两极二烯复合半导体:基于链长度的单向二维电子结构
Masatoshi Ito1, Tomoko Fujino1, Lei Zhang1
1The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.
Journal of the American Chemical Society
|December 13, 2022
概括
研究人员使用平面二乙烯复合体开发了稳定于空气的单元双极有机半导体. 这些材料具有极好的电荷载体移动性和稳定性,为先进的电子设备铺平了道路.
科学领域:
- 材料科学
- 有机电子
- 半导体物理
背景情况:
- 空气稳定的单元双极有机半导体对于先进的电子产品至关重要,但很少实现.
- 由于适当的电子特性 (浅层HOMO,深层LUMO),二甲复合物具有空气稳定性和减少载体注射障碍的潜力.
- 现有的双极二乙烯半导体通常具有扭曲的结构,阻碍电荷传输所需的分子间相互作用.
研究的目的:
- 合成和表征新的平面二氧化替代乙烯类似物作为稳定在空气中的单元双极有机半导体.
- 研究酒精替代剂对分子包装和分子间相互作用的影响.
- 评估这些材料在场效应晶体管中的性能,重点是电荷载体的移动性,开/关比和空气稳定性.
主要方法:
- 平面醇基替代二甲复合物的合成.
- 晶体分析以确定分子包装模式 (例如,1D,类似鱼骨).
- 使用溶液处理的有机场效应晶体管 (OFET) 的制造和表征.
- 在环境空气条件下进行电性能测试.
主要成果:
- 合成的平面二甲) 类似物与不同的基替代物 (甲,乙,).
- 通过改变氧链,同时保持有效的分子间相互作用,证明了可调节的包装模式 (1D到鱼骨).
- 实现了高结晶性和可溶性材料,使可溶液处理的半导体层成为可能.
- OFET设备表现出高效的空气稳定双极特性,具有高载体流动性 (高达10~2厘米) 和开/关比 (高达10~5厘米).
结论:
- 平面氧替代二甲复合物代表了单元双极有机半导体设计的突破.
- 这些材料克服了结晶性和可溶性之间的权衡,提供了出色的可加工性和性能.
- 开发的半导体表现出一流的空气稳定双极性能,适用于有机电子的实际应用.
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