Abstract In this study, we report a facile route to regulate the crystallization and enhance charge transport of small-molecule organic semiconductors by blending with a rubbery polymer additive polyisobutylene (PIB). Using a solution-processed semiconductor 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene) to mix with the PIB polymer, we show that the addition of PIB led to densely-arranged, lengthened TIPS pentacene needles with excellent long-range uniformity. Bottom-gate, top-contact organic thin-film transistors (OTFTs) based on TIPS pentacene/PIB hybrid film demonstrated a field-effect mobility of up to 0.15 cm2/Vs, and particularly, a 3-fold and 2-fold enhancement of average mobility and performance consistency (denoted by average mobility to standard deviation ratio). In addition, the effect of hexamethyldisilazane (HMDS) surfactant treatment on the semiconductor charge transport was studied. We ascribe such improved performance of TIPS pentacene/PIB blend OTFTs to the collaborative outcome of reduced crystal misorientation, diminished defects and charge trap centers, as well as a higher areal coverage. The effective method as demonstrated in this work can be generally implemented to attune the crystal growth and promote charge transport of newly-developed small-molecule organic semiconductors.

中文翻译：

---

一种用弹性体改善基于 TIPS 并五苯的有机薄膜晶体管性能的简便而新颖的途径

摘要 在这项研究中，我们报告了一种通过与橡胶状聚合物添加剂聚异丁烯 (PIB) 混合来调节小分子有机半导体的结晶和增强电荷传输的简便途径。使用溶液处理的半导体 6,13-​​双（三异丙基甲硅烷基乙炔基）并五苯（TIPS 并五苯）与 PIB 聚合物混合，我们表明 PIB 的添加导致具有优异远程均匀性的密集排列、加长的 TIPS 并五苯针。基于 TIPS 并五苯/PIB 混合膜的底栅、顶部接触有机薄膜晶体管 (OTFT) 表现出高达 0.15 cm2/Vs 的场效应迁移率，尤其是其 3 倍和 2 倍增强平均流动性和性能一致性（用平均流动性与标准偏差的比率表示）。此外，研究了六甲基二硅氮烷 (HMDS) 表面活性剂处理对半导体电荷传输的影响。我们将 TIPS 并五苯/PIB 混合 OTFT 的这种改进性能归因于减少晶体取向错误、减少缺陷和电荷陷阱中心以及更高的区域覆盖率的协同结果。这项工作中证明的有效方法通常可以用于调整晶体生长并促进新开发的小分子有机半导体的电荷传输。