High-Performance Printed Organic Ambipolar Complementary Inverters with Polyazine Containing Diketopyrrolopyrrole

Abstract

We report ambipolar organic field effect transistors (OFETs) and complementary inverters based on polyazine containing diketopyrrolopyrrole (PBTDAZ). PDBTAZ OFETs showed well-balanced electron and hole mobilities of 0.13 and 0.12 cm²/(V·s) at a low annealing temperature of 100^oC using bottom-contact, top-gate geometry with a CYTOP^TM gate dielectric layer. The mobilities were improved to 0.56 cm²/(V·s) by thermal annealing (150°C). The ambipolar complementary-inverter-based PDBTAZ OFETs showed ideal V_inv near half of V_DD with a high gain of 15∼20 due the well-balanced electron and hole mobilities.

Keywords:

• Organic field-effect transistors
• conjugated molecules
• ambipolar semiconductor
• complementary inverter