導電高分子(Conducting Polymer),結構龐大、分子量高並且本身具有導電性的物質。導電高分子所以會導電,是靠在高分子鏈上形成可移動之電子與電洞。而導電高分子鏈上獨特之單鍵、雙鍵交替而成的共軛鍵結,使得自由電子與電洞之產生與移動成為可能,進而達到導電現象. 在共軛高分子的系統中,共軛的程度可以由聚合物π到π*的轉移能量得知,當聚合物吸收波長在較長波長時,代表π到π*的電子躍遷所需能量較小,即共軛高分子的共軛長度較長,其吸收波長便會往長波長位移(紅位移)。 P3HT是目前有機太陽能電池常用的有感光層,但在製程元件時,受到UV照射和高熱下會出現嚴重的光劣化現象,因為矽氧烷有很好的耐熱性,故加入含有矽氧烷的化合物,做出新的形式的thiophene,探討其UV劣化現象 本研究主要研究導電高分子之熱性質在thiophene上導入有一個含silane的官能基,加熱產生crosslinking,再以此單體和3-Hethylthiophene合成copolymer,在高溫下探討其耐久性,另外以FT-IR UV NMR研究其結構,最後在探討其光電物性
Polythiophene is a very important material that is used in polymer solar cell. The thermal stability is very important for solar cell during the irradiation of the sun. Therefore, a new type of polythiophene is synthesized. The copolymer manifest better stability than the unmodified P3HT. PEDOT is also utilized in OLED and solar-cell. In this study, the PEDOT is modified by silane treatment. It is also found the thermal stabilities is increased by the silane treatment. Finally, electro polymerized of conducting polymer is synthesized. The structure-properties relationships are elucidated.