染料敏化太阳电池石墨/聚苯胺复合对电极的低温制备和性能  

Low-temperature preparation and performance of graphite/PANI composite counter electrodes for DSCs

作　　者：罗玉峰[1,2] 刘茜茜[1] 徐顺建[2] 钟炜[2] 肖宗湖[2] 罗永平[2] 欧慧[2] 黄勇[3] 彭华厦[1] 

机构地区：[1]南昌大学机电工程学院,南昌330031 [2]新余学院新余新能源研究所,新余338004 [3]新余学院数学与计算机科学学院,新余338004

出　　处：《化工新型材料》2015年第3期83-85,95,共4页New Chemical Materials

基　　金：国家自然科学基金(51162025;51164033);江西省青年科学家培养对象资助计划(20133BCB23035);江西省高等学校科技落地计划项目(KJLD13100);江西省教育厅资助科研项目(GJJ13776);2014年度湖南省自然科学基金(14JJ2118);2013年湖南省教育厅科学研究项目(13C022)

摘　　要：通过低温制备(120℃)构建出不同比例石墨/聚苯胺复合对电极,分析了复合对电极组装的染料敏化太阳电池(DSCs)的光电性能,并通过X射线衍射仪、傅里叶红外光谱仪、电化学交流阻抗法和循环伏安法等表征方法探讨了光电性能变化的内在原因,同时探讨了复合对电极中引入镍纳米颗粒对DSCs光电性能的影响。结果表明:在对电极中,聚苯胺质量含量25%的复合对电极对I_3^-/I^-氧化还原反应具有更佳的催化活性,其DSCs短路电流密度、开路电压分别达到7.41mA·cm^(-2),和0.595V,其DSCs光电转换效率最大为2.193%,与纯石墨对电极和纯聚苯胺对电极时相比,光电转换效率分别提高了86.6%和45.3%。添加镍纳米颗粒后,导致复合对电极串联电阻的增加以及催化活性的弱化,最终促使相应器件的四个光电性能参数均有不同程度的下降。Various graphite/PANI composite counter electrodes on FTO conductive glass substrate were prepared with graphite and PANI by mechanical mixing at low temperature（120℃）. The photovoltaic performances for dye-sensitized solar eells（DSCs）were analyzed by X-ray diffraction , fourier infrared spectrometer, electrochemical impedance spectroscopy and cyclic voltammetry. The internal cause of the change of the photoelectric performance was discussed, at the same time discussed photovoltaic performance effect when adding nickel nanoparticles in the counter electrode. The results showed the electrode with PANI content 25% had the superior catalytic performance for I3^-/I^-redox reaction in different proportion of counter electrodes. The short circuit current density and open circuit voltage of DSCs with the electrode were 7.41mA · cm^-2and 0. 595V,and the maximum energy conversion efficiency of DSCs was 2. 193% ,which was increased by 86.6 % and 45.3 % respectively when compared with pure graphite and pure PANI counter electrode. Adding nickel nanoparticles leaded to increasing of the series resistance of the electrode,and the attenuation of the catalytic activity,and prompted the corresponding four photoelectric performance parameters of the device had a decline in various degrees.

关 键 词：染料敏化太阳电池 对电极 石墨 聚苯胺 

分 类 号：TB332[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]