摘要
An intuitive method was designed to measure the performance of various electrolytes for quantum dot-sensitized solar cells(QDSSCs). Cyclic voltammetry(CV) measurements were used to evaluate the electrolyte performance using a standard three-electrode system composed of a working electrode, counter electrode, and reference electrode. CV measurements were carried out over the potential range of-0.7 to-0.1 V at a scan rate of 50 m V s-1 in five different polysulfide electrolytes. A higher reduction peak current in the CV curve indicated a faster rate of the redox reaction(S n2- to S2-) in the electrolyte. The QDSSCs were assembled into a sandwich structure consisting of a Cd S/Cd Se co-sensitized photoanode, a Pb Se counter electrode, and a polysulfide electrolyte. Photocurrent density vs. voltage curves were measured for the assembled cells. The resulting energy conversion efficiency measurements were consistent with the CV results. An energy conversion efficiency of 5.14% was obtained for QDSSCs using an electrolyte containing 0.05 M 1,2-dimethyl-3-propylimidazolium iodide.
本文阐述了一种直观判断量子点敏化太阳能电池电解液性能的方法.采用由工作电极、对电极和参比电极组成的标准三电极系统,扫描速度为50 m V s-1,在-0.7^-0.1 V的电压范围内对五种不同的多硫电解液进行循环伏安法测定.CV曲线中还原峰电流越高,表明氧化还原反应速率越快(S n2-to S2-).本文所采用的量子点敏化太阳能电池由Cd S/Cd Se共敏化的光阳极、Pb Se对电极以及多硫电解液为主要结构组成,测量了光电流密度和电压的曲线.能量转换效率所显示的结果与CV结果一致.添加0.05 M的1,2-二甲基-3-丙基咪唑碘盐后的量子点敏化太阳能电池转换效率为5.14%.
基金
supported by the National Natural Science Foundation of China (51278034)
