以甲酸處理高導電聚合物應用於非銦錫氧化物有機太陽能電池

Highly conductive PEDOT:PSS treated with formic acid for ITO-Free Polymer Solar Cell

林明毅(Ming Yi Lin) ； 朱治偉(Chih-Wei Chu)

《光學工程》 130期 (2015/07) Pp. 13-17

摘要

透明導電膜由於其透光性與導電性，在光電元件的製程上是非常重要的一部分，銦錫氧化物（ITO）薄膜在過去是最被廣泛使用之一的透明導電膜。然而銦的缺乏，導致在銦錫氧化物的製作成本上，十分的昂貴。導電聚合物（PEDOT:PSS）因為可以溶液製作，並且具有極佳的可撓性，所以被視為下一世代透明電極。然而，原始的PEDOT：PSS導電度非常低，使得它不能單獨作為電極。本研究透過添加甲酸這種便宜且無毒的化學藥劑來使PEDOT:PSS薄膜導電度增加四個數量級，且這高導電之PEDOT:PSS可單獨作為電池的陽極電極使用。以其當電極的有機高分子太陽能電池效率可高達4.1%。

關鍵字

透明導電膜 ； 甲酸 ； 導電聚合物（PEDOT:PSS） ； 有機太陽能電池（OSCs）

並列摘要

Transparent conducting films (TCFs) are optically transparent and electrically conductive in thin layers, which are an important component of a number of photovoltaic devices. Indium tin oxide (ITO) is one of the most widely used transparent conductive oxides in the past. Due to the limited abundance of indium, the price of ITO film is very high. Conductive polymer poly(3,4-ethylene dioxythiophene) (PEDOT) doped with poly(styrene sulfonate) (PSS) is quite promising for next-generation transparent electrode as it can be solution processed and is highly flexible. However, pristine PEDOT:PSS has very low conductivity so that it cannot be used as standalone electrode. This work aims at developing novel methods to significantly enhance the conductivity. A novel method using cheap and nontoxic formic acid is developed and conductivity is enhanced by four orders of magnitude and these films are used as standalone anodes for organic solar cells (OSCs). The power conversion efficiency (PCE) of the OSCs using P3HT:PCBM as the active layer can reach as high as 4.1%.

並列關鍵字

Transparent conducting films ； formic acid ； Conductive polymer poly(3,4-ethylene dioxythiophene) (PEDOT:PSS) ； organic solar cells (OSCs)