Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	PEDOT: PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
Δημιουργός/Συγγραφέας:	Verykios, Apostolis Pistolis, Giorgos Bizas, Lambros Tselios, Charalambos Tsikritzis, Dimitris Kennou, Stella [EL] Χώχος, Χρήστος[EN] Chochos, Christos Mouzakis, Dionysis E. Skandamis, Panagiotis N. Rashid bin Mohd Yusoff, Abd Palilis, Leonidas C. Argitis, Panagiotis Vasilopoulou, Maria Soultati, Anastasia
Εκδότης:	Elsevier
Ημερομηνία:	2021
Γλώσσα:	Αγγλικά
ISSN:	15661199
DOI:	10.1016/j.orgel.2021.106155
Περίληψη:	In this work, we propose a simple and effective approach to modify the optoelectronic properties of the commonly used poly(3,4-ethylenedioxylthiophene):poly(styrene sulfonate) (PEDOT:PSS) and consequently to improve hole injection and transport in organic light emitting diodes (OLEDs) using emissive layers based on a fluorescence copolymer. In particular, two triphenylsulfonium (TPS) salts that consist of the same TPS cation and two different counter anions, in particular, hexafluoroantimonate (SbF6) and trifluoromethane sulfonate (Triflate) were added in the PEDOT:PSS solution in various concentrations and the composite films were fully characterized for surface and optoelectronic properties and subsequently we employed as hole injection layers (HILs) in OLEDs. It is demonstrated that both, the counter anion and the concentration of TPS-salts in the PEDOT:PSS matrix play significant role in the optoelectronic properties of the composite and thus in the device performance. Although all TPS-salt modified PEDOT:PSS films exhibited higher work function (WF) values relative to the undoped one thus resulting in more efficient hole injection than pristine PEDOT:PSS, the PEDOT:PSS:TPS-Triflate with the lower concentration (10:1 v/v) showed the highest luminous (LE) and power efficiency (PE) values of 27.04 cd A−1 and 6.26 lm W−1, respectively. This extraordinary performance was ascribed to a significant increase in the conductivity of the composite film combined with the formation of an interface exciplex between the TPS-Triflate (acceptor) and the emissive copolymer (donor). This interfacial electroplex strongly confines the generated excitons and prevents their diffusion towards aluminum cathode which acts as exciton quencher.
Τίτλος πηγής δημοσίευσης:	Organic Electronics
Τόμος/Κεφάλαιο:	93
Σελίδες:	106155
Θεματική Κατηγορία:	[EL] Χημική τεχνολογία[EN] Chemical technolgy [EL] Φασματοσκοπία[EN] Spectroscopy [EL] Οπτική. Φώς[EN] Optics. Light [EL] Ηλεκτρονική[EN] Electronics
Λέξεις-Κλειδιά:	Triphenylsulfonium salt PEDOT:PSS Hole injection layer Organic light emitting diodes Interface engineering
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2021 Elsevier B.V. All rights reserved.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://www.sciencedirect.com/science/article/abs/pii/S156611992100094X?via%3Dihub
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://www.sciencedirect.com/journal/organic-electronics
Εμφανίζεται στις συλλογές:	Ινστιτούτο Χημικής Βιολογίας - Επιστημονικό έργο