Injection and Recombination in Dye-Sensitized Solar Cells with a Broadband Absorbance Metal-Free Sensitizer Based on Oligothienylvinylene

被引：24

作者：

Caballero, Ruben ^{[1
]}

Barea, Eva M. ^{[2
]}

Fabregat-Santiago, Francisco ^{[2
]}

de la Cruz, Pilar ^{[1
]}

Marquez, Lourdes ^{[2
]}

Langa, Fernando ^{[1
]}

Bisquert, Juan ^{[2
]}

机构：

[1] Univ Castilla La Mancha, INAMOL, Toledo 45071, Spain

[2] Univ Jaume 1, Dept Fis, Castellon de La Plana 12071, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 47期

关键词：

D O I：

10.1021/jp8061515

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：

A new metal-free sensitizer for improved light harvesting with dye-sensitized solar cells (DSC) has been synthesized and fully characterized. The molecular sensitizer was engineered by linking the tiophenes groups by methine units, improving light absorption until 760 nm wavelength. In conventional DSC configuration the dye produces short-circuit current density of 13.4 mA/cm(2) at 1.5 AM illumination (100 mW cm(-2)) and the incident photon-to-current conversion efficiency (IPCE) of 58%. The causes for the limitation to the photocurrent are investigated by impedance spectroscopy measurements, and it is shown that metal-based and metal-free molecular sensitizers show distinct characteristics concerning the blocking of the TiO2 surface with coadsorbents to prevent electron recombination.

引用

页码：18623 / 18627

页数：5

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