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  4. Effect of pi-spacers on the photovoltaic properties of D-pi-A based organic dyes
 
research article

Effect of pi-spacers on the photovoltaic properties of D-pi-A based organic dyes

Sivanadanam, Jagadeeswari
•
Ganesan, Paramaguru
•
Madhumitha, Rajakumar
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2015
Journal Of Photochemistry And Photobiology A-Chemistry

Three new triphenylamine based D-pi-pi-A (TPC, TSC and TOC) dyes with different pi-spacers have been synthesized and analysed their significance on the photophysical properties and photovoltaic applications. The synthesized dyes were characterized by NMR, mass, melting point, absorbance and electrochemical measurements. In these dyes, triphenylamine moiety was utilized as electron donor and cyanoacetic acid acts as an electron acceptor. By keeping phenyl acetonitrile as one pi-spacer and another pi-spacer is varied by benzeneifuran/thiophene group and their consequences on the photophysical, electrochemical and photovoltaic properties were analysed. Photovoltaic parameter such as short circuit current density (J(SC)) and open circuit voltage (V-OC) is found to be significantly varied by changing the pi-spacer. The maximum absorption was observed for TSC with thiophene linker which results in high J(SC) value than TPC and TOC. However, a high V-OC of TPC results in better photovoltaic performance of 3.52% among other dyes. The outcome from the photophysical and photovoltaic measurements implies that the phenyl and thiophene spacer yields higher power conversion efficiency when compared to the furan bridged dye. The observed results will provide basic information for future designing of sensitizers with different pi-spacers for photovoltaic applications. (C) 2014 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.jphotochem.2014.11.018
Web of Science ID

WOS:000348269500027

Author(s)
Sivanadanam, Jagadeeswari
Ganesan, Paramaguru
Madhumitha, Rajakumar
Nazeeruddin, Md. Khaja
Rajalingam, Renganathan
Date Issued

2015

Publisher

Elsevier Science Sa

Published in
Journal Of Photochemistry And Photobiology A-Chemistry
Volume

299

Start page

194

End page

202

Subjects

Triphenylamine

•

pi-Spacer

•

Phenylacetonitrile

•

Electrochemical properties

•

Photovoltaic

•

IPCE

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GMF  
Available on Infoscience
February 20, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/111232
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