| Grant number: | 15/24908-7 |
| Support Opportunities: | Regular Research Grants |
| Start date: | June 01, 2016 |
| End date: | August 31, 2018 |
| Field of knowledge: | Physical Sciences and Mathematics - Physics - Condensed Matter Physics |
| Principal Investigator: | Roberto Mendonça Faria |
| Grantee: | Roberto Mendonça Faria |
| Host Institution: | Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
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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