“…Organic complementary metal oxide semiconductor (CMOS) inverters are the most basic circuit element in CMOS technology and are considered to be the key building block of logic architectures which include NOR, NAND, SRAM, and ring oscillators. , In principle, structurally simple inverters can be produced utilizing ambipolar transistors. , In cases of such ambipolar OFETs, however, the validity remains controversial, since either hole or electron charge transport occurs at all gate biases, resulting in unwanted incomplete switching-off and high power consumption. In contrast, although there is a physical separation between the p- and n-type transistors, an efficient and convenient CMOS architecture would integrate two unipolar OFETs on the same substrate. − In adopting such a device configuration, there exist a few drawbacks that restrict application to commercial organic circuits: balanced carrier mobilities ; air stability ; hysteresis .…”