Low-voltage pentacene transistor inverters using micro-contact printed nanolayer


Kwang H. Lee, Min Suk Oh, Byoung H. Lee, Myung M. Sung and Seongil Im


Journal of Materials Chemistry

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We report on low-voltage inverters with two pentacene-based thin-film transistors (TFTs), one of which has been fabricated on a dielectric surface selected by micro-contact printing (μCP). When a self-assembled monolayer (SAM) of 7-octenyltrichlorosilane (7-OTS) was printed on AlOx dielectric oxide, the TFT with the μCP-SAM displayed a large threshold voltage (Vth) shift (3 V shift under −5 V operation), increased device current, and clearly changed pentacene surface morphology as compared to those of the other TFT without μCP-SAM. Those results are attributed to the 7-OTS-modified pentacene/AlOx interface. Our inverter, composed of two TFTs with and without μCP-SAM, shows a high gain of [similar]50 at a supply voltage (VDD) of −20 V.

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Date added: 2012-08-22 13:48:33 | Last time updated: 2012-08-22 11:48:33 | Viewed: 867 times

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