Anomalous photocurrent characteristics in fullerene C60 thin film-based organic field-effect transistors under illumination

A simple device topology is presented in Fig. 1. The curve in Fig. 2 show that photocurrent tend to increase first, and then decrease with the increase of incident optical power. Furthermore, we confirm that the phenomenon of anomalous photocurrent is observed in devices with Au, Cu, Al and Ag electrode respectively, which indicates that the main sources of the anomalous photocurrent characteristics phenomenon is not the electrodes but a distinct optoelectronic property of the C60 material itself. We clarify the phenomenon of anomalous photocurrent resulting from photoinduced denaturation. This mechanism of photocurrent make it possible to open new applications research based on C60 thin film.