在本研究中，我們利用化學氧化聚合法，透過將單體3,4-乙烯二氧噻吩（3,4-ethylenedioxythiophene, EDOT）與氧化劑磷鉬酸（phosphomolybdic acid, PMA）混合，合成聚（3,4-乙烯二氧噻吩）（poly(3,4-ethylenedioxythiophene), PEDOT）導電高分子，而由於聚合後的薄膜表面具有較多的孔洞，我們透過PMA溶液對薄膜進行表面處理，處理後的膜面更為平坦且摻雜程度提高。本研究製作出的PEDOT:PMA薄膜具有良好的透光度（80%）、高功函數（5.22 eV）以及優異的水阻抗性，而薄膜的導電度在經過PMA處理後從0.08 S cm-1提升至1.26 S cm-1，高於市售的PEDOT:PSS PH1000（導電度為0.15 S cm-1）。最後我們將PEDOT:PMA薄膜應用於有機太陽能電池，成功驗證了材料應用於電洞傳輸層的可行性。本研究製程簡易且快速、成本低廉，未來可望用於大面積生產，具有廣泛的應用。

In this study, we used chemical oxidative polymerization to synthesize poly(3,4-ethylenedioxythiophene (PEDOT) conductive polymer, by mixing the monomer 3,4-ethylenedioxythiophene (EDOT) with the oxidant phosphomolybdic acid (PMA). Because the surface of the polymerized film has lot of pin-hole, we use the PMA solution to post-treatment the thin film. The treated film surface has a flatter surface and a higher doping level. The PEDOT:PMA film fabricated by this method has good transmittance (80%), high work function (5.22 eV) and excellent water resistance, while the conductivity of the film after PMA treatment increases from 0.08 S cm-1 increased to 1.26 S cm-1, while the conductivity of the commercially available PEDOT:PSS PH1000 was 0.15 S cm-1. Finally, we applied the PEDOT:PMA thin film to organic solar cells, and successfully verified the feasibility of the material applied to the hole transport layer. The research process is simple, fast, and low-cost, and it is expected to be used in large-scale production in the future, with a wide range of applications.

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