Nitroxide Radicals for Highly Efficient Redox Mediation in Dye-sensitized Solar Cells

被引：53
|
作者：
Kato, Fumiaki [1 ]
Hayashi, Naoki [1 ]
Murakami, Takaya [1 ]
Okumura, Chie [1 ]
Oyaizu, Kenichi [1 ]
Nishide, Hiroyuki [1 ]
机构：
[1] Waseda Univ, Dept Appl Chem, Tokyo 1698555, Japan
来源：
CHEMISTRY LETTERS | 2010年 / 39卷 / 05期
关键词：
CONVERSION EFFICIENCY; ENERGY CONVERSION; POLYMER; BATTERY; ELECTRODE; DEVICES;
D O I：
10.1246/cl.2010.464
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A robust nitroxide radical, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and its 4-subsituted derivatives (R-TEMPO) exhibit electrochemically reversible redox properties with tunable half-wave potentials (E-1/2) based on the substituent effect. Dye-sensitized solar cells using R-TEMPO as mediators with electron-withdrawing R groups showed significantly enhanced photovoltages compared with those obtained using iodides. The linearity between the open-circuit voltage (V-oc) and E-1/2 revealed that V-oc dominated by the energy gap between the Fermi level of TiO2 and the SOMO level of R-TEMPO.
引用
收藏
页码：464 / 465
页数：2
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