Organic Heterostructures with Indium‐Free Transparent Conductor Electrode for Optoelectronic Applications. Issue 15 (16th December 2021)

• Record Type: Journal Article
• Authors: Petre, Gabriela; Stanculescu, Anca; Girtan, Mihaela; Socol, Marcela; Breazu, Carmen; Vacareanu, Loredana; Preda, Nicoleta; Rasoga, Oana; Stanculescu, Florin; Doroshkevich, Aleksandr S.
• Other Names: Salazar Daniel guestEditor.; Yakoumis Iakovos guestEditor.; Grilli Maria Luisa guestEditor.
• Is Part Of: Physica status solidi. Volume 219:Issue 15(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-16
• Subjects: mixed layers -- organic heterostructures -- transparent conductor electrodes -- triple-layer electrodes -- ZnO/Ag/ZnO; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.202100521
• Languages: English
• ISSNs: 1862-6300

Abstract

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. Abstract : Organic heterostructures based on mixed active layer from arylenevinylene oligomer donor and perylene diimide derivative acceptor have been realized on triple‐layer transparent conductor electrode of ZnO/Ag/ZnO. The match between the absorption and photoluminescence domain and I‐V characteristics recommend these heterostructures for photodetection.