聚苯乙烯分子刷绝缘修饰层对喷墨打印有机薄膜晶体管的影响

发布时间：2018-03-26 18:27

本文选题：喷墨打印　切入点：有机薄膜晶体管　出处：《合肥工业大学》2015年硕士论文

【摘要】：在现有的印刷技术中,喷墨打印凭借其直接图案化、无需掩膜光刻及材料利用率高等优点,从出现一开始就引起了人们的普遍关注。而在喷墨打印的有机薄膜晶体管(OTFT)中,绝缘层的界面修饰是提高喷墨打印有源层半导体分子结晶性及优化OTFT器件电学性能的有效方法。本文通过表面引发-原子转移自由基聚合(SI-ATRP)在OTFT中的绝缘层表面制备了表面光滑平整的不同厚度的聚苯乙烯(PS)分子刷修饰层,其粗糙度均在0.5 nm以下。将其与常用紫外臭氧(UV/03)、六甲基二硅胺(HMDS)、十八烷基三氯硅烷(OTDS)的修饰表面进行对比,研究了各修饰表面对喷墨打印的TIPS-并五苯单点的薄膜形貌和结晶形态的影响。结果表明,相比于其它几种修饰表面,PS分子刷表面对喷墨打印的6,13-双(三异丙基硅烷基乙炔基)并五苯(TIPS-并五苯)薄膜有很好的结晶修饰作用,且随着PS分子刷厚度的增加,TIPS-并五苯分子的结晶逐渐变得连续,在厚度为15.0 nm的PS分子刷表面,单点薄膜的结晶可以呈整片连续状。单点结晶的改善依赖于接枝PS的链长,越长的PS链使得墨滴的粘度越大,墨滴在干燥过程中就会产生越为连续均匀的结晶形貌。在不同厚度的PS分子刷表面喷墨打印单点OTFT器件中,器件电学性能也随PS分子刷厚度的增加而逐渐提高,15.0 nm厚的PS分子刷上的单点金电极器件最高迁移率可达1.14×10-2cm2V-1s-1。
[Abstract]:In the existing printing technology, inkjet printing, with its advantages of direct patterning, no mask lithography and high material utilization rate, has attracted widespread attention from the beginning. However, in the organic thin film transistor (OTFT) of inkjet printing, The interfacial modification of insulating layer is an effective method to improve the crystallization of active layer semiconductor and optimize the electrical properties of OTFT devices. In this paper, the surface of insulating layer in OTFT by surface initiation-atom transfer radical polymerization (SI-ATRP) is studied. A smooth and smooth polystyrene (PS) brush with different thickness was prepared. The roughness is below 0.5 nm. The modified surfaces of UV / 03, HMDS, Octadecyl trichlorosilane (OTDS) are compared with those of UV ozone, HMDS, octadecyl trichlorosilane (Octadecyl trichlorosilane). The effect of various modified surfaces on the morphology and crystalline morphology of TIPS- and pentabenzene films in inkjet printing was studied. Compared with other modified surfaces, the surface of PS molecular brush has a good effect on crystallization modification of ink-jet printed 6o 13- bis (triisopropyl silyl acetylacetyl) and pentaben TIPS- pentabenzene films. With the increase of the thickness of PS molecular brush, the crystallization of TIPS- and pentabenzene gradually becomes continuous. On the surface of PS molecular brush with thickness of 15.0 nm, the crystallization of single point film can be continuous. The improvement of single point crystallization depends on the chain length of grafted PS. The longer the PS chain is, the higher the viscosity of the droplet is, and the more uniform the crystalline morphology of the droplet is during the drying process. With the increase of PS molecular brush thickness, the maximum mobility of single point gold electrode devices on PS molecular brushes with 15.0 nm thickness can reach 1.14 脳 10 ~ (-2) cm ~ (-2) V-1s ~ (-1).
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN321.5

【相似文献】