基于化二氧化半导体的高性能空气稳定的n通道有机薄膜晶体管
Rüdiger Schmidt1, Joon Hak Oh, Ya-Sen Sun
1Universität Würzburg, Institut für Organische Chemie, Center for Complex Material Systems, Am Hubland, Germany.
Journal of the American Chemical Society
|April 10, 2009
概括
新的二烯 (PBI) 有机半导体在有机薄膜晶体管 (OTFT) 中表现出色. 这些PBI材料表现出高电子流动性和电流调制,即使在空气中,也能实现实际应用.
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:
- 二氧化 (PBI) 染料是一种多用途的有机半导体.
- 调节分子结构影响电子特性和固态包装.
- 有机薄膜晶体管 (OTFT) 需要高性能n通道材料用于电子应用.
研究的目的:
- 合成和描述新型PBI衍生品与各种素和化伊米德替代剂.
- 研究这些替代剂对LUMO水平和固态包装的影响.
- 评估这些PBIs作为OTFT中的n通道半导体的性能.
主要方法:
- 合成14种PBI衍生物,其中含有化烯核和化胺基.
- 循环电压测量用于LUMO水平的确定.
- 单晶X射线衍射用于固态包装分析.
- 通过真空沉积制造顶部接触/下门的OTFT.
- 在和空气中的电特性.
- 牧场发生率X射线衍射 (GIXD) 和原子力显微镜 (AFM) 用于薄膜结构分析.
主要成果:
- 带有平核和多达两种替代物的PBIs表现出极好的n通道晶体管性能,特别是在OTS-S基板上和空气中 (移动性>0.5cm2/Vs,开/关>106).
- PBI衍生品1a (PTCDI-C4F7) 在和空气中实现了 > 1 cm2/Vs 的流动性和106 的开关比.
- 扭曲的,四基PBIs显示了不太有利的包装和较低的OTFT性能,只有一个四化衍生物 (2d) 的表现良好.
结论:
- PBIs的分子设计,特别是核心平面性和替代剂类型,显著影响固态包装和OTFT性能.
- 优化的PBI衍生体显示出高电子流动性和出色的空气稳定性,使它们适用于实际的n通道半导体应用.
- 该研究强调了针对先进有机电子设备量身定制的PBI结构的潜力.
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