摘要
引入一种具有网状结构的导电聚苯胺为催化材料,以导电石墨为填充材料,并对其共混后丝网印刷在FTO导电面上,制备了聚苯胺/石墨复合对电极.主要解决对电极催化活性和导电特性不能有效兼顾,制作工艺复杂的问题.扫描电镜(SEM)结果表示,通过二者简单的共混后,导电聚苯胺的网状结构依然存在,石墨的加入有效填充了聚苯胺之间的空隙,在不影响原来催化活性的基础上增强了对电极的导电性.利用循环伏安(CV)和电化学阻抗(EIS)对复合对电极的催化和导电特性进行研究.对该复合对电极组装成的DSSCs进行光电性能测试,结果表明,当石墨的质量分数达到10%时,基于聚苯胺/石墨复合对电极组装成DSSCs的光电转换效率达到了8.5%,为同等条件下传统Pt电极的123%.
The aim of this study is to balance the conductive properties with catalytic activity of the counter electrodes effectively and to resolve the complexity of production process. Using a kind of network conductive polyaniline as the catalyst and graphite filler as the conductive material, by means of screen printing the mixture of the two components on the FTO surface the polyaniline/graphite composite counter electrodes were fabricated successfully. The structure and catalytic and conductive characteristics of the electrodes were investigated with the scanning electron microscopy （SEM）, cyclic vohammetry （CV） and electrochemical impedance spectroscopy （EIS）. According to the SEM results,the network structure of conducting polyaniline still exists in the composite. The addition of graphite fills the space of the polyaniline matrix effectively. Based on the same original catalytic activity, the electrical conductivity of the counter electrode has been enhanced. With the aid of CV and EIS, the catalytic and conductive characteristics of the composite counter electrode were speculated. Tests on the photoelectric performance of the DSSCs with the composite counter electrodes show that when the graphite mass fraction reaches 10% , the dye-sensitized solar cell （DSSC） based on the polyaniline/graphite composite counter electrode may have the photoelectric conversion efficiency of 8.5%. It is 123% of the efficiency with traditional Pt electrode under the same conditions.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2014年第6期844-850,共7页
Acta Polymerica Sinica
关键词
染料敏化太阳能电池
对电极
聚苯胺
网状多孔结构
Dye-sensitized solar cells, Counter electrode, Polyaniline, Mesh porous structure
