Issue 16, 2010
From the journal:

Journal of Materials Chemistry

Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

Hyunbong Choi,a   Jeum-Jong Kim,a   Kihyung Song,b   Jaejung Ko,*a   Md. K. Nazeeruddinc  and  Michael Grätzelc  

* Corresponding authors

a Department of Advanced Material Chemistry, Korea University, Jochiwon, Chungnam 339-700, Korea
E-mail: jko@korea.ac.kr
Fax: +82 41 867 5396
Tel: +82 41 860 1337

b Department of Chemistry, Korea National University of Education, Cheongwon, Chungbuk 363-791, Korea

c LPI, Institut des Sciences et Ingénierie Chimiques Faculté des Sciences de Base École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland

Abstract

Three unsymmetrical squaraine dyes JK-64, JK-65, and JK-64Hx, containing a bulky spirobifluorene or hexyloxyphenyl unit are designed and synthesized. These sensitizers, when anchored onto a TiO2 surface, exhibit decreased aggregation as well as enhanced unidirectional flow of electrons. Under standard global AM 1.5 solar conditions, an optimized JK-64Hx sensitized cell gave a short-circuit photocurrent density (Jsc) of 12.82 mA cm−2, an open-circuit voltage (Voc) of 0.54 V and a fill factor (ff) of 0.75, corresponding to an overall conversion efficiency (η) of 5.20%.

Graphical abstract: Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

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Article information

DOI
https://doi.org/10.1039/B926863D
Article type
Paper
Submitted
22 Dec 2009
Accepted
03 Feb 2010
First published
04 Mar 2010

J. Mater. Chem., 2010,20, 3280-3286

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Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications

H. Choi, J. Kim, K. Song, J. Ko, Md. K. Nazeeruddin and M. Grätzel, J. Mater. Chem., 2010, 20, 3280 DOI: 10.1039/B926863D

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