Ambipolar organic field-effect transistor fabricated by co-evaporation of pentacene and N,N′-ditridecylperylene-3,4,9,10-tetracarboxylic diimide

Organic field-effect transistors were fabricated where the active semiconductor layer consisted of a co-evaporated film of pentacene and a perylene derivative, N,N′-ditridecylperylene-3,4,9,10-tetracarboxylic diimide. The device characteristics were evaluated in an oxygen-free environment. The field-effect transistor showed excellent ambipolar operation with field-effect hole mobility of 0.09 cm2 V−1 s−1 and field-effect electron mobility of 9.3 × 10−3 cm2 V−1 s−1. The threshold voltage for p-channel operation was −18 V and the same for n-channel operation was 15 V. This ambipolar device could be a building block to form flexible integrated circuits with low-power consumption and ease of design.