Organic TFTs

Abstract

A large number of organic TFT materials now display carrier mobility values approaching, or exceeding, those of a-Si:H, and this has stimulated considerable interest in using them for low cost, flexible substrate applications, such as RFID tags, and e-reader displays. This chapter reviews work in this field, and starts by introducing some of the key organic chemistry concepts, which underpin the semiconducting behaviour of these materials. Other topics include molecular ordering, carrier transport, TFT architecture, and the deposition of both semiconductor and dielectric materials, together with their properties. These are linked to device behaviour, with a focus on the key material and design issues, which currently limit TFT performance, such as metal/organic contacts, and ambient and bias stability effects.