Low-voltage organic complementary inverters fabricated with pentacene/SrTiO3 and C60/SrTiO3 field-effect transistorsHu Yan, Hiroki Hanagata and Hidenori OkuzakiEur. Phys. J. Appl. Phys., 61 3 (2013) 30201DOI: https://doi.org/10.1051/epjap/2013120489