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PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes

Apostolis Verykios, Giorgos Pistolis, Lambros Bizas, Charalambos Tselios, Dimitris Tsikritzis, Stella Kennou, Christos L. Chochos, Dionysis E. Mouzakis, Panagiotis N. Skandamis, RASHID MOHD YUSOFF, Leonidas C. Palilis, Panagiotis Argitis, Maria Vasilopoulou, Anastasia Soultati

Organic Electronics, Volume: 93, Start page: 106155

Swansea University Author: RASHID MOHD YUSOFF

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DOI (Published version): 10.1016/j.orgel.2021.106155

Abstract

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...

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Published in: Organic Electronics
ISSN: 1566-1199
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa57078
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spelling 2021-08-12T18:31:11.0125453 v2 57078 2021-06-09 PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes 9c1236b776cfe557fea0d7f75de15b01 RASHID MOHD YUSOFF RASHID MOHD YUSOFF true false 2021-06-09 SPH 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. Journal Article Organic Electronics 93 106155 Elsevier BV 1566-1199 Triphenylsulfonium salt; PEDOT:PSS; Hole injection layer; Organic light emitting diodes; Interface engineering 1 6 2021 2021-06-01 10.1016/j.orgel.2021.106155 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University Hellenic Foundation for Research and Innovation Grant: 356.0001 Identifier: FundRef https://doi.org/10.13039/501100013209 First Call for H.F.R.I. Research Projects 2021-08-12T18:31:11.0125453 2021-06-09T18:05:24.5327039 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Apostolis Verykios 1 Giorgos Pistolis 2 Lambros Bizas 3 Charalambos Tselios 4 Dimitris Tsikritzis 5 Stella Kennou 6 Christos L. Chochos 7 Dionysis E. Mouzakis 8 Panagiotis N. Skandamis 9 RASHID MOHD YUSOFF 10 Leonidas C. Palilis 11 Panagiotis Argitis 12 Maria Vasilopoulou 13 Anastasia Soultati 14
title PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
spellingShingle PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
RASHID MOHD YUSOFF
title_short PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
title_full PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
title_fullStr PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
title_full_unstemmed PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
title_sort PEDOT:PSS:sulfonium salt composite hole injection layers for efficient organic light emitting diodes
author_id_str_mv 9c1236b776cfe557fea0d7f75de15b01
author_id_fullname_str_mv 9c1236b776cfe557fea0d7f75de15b01_***_RASHID MOHD YUSOFF
author RASHID MOHD YUSOFF
author2 Apostolis Verykios
Giorgos Pistolis
Lambros Bizas
Charalambos Tselios
Dimitris Tsikritzis
Stella Kennou
Christos L. Chochos
Dionysis E. Mouzakis
Panagiotis N. Skandamis
RASHID MOHD YUSOFF
Leonidas C. Palilis
Panagiotis Argitis
Maria Vasilopoulou
Anastasia Soultati
format Journal article
container_title Organic Electronics
container_volume 93
container_start_page 106155
publishDate 2021
institution Swansea University
issn 1566-1199
doi_str_mv 10.1016/j.orgel.2021.106155
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description 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.
published_date 2021-06-01T04:12:32Z
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score 11.03559

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