喷墨打印C8-BTBT薄膜中的衬底效应及其OTFT器件

发布时间：2018-06-09 05:22

本文选题：有机薄膜晶体管(OTFT) + 喷墨打印　；参考：《微纳电子技术》2017年08期

【摘要】：以喷墨打印制备的共轭有机小分子2,7-二辛基[1]苯并噻吩并[3,2-b]苯并噻吩(C8-BTBT)作为有机薄膜晶体管(OTFT)的有源层,分别采用紫外臭氧处理、旋涂聚(4-乙烯基苯酚)(PVP)薄膜、自组装苯乙基三氯硅烷(PETS)单分子层和苯基三氯硅烷(PTS)单分子层四种衬底修饰方法,分析有机小分子薄膜生长过程中的衬底效应,及其对OTFT器件性能的影响。其中PVP或PETS修饰衬底具有疏水及低表面粗糙度的特性,在其上喷墨打印沉积的C8-BTBT单线条薄膜具有均匀性好、覆盖率高且有序堆积的结晶形貌,基于这种高质量薄膜制备的OTFT器件性能最优,饱和场效应迁移率达到1 cm2·V-1·s-1左右,开关比超过106。结果表明,对打印衬底进行疏水性处理及降低表面粗糙度是制备高性能共轭小分子OTFT器件的有效途径。
[Abstract]:The conjugated organic small molecule 2h7- dioctyl [1] benzothiopheno [3t2b] benzothiophene C8-BTBT) was used as the active layer of organic thin film transistor (OTFTs). The thin films were treated by ultraviolet ozone and spin-coated with poly (4-vinylphenol) (PVP), respectively. Self-assembled phenylethyltrichlorosilane (PETS) monolayers and phenyltrichlorosilane (PTS) monolayers were modified on four substrates to analyze the substrate effect during the growth of organic small molecular films and their effects on the properties of OTFT devices. PVP or pets modified substrates have the characteristics of hydrophobic and low surface roughness. The C8-BTBT single line films deposited by inkjet printing on them have good uniformity, high coverage and orderly stacking. Based on the high quality thin film, the OTFT device has the best performance, the saturation field effect mobility is about 1 cm2 V-1 s -1 and the switching ratio is more than 106. The results show that hydrophobic treatment of printed substrates and reduction of surface roughness are effective ways to fabricate high performance conjugated small molecule OTFT devices.
【作者单位】：合肥工业大学光电技术研究院特种显示技术教育部重点实验室;合肥工业大学光电技术研究院特种显示技术国家工程实验室;合肥工业大学光电技术研究院现代显示技术省部共建国家重点实验室;
【基金】：国家自然科学基金资助项目(51203039) 科技部973计划前研专项资助项目(2012CB723406)
【分类号】：TN321.5

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