導電高分子由於良好的機械性質，在1980年代後逐漸成為軟性半導體主流材料，許多電子產品如有機電晶體、可撓式裝置相繼問世，為半導體產業提供另一種選擇。隨著全球化的進行，每日訊息量也以爆發式地增長，消費者對於通訊效率要求也反映在網路世代的更迭，4G、5G的相繼出現，現代人對於傳輸高速、高品質的要求不言而喻。若要同時承載如此龐大且眾多的資訊量，將會占用非常大的頻寬，對於頻域的要求也會隨之上升。為此，有機電子產品若要拓展實際應用面，必須往高頻、高速訊號的操作發展。
本研究以高分子聚(3-己烷噻吩)，(Poly(3-hexylthiophene，P3HT)作為半導體材料，以分子間作用力控制高分子薄膜有序性，並以四點量測為基礎，設計並改良為“四點量測電晶體”，建立方法學解析有機半導體在高頻訊號之表現性，同時還原載子於電晶體內之穩態與瞬態行為。

Polymer has very good mechanical properties. Because of solution coating process, low processing temperature and long-range area coating come out low cost, which is the biggest advantage compare with inorganic semiconductor. But solution process comes out chaotic aggregate, which will create contact resistance in macroscale and carrier scattering in microscale. This research will focus on the correlation between resistance and carrier scattering lifetime. Using four-probe transistor measurement can in-situ get macroscale and microscale parameters. The methodology is more reliable to bridge them together.
In steady-state measurement, two source meter units (SMU) will be used to supply and measure current and voltage. By obtaining the downward trend of the potential energy, we can know the macroscopic electronic structure performance of each part of the polymer connected in series on the channel. The potential drop must be proportional to the resistivity, which comes from the ordered or disordered alignment.
On the other hand, in transient measurement, I will use waveform generator to input pulse wave into transistor. Because carriers in the pulse will collide each other, scattering will happened and the waveform will be changed. By using gaussian distribution fitting, we can understand the diffusivity, which means scattering in microscale, and figure out the scattering lifetime.

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