Synthesis and Characterization of New Thermally Stable Poly(naphthodithiophene) Derivatives and Applications for High-Performance Organic Thin Film Transistors
作者:Moon Chan Hwang、Jae-Wan Jang、Tae Kyu An、Chan Eon Park、Yun-Hi Kim、Soon-Ki Kwon
DOI:10.1021/ma300540f
日期:2012.6.12
polymers, PNDT-T and PNDT-TT, with enforced coplanar structure for effective π-electron delocalization, having naphtho[2,1-b:3,4-b′]dithiophene and thiophenes as main core units, were successfully synthesized by Stille coupling reaction. The naphtho[2,1-b:3,4-b′]dithiophene unit of the polymer main chain enhances charge carrier mobility by extending π-conjugation length and rigidly enforced coplanar structure
一系列新的p型聚合物PNDT-T和PNDT-TT,具有有效的π电子离域的增强共面结构,以萘并[2,1- b:3,4- b ']二噻吩和噻吩为主要核通过Stille偶联反应成功地合成了单元。聚合物主链的萘并[2,1- b:3,4- b ']二噻吩单元通过延长π-共轭长度和刚性增强的共面结构来增强电荷载流子迁移率。PNDT-T和PNDT-TT这两种聚合物在高达250°C的温度下具有高的T g都具有很高的热稳定性402°C。根据AFM和XRD结果,发现PNDT-TT具有比PNDT-T更高的有序分子间结构,具有噻吩单元和高场效应迁移率,这是因为联噻吩单元提供了结晶度,且平面度增加且足够长烷基侧链相互交错以形成高阶的空间。这些新型的p型聚合物PNDT-T和PNDT-TT表现出0.01和0.076 cm 2 /(V s)的高载流子迁移率,开/关比分别为4×10 5和7×10 6。以上结果表明,具有向上