添加剂对染料敏化太阳电池电解质性能的影响  

Influence of Additives on the Performance of Electrolytes in Dye-Sensitized Solar Cells

作　　者：史成武[1] 葛茜[1] 李兵[1] 桃李[1] 刘清安[1] 

机构地区：[1]合肥工业大学化学工程学院,合肥230009

出　　处：《物理化学学报》2008年第12期2327-2330,共4页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究发展计划项目(2006CB202600)资助

摘　　要：以N-甲基咪唑、苯并咪唑、叔丁基吡啶和离子液体1-甲基-3-乙基咪唑三氟乙酸盐(EMITA)作为染料敏化太阳电池(DSCs)电解质溶液中的添加剂,使用超微电极通过循环伏安法研究其对液体电解质中I3-和I-氧化还原行为的影响,通过电化学阻抗谱研究了上述四种添加剂对Pt电极电解质界面的影响.结果表明,添加剂EMITA的加入使I3-在电解质中的扩散系数减小,Pt电极电解质界面上的界面传输电阻Rct增大,电解质的电阻降低;光伏性能测试表明,EMITA的添加提高了DSCs的开路电压和填充因子,其DSCs的光电转换效率达到了5.72%.The influence of N-methylimidazole, benzimidazole, 4-tert-butylpyrdine and 3-ethyl-1-methyl- limidazolium trifluoroacetate （EMITA） on apparent diffusion coefficients of I3^- and I^- in the electrolyte and the Pt counter electrodelelectrolyte interface was investigated by ultramicroelectrode and electrochemical impedance spectroscopy. The apparent diffusion coefficient of I3^-; in the electrolyte decreased and charge transfer resistance at the Pt counter electrodelelectrolyte interface increased after the additives were added. The resistance of electrolytes decreased after addition of EMITA. A comparison of the photovoltaic performance of dye-sensitized solar cells （DSCs） containing the additives was undertaken. The additive EMITA increased the open voltage and the fill factor, and the efficiency of dye-sensitized solar cells was up to 5.72%.

关 键 词：添加剂 染料敏化太阳电池 Pt对电极 电化学阻抗谱超微电极 

分 类 号：TM914.4[电气工程—电力电子与电力传动]