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This article is part of the Research Topic

Photoactive Interfaces for Solar Energy Conversion

Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Chem. | doi: 10.3389/fchem.2019.00099

Sodium Hydroxide pretreatment as an effective approach to reduce the dye/holes recombination reaction in p-type DSCs

  • 1Sapienza University of Rome, Italy
  • 2University of Turin, Italy

We report the synthesis of a novel squaraine dye (VG21-C12) and investigate its behavior as p-type sensitizer for p-type Dye-Sensitized Solar Cells. The results are compared with O4-C12, a well-known sensitizer for p-DSC, and a sodium hydroxide pretreatment is described as an effective approach to reduce the dye/holes recombination. Various variable investigation such as dipping time, dye loading, photocurrent and resulting cell efficiency are also reported. Electrochemical impedance spectroscopy (EIS) was utilized for investigating charge transport properties of the different photoelectrodes and the recombination phenomena that occur at the (un)modified electrode/electrolyte interface.

Keywords: squaraines, p-type DSSCs, NIR absorbing dye, NaOH pretreatment, Recombination reaction

Received: 17 Dec 2018; Accepted: 05 Feb 2019.

Edited by:

Stefano Caramori, University of Ferrara, Italy

Reviewed by:

Adriano Sacco, Istituto Italiano di Tecnologia, Italy
Francesca Tessore, University of Milan, Italy  

Copyright: © 2019 Bonomo, Barbero, Naponiello, Giordano, Dini and Barolo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Claudia Barolo, University of Turin, Turin, 10124, Piedmont, Italy,