基于四四和五五的优秀半导体:从稳定的封闭到单片式开放
Tanguy Jousselin-Oba1, Masashi Mamada2, Jérôme Marrot1
1UMR CNRS 8180 , UVSQ, Institut Lavoisier de Versailles, Université Paris-Saclay , 45 Avenue des Etats-Unis , 78035 Versailles Cedex , France.
Journal of the American Chemical Society
|May 24, 2019
概括
新的稳定有机半导体,四四 (TT) 和五五 (PP),在有机场效应晶体管 (OFET) 中实现高电荷流动性. 这些材料具有增强的开特性,为先进的电子应用铺平了道路.
科学领域:
- 材料科学
- 有机电子
- 半导体物理
背景情况:
- 设计稳定的开有机材料对于发展分子有机半导体至关重要.
- 目前的有机场效应晶体管 (OFET) 具有有限的电荷流动性,通常约为10−3 cm2 V−1 s−1.
- 修改π拓是开发新型有机半导体特性的一个关键策略.
研究的目的:
- 合成和表征新的半融合有机材料,四四 (TT) 和五五 (PP).
- 调查TT和PP的基本状态性质,稳定性和多基特征.
- 评估TT和PP作为有机场效应晶体管 (OFET) 中的活性层的性能.
主要方法:
- 围融四四 (TT) 和五五 (PP) 的合成
- 使用稳定状态吸收,电子自旋共振,超导量子干扰装置和可变温度NMR进行表征.
- 密度函数理论 (DFT) 计算以了解电子结构.
- 在TG-BC和BG-TC配置中的薄膜OFET装置的制造和测试.
主要成果:
- TT和PP是在低频段间隙 (分别为1.79 eV和1.42 eV) 进行合成的.
- PP 呈现出单片开结构,其二基特征为 0.64,这归因于其独特的 π 拓.
- 在OFET中实现了高孔移动性:PP的1.4cm2V-1s-1和TT的0.77cm2V-1s-1 (TG-BC配置).
- 在两种材料 (BG-TC配置) 中都观察到两极两极的行为,具有显著的孔和电子流动性.
结论:
- 合成的TT和PP材料具有很高的稳定性和理想的开特性.
- 它们在OFET中的性能明显超过现有的有机半导体,特别是在孔移动性方面.
- 这些发现突显了围 π 系统在高性能有机电子产品中的潜力.
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