Study of the composite P3HT:PCBM properties as a function of the annealing temperature with impedance spectroscopy

• Grant number: 11/19865-6
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: February 01, 2012
• End date: December 31, 2012
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Ernesto Chaves Pereira de Souza
• Grantee: Luís Fernando Quintino Pereira Marchesi
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

The search for renewable alternative energies has become necessary and it is currently the subject of many research groups in the world. This is why the research in solar cells field, among other sources of renewable alternative energies, has gained an important focus in recent years. Therefore, understanding the behavior and the mechanisms of such devices is of fundamental importance for the improvement and future marketing of these products. In this context, this project aims to study the changes in electrochemical, physical and photochemical properties of both, ITO/P3HT:PCBM electrodes and the photovoltaic devices, when they are subjected to different annealing conditions. The impedance spectroscopy will be used as the main characterization technique, since this technique is very powerful in elucidating the mechanisms of such devices, such as generation of photoelectrons, recombination and charge separation, as well as techniques like scanning electron and atomic force microscopies and X-ray diffraction. Therewith, we aim to have a new vision of these mechanisms as a function of different annealing conditions of the active layer, as well as to better understand the relationship of the photocurrent and the photopotential with the active layer morphology.

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)

PEREIRA, R.; MARCHESI, L. F.; FREITAS, R. G.; MATOS, R.; PEREIRA, E. C.. A low-cost platinum film deposited direct on glass substrate for electrochemical counter electrodes. Journal of Power Sources, v. 232, p. 254-257, JUN 15 2013. (11/19865-6, 10/05555-2)

MARCHESI, L. F.; PEREIRA, E. C.. The influence of the drying process on electrochemical properties of P3HT/PCBM (1.00/0.25 wt%) electrodes. Synthetic Metals, v. 194, p. 82-87, AUG 2014. (11/19865-6)