材料科学
咔唑
堆积
电子迁移率
有机半导体
Crystal(编程语言)
晶体管
结晶学
单晶
富勒烯
烷基
光电子学
光化学
有机化学
化学
量子力学
物理
电压
程序设计语言
计算机科学
作者
Ning Zhang,Wenhao Li,Jiangyu Zhu,Teng Wang,Rong Zhang,Kai Chi,Yunqi Liu,Yan Zhao,Xuefeng Lu
标识
DOI:10.1002/adma.202300094
摘要
Designing (hetero)cycloarenes through the modifications of the π-topology and molecular packing of organic semiconductors has recently garnered considerable attention. However, their applications as an organic active layer in field-effect transistors are very limited, and the obtained hole carrier mobilities are less than 1 cm2 V-1 s-1 . In this work, a novel alkyl-substituted coplanar N-heterocycloarene (FM-C4) containing four carbazole units is successfully synthesized in crystalline form. As compared to the corresponding single-bond-linked carbazole-based macrocycle M-C4, it is found that the periphery fusion strategy greatly changes the electronic structures, energy levels, photophysical properties, host-guest interactions with fullerenes, and molecular crystal stacking motifs. In particular, the fully fused N-heterocycloarene FM-C4 exhibits a herringbone packing structure with an unusual long-range π-π overlap distance as low as 3.19 Å, whereas the single crystal of M-C4 demonstrates no π-π interactions. As a consequence, FM-C4 in single-crystal transistors displays the highest hole mobility of 2.06 cm2 V-1 s-1 , significantly outperforming M-C4 and all the reported (hetero)cycloarenes and suggesting the high potential of (hetero)cycloarenes for organic electronic applications.
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