Application of a New Cyclic Guanidinium Ionic Liquid on Dye-Sensitized Solar Cells (DSCs)

被引：53

作者：

Li, Dongmei ^{[1
]}

Wang, Meiyan ^{[2
,3
]}

Wu, Junfeng ^{[1
]}

Zhang, Quanxin ^{[1
]}

Luo, Yanhong ^{[1
]}

Yu, Zhexun ^{[1
]}

Meng, Qingbo ^{[1
]}

Wu, Zhijian ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China

[3] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

LANGMUIR | 2009年 / 25卷 / 08期

关键词：

MOLECULAR-DYNAMICS SIMULATION; GEL ELECTROLYTE PRECURSORS; TEMPERATURE MOLTEN-SALTS; CONVERSION EFFICIENCY; CHARGE-TRANSPORT; IODINE; PSEUDOPOTENTIALS; PERFORMANCE; POTENTIALS; MEMBRANES;

D O I：

10.1021/la8034209

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new cyclic guanidinium ionic liquid OGI (1,3-dimethyl-2-N ''-methyl-N ''-octylimidazoguanidinium iodide) has been used as a quasi-solid-state electrolyte for dye-sensitized solar cells (DSCs), and 6.38% conversion efficiency was achieved at AM 1.5 simulated sunlight (9.81 mW cm(-2)). Further gelation with SiO2 nanoparticles afforded the solid-state electrolyte, which presented overall conversion efficiency of 5.85%. The diffusion properties of these OGI-based electrolytes were investigated. In the meantime, the optimal structure and ion-pairing interaction in OGI have been proposed by density functional theoretical calculation (DFT) at the B3LYP/6-21G(d,p) level. In view of the experimental and theoretical calculation results, it is suggested that high asymmetry and good charge delocalization of the cyclic guanidinium cation can well restrain the recombination reaction between the injected electrons in the TiO2 conduction band and I-3(-) ions through its flexible hydrocarbon group, thus giving relatively high efficiency.

引用

页码：4808 / 4814

页数：7

共 56 条

[1] Environmentally friendly LiI/ethanol based gel electrolyte for dye-sensitized solar cells [J].