物理化学学报Issue(3)：525-532,8.DOI:10.3866/PKU.WHXB201301091
阴离子为羧酸根和芳环共轭的离子液体在染料敏化太阳能电池中的应用
Application of Ionic Liquids with Carboxyl and Aromatic Ring Conjugated Anions in Dye-Sensitized Solar Cells
摘要
Abstract
A method of utilizing p-π conjugation effects for obtaining low-viscosity ionic liquids is presented. p-π conjugation effectively disperses anionic charge and reduces Coulombic interactions. Ionic liquids prepared in this study were 1-ethyl-3-methylimidazolium benzoate (EMIB) and 1-ethyl-3-methylimidazolium isonicotinate (EMIIN). They have carboxyl and aromatic ring p-π conjugated anions, and achieve low viscosities of 42 and 27 mPa·s, respectively. EMIB and EMIIN were employed as electrolytes, which were used to construct dye-sensitized solar cel s (DSCs). After optimizing the composition, the ionic conductivity and tri odide ionic diffusion constant for the EMIB-based electrolyte were 1.43 mS·cm-1 and 1.45 × 10-7 cm2·s-1, respectively. For the EMIIN-based electrolyte, the ionic conductivity and tri odide ionic diffusion constant were 1.63 mS·cm-1 and 2.01×10-7 cm2·s-1, respectively. These were higher than the corresponding values for the EMIB-based electrolyte because of EMIINʹs lower viscosity. DSCs based on these two electrolytes attained satisfactory energy conversion efficiencies of 2.85%and 4.30%for EMIB and EMIIN, respectively, under an il umination intensity of 300 W·m-2.关键词
离子液体/粘度/电解质/电导率/染料敏化太阳能电池Key words
Ionic liquid/Viscosity/Electrolyte/Conductivity/Dye-sensitized solar cel分类
化学化工引用本文复制引用
王海,徐雪青,史继富,徐刚..阴离子为羧酸根和芳环共轭的离子液体在染料敏化太阳能电池中的应用[J].物理化学学报,2013,(3):525-532,8.基金项目
国家自然科学基金(21103194,21273241),广州市珠江科技新星专项(2012061)和中国科学院广州能源研究所所长创新基金(y007r71001)资助项目 （21103194,21273241）
