Band-like transporting and thermally durable V-shaped organic semiconductors with a phenyl key block
Band-like transporting and thermally durable V-shaped organic semiconductors with a phenyl key block
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DOI：
10.1039/d0tc03318a
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发表时间：
2020-10-28
影响因子：
6.4
通讯作者：
Okamoto, Toshihiro
中科院分区：
文献类型：
--
作者：
Sawabe, Chizuru;Kumagai, Shohei;Okamoto, Toshihiro
为了开发具有高载流子迁移率和高耐热性的高性能小分子有机半导体，不仅需要对π电子核和取代基的分子设计进行战略性和系统性的研究，而且还需要进行基本和结构分析。在这里，我们集中在含硫的V形π电子系统与苯基取代基，并进行全面的分析，分子组装和电荷传输性能。苯基-和癸基-苯基-取代的DNT-V（Ph-DNT-VW和C10 Ph-DNT-VW）容易通过通用合成程序合成。单晶数据和理论计算表明，这两种化合物形成典型的人字形堆积结构，有利于二维电荷传输能力。实际上，Ph-DNT-VW和C10 Ph-DNT-VW的单晶晶体管具有3.1和8.1cm（2）V-1 s（-1）的优异迁移率。此外，他们的负温度系数的流动性强烈建议带状传输特性。最后，溶液处理的C10 Ph-DNT-VW薄膜晶体管具有高达180摄氏度的高耐热性，这是实用电子产品的基本特征。
Towards the development of high-performance small molecule-based organic semiconductors with high carrier mobility and high thermal durability, strategic and systematic investigations are needed for not only molecular design of pi-electron cores and substituents but also fundamental and structural analyses. Here, we focus on the sulphur-containing V-shaped pi-electron systems with phenyl substituents and carry out comprehensive analyses of molecular assembly and charge-transport properties. Phenyl- and decyl-phenyl-substituted DNT-Vs (Ph-DNT-VW and C10Ph-DNT-VW) are readily synthesized through a versatile synthetic procedure. Single crystal data and their theoretical calculations suggested that both compounds form typical herringbone-type packing structures that are favorable for two-dimensional charge-transporting capability. Indeed, single-crystal transistors of Ph-DNT-VW and C10Ph-DNT-VW have excellent mobility of 3.1 and 8.1 cm(2) V-1 s(-1). Furthermore, their negative temperature coefficients of mobility strongly suggest band-like transport characteristics. Finally, solution-processed thin-film transistors of C10Ph-DNT-VW exhibit high thermal durability up to 180 degrees C, which is an essential feature for practical electronics.