensee MDPI, Basel, Switzerland
Όροι και προϋποθέσεις δικαιωμάτων:	This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/)
Ηλεκτρονική διεύθυνση στον εκδότη (link):	file:///C:/Users/Katerina/Downloads/nanomaterials-12-01275-v3.pdf
Σημειώσεις:	supporting information: https://www.mdpi.com/article/10.3390/nano12081275/s1 Support of this work by the project “Advanced Materials and Devices” MIS 5002409 which is implemented under the “Action for the Strategic Development on the Research and Technological Sector” funded by the Operational Program “Competitiveness, Entrepreneurship and Innovation” (NSRF 2014–2020) and co-financed by Greece and the European Union (European Regional Development Fund) is acknowledged. The HRSTEM and EDS-STEM measurements were performed in the Laboratorio de Microscopias Avanzadas (LMA) at the Universidad de Zaragoza (Spain). R.A. acknowledges funding from the Spanish MICINN (project grant PID2019-104739GB-100/AEI/10.13039/501100011033), from the Government of Aragon (project DGA E13-20R) and European Union H2020 programs “ESTEEM3” (823717) and Graphene Flagship CORE3 (881603).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο