Advanced Functional Materials

Cover image for Vol. 25 Issue 4

18_19/2008Cover Picture: Highly Sensitive, Photocontrolled, Organic Thin-Film Transistors Using Soluble Star-shaped Conjugated Molecules (Adv. Funct. Mater. 19/2008)

Highly photosensitive characteristics of organic thin film transistors (OTFTs) are reported for soluble star-shaped oligothiophenes with four π-conjugated arms. Organic phototransistors (OPTs) using 4(HPBT)-benzene exhibited high photosensitivity even at low optical powers. Using a high ratio of on-and-off current switching with low optical power, a reproducible memory operation for the OPTs is performed. The cover image shows photosensitive OTFTs using soluble star-shaped 4(HPBT)-benzene molecules, as reported on p. 2905 by Cho and co-workers.

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