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STUDIES OF OXYGEN ATMOSPHERE EFFECTS ON ELECTRONIC TRANSPORT IN ORGANIC PHOTOVOLTAIC DEVICES

Abstract

Research on organic solar cells is now one of the main segments of the area of Organic Electronics, being the bulk heterojunction (BHJ) photovoltaic structure a promising device for converting solar energy into electric energy. This combination, donor-acceptor, forms a very interesting system from the electronic point of view. However, to increase the efficiency of these devices, it is necessary a detailed study of the dissociation processes of photogenerated excitons, the recombination phenomena and the electronic transport, as well as the collection of charges by the electrodes. In this project, we intend to use Foto-CELIV technique, transient photocurrent of termoestimulated current measurements, as well as time-resolved spectroscopy to study the influence of localized states (traps) on the electrical properties of organic bulk heterojunction photovoltaic device type. We shall use as an active layer the blend rr-P3HT: PCBM, and will perform the studies by varying the molar ratio ranging from 0 to 100% of PCBM on the total blend composition. We explore alternative structures with PBDTT-FTTE polymer and PC71BM molecule. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MOTTI, SILVIA G.; CARDOSO, LILIAN S.; GOMES, DOUGLAS J. C.; FARIA, ROBERTO M.; MIRANDA, PAULO B.. Probing Device Degradation and Electric Fields in Polymeric Field-Effect Transistors by SFG Vibrational Spectroscopy. Journal of Physical Chemistry C, v. 122, n. 19, p. 10450-10458, . (15/24908-7, 13/07328-1, 14/50869-6, 14/01595-0)

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