一碘化N-(2-羟乙基)乙二胺盐在染料敏化太阳电池中的应用

Application of N-(2-hydroxyethyl)ethylenediaminium iodide in dye-sensitized solar cells

文章利用超微铂电极,结合循环伏安法和电化学阻抗谱,研究了所制备的一碘化N-(2-羟乙基)乙二胺盐(HEEDAI)中,不同I2浓度对溶液中I3-的氧化还原行为及Pt电极/电解质溶液界面的影响;将HEE-DAI和1-甲基-3-丙基咪唑碘(MPII)分别作为I-供体,组成纯离子液体电解质组装成染料敏化太阳电池(DSSC),并比较了相应DSSC的光伏性能。结果表明,随着HEEDAI中I2浓度的增加,溶液中I3-的扩散系数逐渐减小;I2浓度为0.15 mol/L的HEEDAI所组装成的DSSC表现出较好的光伏性能;且与MPII相比较,HEEDAI所组装的DSSC具有较高的开路电压和填充因子。

Based on cyclic voltammetry（CV） and electrochemical impedance spectroscopy（EIS）,N-（2-hydroxyethyl）ethylenediaminium iodide（HEEDAI） was prepared and the influence of I2 concentration on I-3 redox behavior and Pt electrode/electrolyte interface reaction were studied by using a Pt disk ultramicroelectrode.HEEDAI and 1-methy-3-propylimidazolium iodide（MPII） were used as the source of I-in pure ionic liquid electrolytes to fabricate dye-sensitized solar cell（DSSC） respectively and their photovoltaic performance was compared.It is found that the apparent diffusion coefficient of I-3 decreases with the increase of I2 concentration.The DSSC with 0.15 mol/L I2 in HEEDAI shows better photovoltaic performance than others,and the DSSC with HEEDAI possesses higher open voltage and fill factor than that with MPII.