β-不替代的五烯衍生物:薄膜结构性质和四探针场效应移动性
Mouaad-Yassine Aliouat1,2, Filadelfo Cristiano1, Lydia Abbassi2,3
1LAAS-CNRS, Université de Toulouse, UPS, 31031, Toulouse, France.
ChemPlusChem
|November 28, 2023
概括
为有机场效应晶体管 (OFET) 合成二五烯异构体显示,2,9-替代维持性能,而2,10-替代阻碍分子排序和电荷传输.
科学领域:
- 有机电子学有机电子学
- 材料科学是一种材料科学.
- 半导体物理 半导体物理
背景情况:
- 五烯是有机场效应晶体管 (OFET) 的基准有机半导体.
- 众所周知,二替代增强了像炭烯这样的多环芳的电荷载体流动性.
- 研究替代五烯对于开发先进的有机电子材料至关重要.
研究的目的:
- 为了合成2,9-和2,10-二烯丁烯异构体.
- 评估它们作为有机场效应晶体管 (OFET) 中活性元件的性能.
- 了解二替代位置对分子包装和电荷传输特性的影响.
主要方法:
- 通过直接的C-H化,化,苏子基化和脱碳化进行合成.
- 使用蒸汽沉积在SiO2基板上的薄膜制造.
- 分子包装的表征和测量OFET中的4探针孔移动性.
主要成果:
- 在薄膜生长过程中,2,9-和2,10-二烯二元体都成功合成并形成纳米丝带.
- 2,9异构体表现出类似的分子包装和0.13cm2V-1s-1的孔移动性,与未被替代的五二烯相比.
- 2,10异构体对分子排序产生了不利影响,导致0.07 cm2 V-1 s-1.1 的较低孔移动性.
结论:
- 2,9-Diphenylpentacene保留了OFET中未被替代的五烯的薄膜特性和性能.
- 2,10-Diphenylpentacene的替换显著破坏了分子的排序,导致场效应的移动性降低.
- 在diphenylanthracene中看到的移动性增强不能通过这些替代模式直接转化为pentacene.
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