Tris-Heteroleptic Ruthenium-Dipyrrinate Chromophores in a Dye-Sensitized Solar Cell

被引：26

作者：

Li, Guocan ^{[1
]}

Hu, Ke ^{[2
]}

Robson, Kiyoshi C. D. ^{[3
,4
]}

Gorelsky, Serge I. ^{[5
]}

Meyer, Gerald J. ^{[2
]}

Berlinguette, Curtis P. ^{[3
,4
]}

Shatruk, Michael ^{[1
]}

机构：

[1] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32310 USA

[2] Johns Hopkins Univ, Dept Chem & Mat Sci & Engn, Baltimore, MD 21218 USA

[3] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada

[4] Univ Calgary, Ctr Adv Solar Mat, Calgary, AB T2N 1N4, Canada

[5] Univ Ottawa, Dept Chem, Ctr Catalysis Res & Innovat, Ottawa, ON K1N 6N5, Canada

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2015年 / 21卷 / 05期

关键词：

dyes/pigments; dye-sensitized solar cells; injection yield; N ligands; ruthenium; ENERGY-GAP LAW; COMPLEXES; LIGHT; DECAY; REGENERATION; EFFICIENCY; CONVERSION; CHEMISTRY; DYNAMICS; LIGAND;

D O I：

10.1002/chem.201405261

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two novel tris-heteroleptic Ru-dipyrrinates were prepared and tested as sensitizers in the dye-sensitized solar cell (DSSC). Under AM 1.5 sunlight, DSSCs employing these dyes achieved power conversion efficiencies (PCEs) of 3.4 and 2.2 %, substantially exceeding the value achieved previously with a bis-heteroleptic dye (0.75 %). As shown by electrochemical measurements and DFT calculations, the improved PCEs stem from the synthetically tuned electronic structure, which affords more negative excited state redox potentials and favorable electron injection into the TiO2 conduction band. Electron injection was quantified by nanosecond transient absorption spectroscopy, which revealed that the highest injection yield is achieved with the dye that acts as the strongest photoreductant.

引用

页码：2173 / 2181

页数：9

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