Quasi-solid dye-sensitized solar cells containing nanoparticles modified with ionic liquid-type molecules
Quasi-solid dye-sensitized solar cells containing nanoparticles modified with ionic liquid-type molecules
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DOI：
10.1149/1.2161578
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发表时间：
2006-01-01
影响因子：
3.9
通讯作者：
Hayase, S
中科院分区：
文献类型：
--
作者：
Kato, T;Kado, T;Hayase, S
报道了用于准固态染料敏化太阳能电池（QDSC）的凝胶电解质。凝胶电解质由离子液体和咪唑阳离子修饰的纳米粒子组成。含有纳米颗粒的离子液体型凝胶电解质是公知的。以前的报告和本报告之间的区别是，咪唑鎓阳离子通过Ti-O-CO键和长烷基链键合到纳米颗粒上。长烷基链的作用对于高性能是至关重要的。当未改性的纳米粒子加入到离子液体中，直到凝胶变成粘土状硬度，光伏性能下降，随着裸纳米粒子含量的增加。然而，当添加表面改性的纳米粒子时，光伏性能的降低被延缓。光伏性能随着连接纳米颗粒和咪唑阳离子的链长的增加而增加。当链长变为12并且抗衡阴离子为I-时，发生固化而不损失具有母体液体电解质的DSC的性能。QDSC的光电流不降低，即使当比率（纳米颗粒/离子液体）增加到0.9和功能看起来像硬粘土。纳米粒子之间的离子路径进行了讨论。(c)2006年电化学学会。
Gel electrolytes for quasi-solid dye-sensitized solar cells (QDSC) are reported. The gel electrolyte consists of ionic liquids and nanoparticles modified with imidazolium cations. Ionic liquid-type gel electrolytes containing nanoparticles are well-known. The difference between previous reports and this report is that imidazolium cations are bonded to nanoparticles through Ti-O-CO bonds and long alkyl chains. The role of the long alkyl chains turns out to be critical for high performances. When unmodified nanoparticles are added into ionic liquids until the gel becomes of clay-like hardness, the photovoltaic performances decrease with an increase in the bare nanoparticle content. However, the decreases in photovoltaic performances are retarded when surface-modified nanoparticles are added. Photovoltaic performances increase with an increase in the chain lengths connecting nanoparticles and imidazolium cations. When the chain length becomes 12 and counter anion is I-, solidification occurs without losing the performance of DSCs having the parent liquid electrolytes. The photocurrents of QDSCs do not decrease even when the ratio (nanoparticles/ionic liquids) increases to 0.9 and the feature looks like hard clay. Ionic paths between nanoparticles are discussed. (c) 2006 The Electrochemical Society.