并五苯及其衍生物在有机场效应晶体管中的应用

有机场效应晶体管（organic field—effect transistors，OFETs）是以有机半导体材料作为有源层，通过电场控制电流的电子器件．与传统的无机半导体器件相比，由于其可应用于生产大面积、柔性、低成本电子设备而备受关注，在有机存储器件、有机太阳能电池、柔性平板显示和电子纸等众多领域具有潜在而广泛的应用前景．并苯类材料因其紧密的分子堆积及优异的半导体性能被广泛研究．其中，并五苯及其衍生物在场效应晶体管中表现出良好的性质，其效果甚至可以与非晶硅相媲美，但并五苯较差的溶解性及环境稳定性阻碍了其进一步应用．科研工作者通过对分子结构进行修饰改造设计，合成了一系列并五苯的衍生物，其不仅在稳定性、电学性能和溶解性方面有很大提高，还可以将该p-型半导体材料拓展到双极性及n-型半导体材料领域．本文对并五苯及其衍生物在有机场效应晶体管中的应用进行了较为全面的综述，期望对该领域的研究起到一定的推动作用．

The application of pentacene and its derivatives in organic field-effect transistors

Organic field-effect transistors （OFETs）, employing organic semiconductor as active layer, is a kind of electronic device in which the source-drain conductivity is controlled by electrical field. In comparison with conventional inorganic transistors, OFETs have attracted extensive attention due to their potential applications in large area, flexible and low-cost optoelectronic devices, such as organic memory elements, organic solar cell, flexible flat panel displays, and electronic papers. Acenes, by virtue of their tight solid state packing and superior properties, has been widely studied as semiconducting materials in OFETs. For example, pentacene has drawn great attention because it shows outstanding mobility as a p-type semiconducting material. Although the mobility of pentacene can even rival amorphous silicon, the poor solubility in organic solvents and low environmental stability indeed blocked its way for further application. A lot of modification works on acenes has been done in order to improve the stability, enhance the electrical performance, and increase the solubility. As a result, a series of pentacene derivatives has been demonstrated. In this paper, we covered a wide range of pentacene and its derivatives with focus on their applications in OFETs. We expect that this summary will provide guidelines for further research.