Development and characterization of organic transistors comprising conjugated polymers and ionic conducting polymers

• Grant number: 09/16052-4
• Support Opportunities: Regular Research Grants
• Start date: April 01, 2010
• End date: March 31, 2012
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Lucas Fugikawa Santos
• Grantee: Lucas Fugikawa Santos
• Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil

Abstract

This project proposes the development of novel kind of organic electronic devices comprising conjugated polymers and ionic conducting polymers, in structures similar to organic field-effect transistors (OFETs). The main idea is to use polymeric blends comprising conjugated polymers derived from poly(p-phenylene vinylene), polythiophene and/or polyfluorene and ionic transporting polymers, as poly(ethylene oxide) complexed with different alkaline metals salts, as the device active layer. The purpose of using such blends is to reduce the injection barriers for electronic carriers through the electrodes, giving rise to the formation of an electrochemically doped region in the transistor channel, which doping level can be controlled by the bias applied to the transistor gate. Since electrochemical doping can occur either by reduction or by oxidation of the conjugated polymer, such devices are expected to show bipolar transport and can be used in CMOS-type (complementary metal oxide semicondutor) inverter devices. The devices will be electrically characterized by d.c. current-voltage measurements, by the characteristic transistor transfer curve and by electric impedance spectroscopy in the frequency domain. Particularly, impedance spectroscopy technique permits the separation the contribution of each type of carriers (electronic and ionic) to the electrical properties of the devices, allowing the determination of the parameters for improved device performance. (AU)

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)

SANTOS, L. F.; PEREIRA, C. J.. Phenomenological Interpretation of Impedance/Capacitance Measurements on Organic Electronic Devices Under Illumination. MOLECULAR CRYSTALS AND LIQUID CRYSTALS, v. 589, n. 1, p. 74-82, JAN 22 2014. (09/16052-4)