Organic complementary-like inverters employing methanofullerene-based ambipolar field-effect transistors

Anthopoulos, Thomas D.; de Leeuw, Dago M.; Cantatore, Eugenio; Setayesh, Sepas; Meijer, Eduard J.; Tanase, Cristina; Hummelen, Jan C.; Blom, Paul W. M.
November 2004
Applied Physics Letters;11/1/2004, Vol. 85 Issue 18, p4205
Academic Journal
We demonstrate a complementary-like inverter comprised of two identical ambipolar field-effect transistors based on the solution processable methanofullerene [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The transistors are capable of operating in both the p- and n-channel regimes depending upon the bias conditions. However, in the p-channel regime transistor operation is severely contact limited. We attribute this to the presence of a large injection barrier for holes at the Au/PCBM interface. Despite this barrier the inverter operates in both the first and third quadrant of the voltage output versus voltage input plot exhibiting a maximum gain in the order of 20. Since the inverter represents the basic building block of most logic circuits we anticipate that other complementary-like circuits can be realized by this approach.


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