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    Top-gate hybrid complementary inverters using pentacene and amorphous InGaZnO thin-film transistors with high operational stability

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    COPE_140.pdf (919.3Kb)
    Date
    2012-03
    Author
    Kim, Jungbae
    Fuentes-Hernandez, Canek
    Hwang, D. K.
    Potscavage, William J., Jr.
    Kippelen, Bernard
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    Abstract
    We report on the operational stability of low-voltage hybrid organic-inorganic complementary inverters with a top-gate bottom source-drain geometry. The inverters are comprised of p-channel pentacene and n-channel amorphous InGaZnO thin-film transistors (TFTs) with bi-layer gate dielectrics formed from an amorphous layer of a fluoropolymer (CYTOP) and a high-k layer of Al₂O₃. The p- and n- channel TFTs show saturationmobility values of 0.1±0.01 and 5.0±0.5 cm²/Vs, respectively. The individual transistors show high electrical stability with less than 6% drain-to-source current variations after 1 h direct current (DC) bias stress. Complementary inverters yield hysteresis-free voltage transfer characteristics for forward and reverse input biases with static DC gain values larger than 45 V/V at 8 V before and after being subjected to different conditions of electrical stress. Small and reversible variations of the switching threshold voltage of the inverters during these stress tests are compatible with the observed stability of the individual TFTs.
    URI
    http://hdl.handle.net/1853/45458
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