共軛高分子聚–3–辛基塞吩摻雜碳奈米雜質之光伏電池研究

Studies of photovoltaic cell from conjugated polymer P3OT doped carbon nanosolids

蘇睦庭(Mo_Ting Su)

指導教授 ： 李偉 ； 賴再興

中原大學/理學院/應用物理研究所/碩士(2005年)

https://doi.org/10.6840/cycu200500081

摘要

摘要

本論文的實驗採取摻雜的方式以提高有機光伏電池的效能並探索其可能性。實驗使用共軛高分子聚-3-辛基塞吩（P3OT）作為光伏電池的主要材料，而採用的雜質成分來自單壁碳奈米管(SWNTs)、富樂烯碳六十(C60)以及向列型液晶E7。樣品包括五種組合，即ITO/(P3OT+SWNTs)/Al、ITO/(P3OT+C60)/Al、ITO/(P3OT+E7)/Al、ITO/(P3OT+(E7+SWNTs))/ Al、ITO/(P3OT+(E7+C60))/Al，摻雜濃度又分成1 wt%、3 wt%、5 wt%、10 wt%。實驗研究發現：摻雜奈米碳管的樣品其光電流表現並不理想，可能是碳管在材料中的分散能力不佳所致；碳六十摻雜物則如預期地能增加有機光伏電池的光電流；而摻雜液晶E7的樣品其對於光電流增益的表現最好。根據螢光光譜實驗結果推論，摻雜物E7在光導電高分子材料中的影響機制明顯與SWNTs或C60截然不同，我們推測液晶E7可以使聚合物高分子局部排列較為整齊，進而使電荷載子較易傳遞而提高了光電流值。

關鍵字

光伏電池 ； 共軛高分子

並列摘要

Abstract

In this thesis, we study the possibility of improvement of performance for organic photovoltaic cells by various dopants. The photovoltaic cell was primarily fabricated with conjugated polymer poly(3-octyl- thiophene) (P3OT), in conjunction with an additive based on singlewall carbon nanotubes (SWNTs), buckminsterfullerene (C60) or/and the nematic liquid-crystal E7. The samples include five constitutes: ITO/(P3OT+SWNTs)/Al, ITO/(P3OT+C60)/Al, ITO/(P3OT+E7)/Al, ITO/(P3OT+(E7+SWNTs))/Al and ITO/(P3OT+(E7+C60))/Al, and the doping concentration is chosen to be 1 wt%, 3 wt%, 5 wt% or 10 wt%. In view of photocurrent data, it is found that the samples doped with SWNTs perform poorly, likely due to the poor dispersion in the polymeric matrix. As anticipated, doping C60 can promote the photocurrent signal of the samples. The performance in photoconduction for the samples doped with E7 is the best among all samples investigated. From the experimental results of fluorescence spectra, we believe that the mechanism for the dopant E7 in the photoconducting polymer is different from that of carbon nanotubes or C60. We propose that the doapnt E7 may locally help polymeric molecules arrange more orderly and promote charge-carrier transport, leading to the higher photocurrent observed.

並列關鍵字

photovoltaic cell ； conjugated polymer

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