塔拉烯异构体:通过分子轨道分布对比的OFET极性变化
Yuji Yamaguchi1, Maki Takubo1, Keisuke Ogawa1
1Graduate School of Science and Engineering, Yamagata University , 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan.
Journal of the American Chemical Society
|August 12, 2016
概括
研究人员探索了新的有机半导体材料, 这些化合物具有可调节的晶体管特性,通过控制分子轨道分布在有机电子中提供了多功能应用.
科学领域:
- 有机电子产品
- 材料科学
- 半导体物理
背景情况:
- 分子间轨道合对于有机半导体的性能至关重要.
- 之前的研究表明,2,6':2',6" - 太祖 (TAz1) 是一种有效的n型有机场效应晶体管 (OFET) 材料.
- 控制分子轨道分布是提高半导体性能的关键.
研究的目的:
- 为OFET应用研究三种新的terazulene区域异构体 (TAz2,TAz3,TAz4).
- 了解分子结构和轨道分布如何影响晶体管特性.
- 在可调节极性的有机电子中探索简单碳化合物的潜力.
主要方法:
- 三种terazulene区域异构体 (TAz2,TAz3,TAz4) 的合成
- 使用这些异构体的有机场效应晶体管 (OFET) 的制造和表征.
- 分子轨道分布 (HOMO和LUMO) 的分析及其与电子属性的相关性.
主要成果:
- TAz2和TAz3异构体表现出双极晶体管的特性.
- TAz4异构体表现出明显的n型晶体管行为.
- 所有异构体都显示出完全移位的最低未被占用分子轨道 (LUMO).
- 最高占用分子轨道 (HOMOs) 变化:在TAz2/TAz3中移位,在TAz4中局部化.
- 轨道分布与可调节的FET极性直接相关.
结论:
- 塔拉异构体是多用途的有机半导体材料.
- 分子结构,特别是青单元的连接点,决定了轨道分布和FET特征.
- 这些发现使得有机半导体的设计具有量身定制的电子特性.
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