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Cited by 49Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchPorphyrin and Phthalocyanine Chemistry

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Large work function shift of organic semiconductors inducing enhanced interfacial electron transfer in organic optoelectronics enabled by porphyrin aggregated nanostructures

Vasilopoulou, Maria, Douvas, Antonios M., Georgiadou, Dimitra G., Constantoudis, Vassilios, Davazoglou, Dimitris, Kennou, Stella, Palilis, Leonidas C., Daphnomili, Dimitra, Coutsolelos, Athanassios G., Argitis, Panagiotis·2014·Nano Research
DOI 10.1007/s12274-014-0428-9
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Abstract

We report on large work function shifts induced by the coverage of several organic semiconducting (OSC) films commonly used in organic light emitting diodes (OLEDs) and organic photovoltaics (OPVs) with a porphyrin aggregated layer. The insertion between the organic film and the aluminum cathode of an aggregated layer based on the meso-tetrakis(1-methylpyridinium-4-yl) porphyrin chloride (porphyrin 1 ), with its molecules adopting a face-to-face orientation parallel to the organic substrate, results in a significant shift of the OSC work function towards lower values due to the formation of a large interfacial dipole and induces large enhancement of either the OLED or OPV device efficiency. OLEDs based on poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(1,4-benzo-2,1′,3-thiadiazole)] (F8BT) and incorporating the porphyrin 1 at the cathode interface exhibited current efficiency values up to 13.8 cd/A, an almost three-fold improvement over the efficiency of 4.5 cd/A of the reference device. Accordingly, OPVs based on poly(3-hexylthiophene) (P3HT), [6,6]-phenyl-C 61 butyric acid methyl ester (PC 61 BM) and porphyrin 1 increased their external quantum efficiencies to 4.4% relative to 2.7% for the reference device without the porphyrin layer. The incorporation of a layer based on the zinc meso-tetrakis (1-methylpyridinium-4-yl)porphyrin chloride (porphyrin 2 ), with its molecules adopting an edge-to-edge orientation, also introduced improvements, albeit more modest in all cases, highlight…

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  • J2 adopted a face-to-face molecular orientation parallel to the substrate, while J3 self-assembled with the edge-to-edge molecular orientation.

    “where J2 adopted a face-to-face molecular orientation parallel to the substrate, while J3 self-assembled with the edge-to-edge molecular orientation.”

    From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [153]

  • Efficiency increased from initial 2.6% to 4.8% with addition of J2 and to 3.6% with J3 in P3HT:PC61BM OSCs.

    “The e ffi ciency increased from initial 2.6% to 4.8% and 3.6% with the addition of J2 and J3 , respectively”

    From Recent progress in porphyrin-based materials for organic solar cells (2018) · cites this paper as [153]

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Authors
Vasilopoulou, M., Douvas, A. M., Georgiadou, D. G., Constantoudis, V., Davazoglou, D., Kennou, S., Palilis, L. C., Daphnomili, D., Coutsolelos, A. G., & Argitis, P.
Affiliations
  • National Centre of Scientific Research "Demokritos" (GR)
  • University of Patras (GR)
  • University of Crete (GR)
Corresponding author
Vasilopoulou, Maria
ORCID
Venue
Nano Research
Publisher
Tsinghua University Press
Published
2014-03-27
Volume
7
Issue
5
Pages
679-693
ISSN
  • 1998-0000 (ISSN-L)
  • 1998-0124
DOI
10.1007/s12274-014-0428-9
OpenAlex
W2394746521
Cited by
49
References
1
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 4 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 5 · 2018: 9 · 2017: 5 · 2016: 9 · 2015: 4 · 2014: 2
FWCI
3.54
Type
journal article
Language
en
Open access
closed
Licence
www.springer.com/tdm (tdm)
Locations
  • Nano Research (publishedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
  • Physical Sciences › Materials Science › Materials Chemistry › Porphyrin and Phthalocyanine Chemistry
Keywords
work function change, interfacial electron transfer, organic semiconductors, organic light-emitting diodes, organic solar cells, interface dipole, cathode interlayer, molecular orientation, zinc porphyrin, F8BT, P3HT:PC61BM, external quantum efficiency

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