Very-Low-Temperature Integrated Complementary Graphene-Barristor-Based Inverter for Thin-Film Transistor Applications

Abstract

Complementary graphene-barristor-based inverters using n-type ZnO:N and p-type dinaphtho-[2,3-b:2,3-f]thieno[3,2-b]thiophene semiconductor layers are fabricated at a maximum process temperature lower than 200 degrees C. The devices display on/off ratios greater than 10(4). The transmittance of the device stack is higher than 80% at wavelengths larger than 470 nm. The complementary graphene-barristor inverter exhibits a high gain (>8 at V-DD = 2 V) by using a back-gate structure, which allows for aggressive gate-dielectric scaling. The potential performance of the inverter, as projected using experimental device parameters, shows that a very high voltage gain of over 70 and a low switching power consumption of below 10 nW can be achieved at V-DD = 2 V and an equivalent oxide thickness of 1 nm. These performances are very promising for thin-film transistor applications.