液晶有机半导体材料的合成及场效应晶体管研究

项目名称： 液晶有机半导体材料的合成及场效应晶体管研究

项目编号： No.51603003

项目类型： 青年科学基金项目

立项/批准年度： 2017

项目学科： 一般工业技术

项目作者： 贺耀武

作者单位： 北京大学深圳研究生院

项目金额： 15万元

中文摘要： 有机薄膜晶体管具有低生产成本和可大面积制造的优势，在柔性器件、智能卡及电子纸等领域将会有广泛的应用。因此，应用于OTFT的有机小分子半导体材料体研究引起了科研工作者的关注。然而，具有高迁移率、空气稳定性及荧光性能的有机半导体材料仍是这一领域的挑战。液晶小分子材料因具有很好的成膜性及可溶液加工等优势引起科研工作者的关注。日本科学家Iino等以液晶小分子材料作为场效应晶体管的有源层，获得了空气稳定性及热稳定性都很好且空穴迁移率超过10 cm2V-1s-1的薄膜器件。申请人在液晶小分子半导体及场效应晶体管方面也取得了一定的成果，合成了系列p型液晶小分子材料，并进行场效应晶体管研究，获得了接近10 cm2V-1s-1的薄膜迁移率。然而，高性能空气稳定的n型材料仍是这一领域的瓶颈。本项目拟以含氰基的二苯乙烯基苯为母核，合成具有n型或双极性性能的液晶小分子半导体材料，优化器件制备工艺.

中文关键词： 液晶；有机半导体材料；有机场效应晶体管

英文摘要： Organic thin film transistors (OTFTs) which have the advantages of low manufacturing costs and large area fabrication process are expected to be used as the key elements for realizing the next generation electronics, such as for exible and printed electronics. The design and synthesis of small molecule organic materials used as semiconductors in OTFT have increased signicantly in recent years because of their easily to synthesize in large quantities and have reliable device performance. Numerous eort on synthesis has been devoted to developing superior organic semiconductor materials with high charge carrier mobilities. However the design of new materials with higher mobilities, long-term device stability and high fluorescence properties for practical applications is a new challenge in this field. Recently, the liquid-crystalline materials have been considered as promising candidates for OTFTs. This is because of the liquid crystals can form well-ordered polycrystalline thin-film with large aligned domain on the base of the deposition from or the thermal annealing in LC phase. Iino and co-workers have reported a liquid crystalline material Ph-BTBT-10 with Sm E phase. This material was able to form a uniform and molecularly smooth polycrystalline thin film by using Sm E precursor thin films. The highest mobility of Ph-BTBT-10 based OTFTs was obtained up to 13.9 cm2V-1s-1. Recently, we also synthesis series novel p-type liquid crystal material for OTFT. OTFT fabricated under the crystalline Smectic G phase demonstrates the highest mobility near to 10 cm2V-1s-1. In this project, we intend to design novel n-type or bipolar liquid crystal semiconductor materials based on 1,4-bis(2-cyano-2-phenylethenyl)benzene (CN-DSB)to satisfy the technical requirements of high mobility and thermal stability for OTFT materials.

英文关键词： Liquid crystal;Organic Semiconductor Material;Organic Field-Effect Transistor