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Volume 14
Issue 24
10.3390/ma14247688
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Article

Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes

by
Anca Stanculescu
1,*,
Marcela Socol
1,
Oana Rasoga
1,
Carmen Breazu
1,
Nicoleta Preda
1,
Florin Stanculescu
2,
Gabriel Socol
3,
Loredana Vacareanu
4,
Mihaela Girtan
5 and
Aleksandr S. Doroshkevich
6
1
Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
2
Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania
3
Optical Processes in Nanostructured Materials Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG-36, 077125 Magurele, Romania
4
Electroactive Polymers and Plasmochemistry, P. Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487 Iasi, Romania
5
Laboratoire LPHIA, Université d’Angers, LUNAM 2, Bd. Lavoisier, 49045 Angers, France
6
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 141980 Dubna, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Dell’Era
Materials 2021, 14(24), 7688; https://doi.org/10.3390/ma14247688
Received: 2 November 2021 / Revised: 29 November 2021 / Accepted: 8 December 2021 / Published: 13 December 2021
(This article belongs to the Section Thin Films and Interfaces)
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Abstract

We investigated the optical and electrical properties of flexible single and bi-layer organic heterostructures prepared by vacuum evaporation with a p-type layer of arylenevinylene oligomers, based on carbazole, 3,3′ bis(N hexylcarbazole)vinylbenzene = L13, or triphenylamine, 1,4 bis [4 (N,N’ diphenylamino)phenylvinyl] benzene = L78, and an n-type layer of 5,10,15,20-tetra(4-pyrydil)21H,23H-porphyne = TPyP. Transparent conductor films of Al-doped ZnO (AZO) with high transparency, >90% for wavelengths > 400 nm, and low resistivity, between 6.9 × 10−4 Ω·cm and 23 × 10−4 Ω·cm, were deposited by pulsed laser deposition on flexible substrates of polyethylene terephthalate (PET). The properties of the heterostructures based on oligomers and zinc phthalocyanine (ZnPc) were compared, emphasizing the effect of the surface morphology. The measurements revealed a good absorption in the visible range of the PET/AZO/arylenevinylene oligomer/TPyP heterostructures and a typical injection contact behavior with linear (ZnPc, L78) or non-linear (L13) J-V characteristics in the dark, at voltages < 0.4 V. The heterostructure PET/AZO/L78/TPyP/Al showed a current density of ~1 mA/cm2 at a voltage of 0.3 V. The correlation between the roughness exponent, evaluated from the height-height correlation function, grain shape, and electrical behavior was analyzed. Consequently, the oligomer based on triphenylamine could be a promising replacement of donor ZnPc in flexible electronic applications. View Full-Text
Keywords: organic semiconductors; arylenevinylene oligomers; flexible heterostructures; ZnPc; TPyP; AZO organic semiconductors; arylenevinylene oligomers; flexible heterostructures; ZnPc; TPyP; AZO
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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MDPI and ACS Style

Stanculescu, A.; Socol, M.; Rasoga, O.; Breazu, C.; Preda, N.; Stanculescu, F.; Socol, G.; Vacareanu, L.; Girtan, M.; Doroshkevich, A.S. Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes. Materials 2021, 14, 7688. https://doi.org/10.3390/ma14247688

AMA Style

Stanculescu A, Socol M, Rasoga O, Breazu C, Preda N, Stanculescu F, Socol G, Vacareanu L, Girtan M, Doroshkevich AS. Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes. Materials. 2021; 14(24):7688. https://doi.org/10.3390/ma14247688

Chicago/Turabian Style

Stanculescu, Anca, Marcela Socol, Oana Rasoga, Carmen Breazu, Nicoleta Preda, Florin Stanculescu, Gabriel Socol, Loredana Vacareanu, Mihaela Girtan, and Aleksandr S. Doroshkevich. 2021. "Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes" Materials 14, no. 24: 7688. https://doi.org/10.3390/ma14247688

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