新規可溶性フラーレン誘導体C60MC12

フラーレン誘導体C60MC12は有機溶媒に可溶で，n型有機半導体材料として優れた特徴を有しています。デバイス作成時，層状に配向した構造を取り，0.4 cm²V^-1s^-1と大きな移動度を達成しています。この値はアモルファスシリコン有機電界効果型トランジスタのそれに匹敵するものです。

“High-Performance Solution-Processed n-Channel Organic Thin-Film Transistors Based on a Long Chain Alkyl-Substituted C60 Derivative”

Y. Horii, K. Sakaguchi, M. Chikamatsu, R. Azumi, K. Yase, M. Kitagawa, H. Konishi, Appl. Phys. Express 2010, 3, 101601. DOI: 10.1143/APEX.3.101601

We report on high-performance solution-processed n-channel organic thin-film transistors based on a long-chain alkyl-substituted fullerene derivative, C60-fused N-methylpyrrolidine-meta-dodecyl phenyl (C60MC12), by surface modification of an insulator. C60MC12 films were fabricated on self-assembled monolayer (SAM)-treated gate insulators by spin-coating, which was facilitated by hydrophilic patterning of the edge of the substrate. X-ray diffraction revealed that the crystallinity of C60MC12 films was improved by SAM treatment. The octadecyltrichlorosilane-treated device demonstrated a high mobility of 0.4?0.5 cm2 V-1 s-1, which is comparable with those of amorphous silicon thin-film transistors. An improvement in bias stress stability by the SAM treatment was also observed.