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首页> 外文学位 >Fabrication and characterization of organic single crystal and printed polymer transistors.
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Fabrication and characterization of organic single crystal and printed polymer transistors.

机译：有机单晶和印刷聚合物晶体管的制造和表征。

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摘要

The key challenges in the development of organic electronics lie in the understanding of the charge transport physics and the realization of low cost device fabrication. Innovative studies on both aspects have been demonstrated in this thesis. On the fundamental side, first, charge transport and localization processes in various organic single crystal transistors have been investigated using a novel "air-gap"device geometry. Second, comparison of mobility - carrier density relation in polymer and single crystal transistors has been made by the utilization of different liquid gate dielectrics with extremely wide capacitance range, and fundamentally different charge transport mechanisms have been proposed. Third, direct measurement of the electrochemical potential at organic semiconductor/gate dielectric interfaces in electrolyte gated transistors has been achieved with the assistance of an embedded reference electrode. The correlation between the referenced turn-on voltages and the organic semiconductor ionization potentials has been discovered. Finally, an unusual negative differential transconductance behavior in electrolyte gated transistors upon inducing high gate carrier densities has been extensively investigated.;On the application side, high performance polymer transistors and circuits were fabricated by a commercial aerosol jet printing technique. Printing not only saves the device manufacturing cost through its simple procedure, high throughput and low waste of materials, but also enables the fabrication of electronic devices over large area and on flexible substrates. All-printed transistors with exceptionally large transconductance of 10 mS/mm under 1 V of operating voltage have been realized with the application of specially designed printable high capacitance (>10 muF/cm2) ion gel as the gate dielectric material. Various device configurations and parameters have been investigated to further reduce the fabrication cost and improve the operating speed. Based on these transistors, high performance, low voltage operation logic and analog circuits such as inverters, NAND logic gates, D Flip-flop circuits and ring oscillators have been demonstrated.
机译：有机电子学发展的关键挑战在于对电荷传输物理学的理解和低成本器件制造的实现。本文对这两个方面进行了创新研究。在基本方面，首先，已经使用新颖的“气隙”器件几何结构研究了各种有机单晶晶体管中的电荷传输和定位过程。其次，通过利用具有极宽电容范围的不同液体栅电介质，比较了聚合物和单晶晶体管中迁移率-载流子密度的关系，并提出了根本不同的电荷传输机制。第三，借助于嵌入式参考电极已经实现了对电解质门控晶体管中的有机半导体/栅极电介质界面处的电化学势的直接测量。已经发现参考导通电压与有机半导体电离电势之间的相关性。最后，对引起高栅极载流子密度的电解质栅晶体管的异常负跨导行为进行了广泛研究。在应用方面，通过商业气溶胶喷射印刷技术制造了高性能聚合物晶体管和电路。印刷不仅通过其简单的过程，高产量和低材料浪费节省了设备制造成本，而且使得能够在大面积上和柔性基板上制造电子设备。通过使用专门设计的可印刷高电容（> 10μF/ cm2）离子凝胶作为栅极介电材料，已经实现了在1 V工作电压下具有10 mS / mm的超大跨导的全印刷晶体管。已经研究了各种器件配置和参数以进一步降低制造成本并提高操作速度。基于这些晶体管，已经展示了高性能，低压操作逻辑和模拟电路，例如反相器，NAND逻辑门，D触发器电路和环形振荡器。

著录项

  • 作者

    Xia, Yu.;

  • 作者单位

    University of Minnesota.;

  • 授予单位 University of Minnesota.;
  • 学科 Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 226 p.
  • 总页数 226
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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