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  4. Near-infrared absorbing unsymmetrical Zn(II) phthalocyanine for dye-sensitized solar cells
 
research article

Near-infrared absorbing unsymmetrical Zn(II) phthalocyanine for dye-sensitized solar cells

Singh, Varun Kumar
•
Salvatori, Paolo
•
Amat, Anna
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2013
Inorganica Chimica Acta

Unsymmetrical Zn phthalocyanine consisting of six S-aryl groups at alpha-positions and a carboxy anchoring group at beta-position has been designed and synthesized for dye-sensitized solar cells (DSCs) applications. The unsymmetrical phthalocyanine has been characterized by elemental, MALDI-MS, IR, H-1 NMR, UV-Vis, fluorescence (steady-state & lifetime) and electrochemical (including spectroelectrochemical) methods. The Q-band absorption maxima of the unsymmetrical phthalocyanine was red-shifted due to the presence of S-aryl groups, which destabilizes the HOMO level consistent with electrochemical and in situ spectroelectrochemical studies. The redox processes are assigned to the macrocyclic ring-based electron transfer processes, the LUMO of the unsymmetrical phthalocyanines lies above the TiO2 conduction band, and the HOMO is well below the potential of the I/I-3 redox electrolyte. The experimental results are supported by DFT/TD-DFT studies. The new unsymmetrical phthalocyanines was tested in DSCs using I/I-3 redox electrolyte system. (C) 2013 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.ica.2013.07.052
Web of Science ID

WOS:000325471600041

Author(s)
Singh, Varun Kumar
Salvatori, Paolo
Amat, Anna
Agrawal, Saurabh
De Angelis, Filippo
Nazeeruddin, Md. K.  
Krishna, Narra Vamsi
Giribabu, Lingamallu
Date Issued

2013

Publisher

Elsevier

Published in
Inorganica Chimica Acta
Volume

407

Start page

289

End page

296

Subjects

Phthalocyanine

•

Unsymmetrical phthalocyanine

•

Dye-sensitized solar cells

•

Spectroelectrochemal

•

Redox electrolyte

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
Available on Infoscience
December 9, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/97764
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