Efficient far red sensitization of nanocrystalline TiO2 films by an unsymmetrical squaraine dye

被引：480

作者：

Yum, Jun-Ho

Walter, Pablo

Huber, Simon

Rentsch, Daniel

Geiger, Thomas

Nueesch, Frank

De Angelis, Filippo

Graetzel, Michael

Nazeeruddin, Mohammad K. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Sch Basic Sci, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

[2] Swiss Fed Labs Mat Testing & Res, Lab Funct Polymers, CH-8600 Dubendorf, Switzerland

[3] Univ Perugia, Dipartimento Chim, ISTM, CNR, I-06123 Perugia, Italy

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 34期

关键词：

D O I：

10.1021/ja0731470

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

An asymmetric squaraine sensitizer comprising an anchoring group was engineered at the molecular level and synthesized. The functionalized novel squaraine sensitizers upon anchoring onto a TiO2 film exhibit an unprecedented incident photon to current conversion efficiency of 85%. The photovoltaic data of this sensitizer using an electrolyte having composition of 0.6 M M-methyl-N-butyl imidazolium iodide, 0.05 M iodine, 0.1 M LiI, 0.05 M tert-butylpyridine in a 15/85 (v/v) mixture of valeronitrile and acetonitrile revealed a short circuit photocurrent density of 10.5 +/- 0.2 mA/cm(2), an open circuit voltage of 603 +/- 10 mV, and a fill factor of 0.71 +/- 0.02, corresponding to an overall conversion efficiency of 4.50% under standard AM 1.5 sunlight.

引用

页码：10320 / +

页数：3

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