The author reports on light-sensing ambipolar organic field-effect transistors (LS-OFETs) based on blends of[6,6]-phenyl- C61 -butyric acid methyl ester and poly [2-methoxy-5- (3′, 7′ -dimethyloctyloxy)]- p -phenylene vinylene. By carefully tuning the ambipolar transport character of the LS-OFETs, their photoresponsivity can be controlled and optimized. By combining LS-OFETs with ordinary unipolar organic transistors, fabrication of electro-optical switches and logic circuits, such as NOT and OR gates, is demonstrated. This is the only report of organic electro-optical circuits in which signal processing involves the use of both optical and electrical input signals. Such circuits could one day be explored in optical sensor array applications.
Bibliographical noteFunding Information:
The author is grateful to D. de Leeuw and D. Bradley for fruitful discussions and the Engineering and Sciences Research Council (EPSRC) for financial support.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)