Volume 219, Issue 15 2100521
Research Article

Organic Heterostructures with Indium-Free Transparent Conductor Electrode for Optoelectronic Applications

Gabriela Petre

Gabriela Petre

National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Magurele, 077125 Romania

Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, Magurele, 077125 Romania

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Anca Stanculescu

Corresponding Author

Anca Stanculescu

National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Magurele, 077125 Romania

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Mihaela Girtan

Mihaela Girtan

Laboratoire LPHIA, LUNAM, Université d’Angers, 2 Bd. Lavoisier, Angers, 49045 France

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Marcela Socol

Marcela Socol

National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Magurele, 077125 Romania

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Carmen Breazu

Carmen Breazu

National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Magurele, 077125 Romania

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Loredana Vacareanu

Loredana Vacareanu

Laboratory 7. Electroactive Polymers and Plasmochemistry, P. Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, Iasi, 700487 Romania

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Nicoleta Preda

Nicoleta Preda

National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Magurele, 077125 Romania

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Oana Rasoga

Corresponding Author

Oana Rasoga

National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, Magurele, 077125 Romania

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Florin Stanculescu

Florin Stanculescu

Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, Magurele, 077125 Romania

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Aleksandr S. Doroshkevich

Aleksandr S. Doroshkevich

Frank Laboratory of Neutron Physics (FLNP), Joint Institute for Nuclear Research, 6 Joliot-Curie Street, Dubna, 141980 Russia

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First published: 22 November 2021
Citations: 1

Abstract

Herein, the properties of the organic heterostructures with triple-layer ZnO/Ag/ZnO as a replacement for ITO and mixed layer containing arylenevinylene oligomer (based on triphenylamine or carbazole) donor and nonfullerene (perylene diimide) acceptor mixed in the ratio 1:2 and the effect of a buffer layer of PEDOT-PSS intercalated between triple layer and mixed organic layer are discussed. The UV−vis transmission and photoluminescence (PL) properties are investigated in correlation with the surface topography and reveal a good match between the absorption and emission domain, which can favor the generation of the charge carriers. The heterostructure with the mixed layer based on triphenylamine oligomer shows the widest absorption domain, and the PL spectra of the heterostructures realized with either triphenylamine or carbazole oligomer show peaks corresponding to the radiative decay of the donor and acceptor. The I−V characteristics in the dark indicate a slightly nonlinear behavior and the current is affected by the charge carriers recombination on the defects present in the thick mixed layer deposited by matrix-assisted pulsed laser evaporation. The effect of the PEDOT-PSS buffer layer on the electrical properties of the organic heterostructure with ZnO/Ag/ZnO electrode is also investigated.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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