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

页码：464 / 465

页数：2

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