Rectifying and Photovoltaic Effects of Organic Hetero-Junction Films Based on Fluorenone Derivatives/Poly (3-Methylthiophene) Prepared by Electrochemical Polymerization and Undoping

Abstract

The eletrooxidative polymerization of 3-methylthiophene is a convenient method to synthesize an electroconducting polymer poly(3-methylthiophene) (PMeT) in form of a thin solid film incorporated by the counter anion from the supporting electrolytes as a dopant. Electropolymerized PMeT is konwn to be very stable toward oxygen, moisture and temperature in both their doped and undoped state. The thickness of these films, the amount of dopant and the properties of the films can be easily controlled electrochemically[1]. We have proposed dry organic hetero-junction devices based on electron transfer reaction between an organic dye molecule and PMeT [2]. Wet devices based on electron transfer reaction have been already accomplished by many reseachers, but these devices have complex structure. Our dry device is very simple. We expect that these devices should not behave like a conventional semiconductor device base on band theory and that they might be a next coming origanic molecular devices.