Ambipolar Organic Field‐Effect Transistors Based on a Solution‐Processed Methanofullerene

Organic field-effect transistors (OFETs, see Figure), based on the solution- processible methanofullerene [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), have been fabricated in a bottom-contact device configuration using gold electrodes. The OFET functions either as a p- or n-channel device, depending upon the bias conditions. This is the first example of ambipolar charge transport in FETs based on pristine PCBM.