Effect of Extended π-Conjugation of the Donor Structure of Organic D-A-π-A Dyes on the Photovoltaic Performance of Dye-Sensitized Solar Cells

被引：74
作者：
Katono, Masataka [1 ]
Wielopolski, Mateusz [2 ]
Marszalek, Magdalena [1 ]
Bessho, Takeru [1 ]
Moser, Jacques-E. [2 ]
Humphry-Baker, Robin [1 ]
Zakeeruddin, Shaik M. [1 ]
Graetzel, Michael [1 ]
机构：
[1] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
[2] Ecole Polytech Fed Lausanne, Photochem Dynam Grp, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 30期
基金：
瑞士国家科学基金会; 欧洲研究理事会;
关键词：
TRIARYLAMINE-BASED DYES; MOLECULAR DESIGN; CONVERSION-EFFICIENCY; COUMARIN DYES; ELECTROLYTE; ABSORPTION; ACCEPTOR; MOIETY; ENERGY;
D O I：
10.1021/jp411504p
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：
Two new D-A-pi-spacer-A organic dyes, KM-10 and KM-11, containing a benzothiadiazole unit in a pi-spacer and a cyanoacrylic acid as an acceptor have been synthesized and tested as sensitizers in dye-sensitized solar cells. Structural variations of the donor moiety, i.e., pi-extension of the diphenylamine electron-donating groups, gave rise to different photovoltaic efficiencies-7.1% for KM-10 and 8% for KM-11 despite having comparable absorption properties. A detailed investigation, including transient photocurrent and photovoltage decay measurement, transient absorption spectroscopy, and quantum chemical methods, provided important conclusions about the nature of the substitution on the photovoltaic properties of dyes.
引用
收藏
页码：16486 / 16493
页数：8
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