D-π-A Dye System Containing Cyano-Benzoic Acid as Anchoring Group for Dye-Sensitized Solar Cells

被引：44
|
作者：
Katono, Masataka [1 ]
Bessho, Takeru [1 ]
Meng, Sheng [2 ,3 ]
Humphry-Baker, Robin [1 ]
Rothenberger, Guido [1 ]
Zakeeruddin, Shaik M. [1 ]
Kaxiras, Efthimios [4 ,5 ]
Graetzel, Michael [1 ]
机构：
[1] Swiss Fed Inst Technol, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland
[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[4] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA
[5] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
来源：
LANGMUIR | 2011年 / 27卷 / 23期
基金：
瑞士国家科学基金会;
关键词：
CONVERSION-EFFICIENCY; CHARGE RECOMBINATION;
D O I：
10.1021/la203104v
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A D-pi-A dye (KM-1) incorporating cyanobenzoic acid as a new acceptor/anchoring group has been synthesized for dye-sensitized solar cells (DSCs) with a high molar extinction coefficient of 66 700 M-1 cm(-1) at 437 nm. Theoretical calculations show that the hydrogen bond between -CN and surface hydroxyl leads to the most stable configuration on the surface of TiO2. In addition, the adsorption of the dye on TiO2 follows a Brunauer-Emmett-Teller (BET) isotherm. Multilayer adsorption of KM-1 on TiO2 seems to take place particularly at higher dye concentrations. DSC device using KM-1 reached a maximum incident photon-to-current conversion efficiency (IPCE) of 84%, with a solar to electric power conversion efficiency (PCE) of 3.3% at AM1.5 G illumination (100 mW cm(-2)). This new type of anchoring group paves a way to light harvesting with strong binding to the metal oxide surface. design new dyes that combine good visible
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收藏
页码：14248 / 14252
页数：5
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