The PRI-AIST has succeeded in synthesizing a new fullerene derivative, C60-fused pyrrolidinemeta-C12 phenyl (C60MC12), by incorporating alkyl chain to fullerene (C60). C60MC12 is soluble in organic solvent, and found to constitute a good quality crystalline thin film by simple spin coating where fullerene heads self-aggregate to form layered structure.

An organic TFT has been prepared by using newly synthesized fullerene derivative C60MC12 for organic semiconductor layer, and characterized. The electron mobility is as high as 0.067 cm²/Vs, which is the highest value for n-type organic semiconductor prepared through coating process (figure).