Electronic-insulating coating of CaCO3 on TiO2 electrode in dye-sensitized solar cells:: Improvement of electron lifetime and efficiency

被引：237

作者：

Wang, ZS ^{[1
]}

Yanagida, M ^{[1
]}

Sayama, K ^{[1
]}

Sugihara, H ^{[1
]}

机构：

[1] AIST, Tsukuba, Ibaraki 3058565, Japan

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 12期

关键词：

D O I：

10.1021/cm0603102

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electronic-insulating coating of CaCO3 on nanocrystalline TiO2 electrode for dye-sensitized solar cells was found to increase both short-circuit photocurrent (J(sc)) and open-circuit photovoltage (V-oc) remarkably. The significant increase in Jsc is mainly attributed to the remarkably increased dye adsorption resulting from the more basic surface of CaCO3 than TiO2, while the increase in Voc originates from suppression of charge recombination owing to the surface covering of TiO2 with an insulating coating of CaCO3, revealed by intensity-modulated photovoltage spectroscopy. A 15 mu m TiO2 (23nm) nanocrystalline electrode coated with 1 wt % CaCO3, sensitized with N719, produced power conversion efficiency of 10.2%, where N719 is cis-di( thiocyanato)-bis( 2,2'- bipyridyl-4,4'-dicarboxylate) ruthenium(II), using an antireflective film on the cell surface.

引用

页码：2912 / 2916

页数：5

共 24 条

[1] Intensity dependence of the back reaction and transport of electrons in dye-sensitized nanacrystalline TiO2 solar cells [J].