Kirchhoff-Institut für Physik, Universität Heidelberg , Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
InnovationLab GmbH , Speyerer Str. 4, Heidelberg, Germany.
ACS Appl Mater Interfaces. 2016 Feb;8(7):4940-5. doi: 10.1021/acsami.5b10901. Epub 2016 Feb 15.
Multilayer solution-processed devices in organic electronics show the tendency of intermixing of subsequently deposited layers. Here, we synthesize naphthalene tetracarboxydiimide (NDI)-based n-type semiconducting polymers with thermally cleavable side chains which upon removal render the polymer insoluble. Infrared and photoelectron spectroscopy were performed to investigate the pyrolysis process. Characterization of organic field-effect transistors provides insight into charge transport. After the pyrolysis homogeneous films could be produced which are insoluble in the primary solvent. By varying curing temperature and time we show that these process parameters govern the amount of side chains in the film and influence the device performance.
在有机电子学中，多层溶液处理器件具有随后沉积的层之间混合的趋势。在这里，我们合成了基于萘四羧酸二酰亚胺（NDI）的 n 型半导体聚合物，这些聚合物具有可热裂解的侧链，去除这些侧链会使聚合物不溶。我们通过红外光谱和光电子能谱研究了热裂解过程。有机场效应晶体管的特性研究提供了对电荷输运的深入了解。热裂解后可以得到均匀的薄膜，这些薄膜在初始溶剂中不溶解。通过改变固化温度和时间，我们表明这些工艺参数控制了薄膜中侧链的数量，并影响了器件性能。
