Organic Semiconductor Complementary Logic Circuits

Complementary logic based circuits offers the advantages of lower power dissipation, better noise margins, more robust operation, and ease of circuit design. Organic complementary inverters have been reported. A hybrid family of complementary circuits which combined p-type organic material and n-type hydrogenated amorphous silicon (a-Si:H) have been demonstrated. It is desirable to move toward all organic circuits to take advantage of simpler processing of organic-based devices compared to a-Si:H devices. We report the characteristics of all organic complementary circuits including ring oscillators, registers, and flip-flop circuits. Both simulation and experimental results will be discussed. The five-stage ring oscillators have the delay time of 38microseconds (2.63 kHz oscillation frequency) which is close to simulation results from SPICE with organic transistor parameters.