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  4. Investigation on the Interface Modification of TiO2 Surfaces by Functional Co-Adsorbents for High-Efficiency Dye-Sensitized Solar Cells
 
research article

Investigation on the Interface Modification of TiO2 Surfaces by Functional Co-Adsorbents for High-Efficiency Dye-Sensitized Solar Cells

Chandiran, Aravind Kumar  
•
Zakeeruddin, Shaik M.  
•
Humphry-Baker, Robin  
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2017
Chemphyschem

The influence of interface modification of sensitized TiO2 surfaces by co-adsorbents on photovoltaic performance is detailed. We investigated different functional groups of co-adsorbents, such as carboxylic (4-guanidino butyric acid, chenodeoxycholic acid), phosphinic (dineohexyl phosphinic acid), and phosphonic (dodecyl phosphonic acid), to better highlight their influence on the device performance and accurately classify them into de-aggregating agents or agents with both de-aggregating and co-adsorbing properties. By optimizing the type of co-adsorbent and its concentration in the dye solution, we reached an efficiency of 11.0% using 4-guanidino butyric acid or dineohexyl phosphinic acid, compared to 10.6% when the benchmark chenodeoxycholic acid was used. The presence of co-adsorbents on the TiO2 surface was studied using ATR-FTIR spectroscopy. The role of these co-adsorbents on the band edge shift versus the recombination resistance is discussed.

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Type
research article
DOI
10.1002/cphc.201700486
Web of Science ID

WOS:000412487400017

Author(s)
Chandiran, Aravind Kumar  
•
Zakeeruddin, Shaik M.  
•
Humphry-Baker, Robin  
•
Nazeeruddin, Mohammad Khaja  
•
Graetzel, Michael  
•
Sauvage, Frederic  
Date Issued

2017

Publisher

Wiley-Blackwell

Published in
Chemphyschem
Volume

18

Issue

19

Start page

2724

End page

2731

Subjects

co-adsorbents

•

dye-sensitized solar cells

•

interfaces

•

photovoltaics

•

titanium dioxide

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPI  
GMF  
Available on Infoscience
November 8, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/141994
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