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Photovoltaic study of quantum dot-sensitized TiO2/CdS/ZnS solar cell with P3HT or P3OT added

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Abstract

Within the body of research aimed at improving the photovoltaic performance of quantum dot-sensitized solar cells (QDSSC), poly-3-alkyl thiophenes have been commonly used in hybrid photovoltaic devices. The roles of poly(3-hexylthiophene) (P3HT) and of poly(3-octylthiophene) (P3OT) on hybrid QDSSC were investigated in the present work. To this end, CdS and ZnS QDs were deposited by successive ionic layer adsorption and reaction method on TiO2 mesoporous film. The polymers were added by drop-casting method giving the configurations TiO2/CdS/ZnS/P3HT and TiO2/CdS/ZnS/P3OT. Results showed that the polymer covers the TiO2/CdS/ZnS surface enough to protect it from contact with the polysulfide electrolyte, while electrochemical impedance spectroscopy measurements indicated that when P3HT and P3OT were employed, the recombination resistance increased and the transport resistance decreased, causing the improvement of the open circuit voltage and fill factor, respectively.

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Acknowledgments

The authors acknowledge the financial support from the CONACYT through grant of the European Community Seven Framework Program (FP7-NMP-2010-EU-MEXICO) 263878; UC-MEXUS (00007); CIO-UGTO 2013–2015 (005/2013, 004/2014, 008/2015); CeMIE-Sol 27 and 28; and the CONACYT for the PhD scholarship for A. Cerdán-Pasarán and D. Esparza, and the postdoctoral fellow of I. Zarazúa and A. Martínez-Benítez. The authors also acknowledge Christian Albor for her technical support to obtain the SEM images.

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Authors and Affiliations

  1. Centro de Investigaciones en Óptica, A.P 1-948, 37150, León, Gto, Mexico

    Andrea Cerdán-Pasarán, Diego Esparza, Isaac Zarazúa, Manuel Reséndiz, Tzarara López-Luke, Elder De la Rosa & Alejandro Martínez-Benítez

  2. División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Noria Alta s/n, 36050, Guanajuato, Gto, Mexico

    Andrea Cerdán-Pasarán, Rosalba Fuentes-Ramírez & Alejandro Alatorre-Ordaz

  3. Institute of Advanced Materials, Universitat Jaume I, 12071, Castelló, Spain

    Isaac Zarazúa

  4. Universidad Tecnológica del Estado de Querétaro (UTEQ), 76148, Santiago De Querétaro, Qro, Mexico

    Manuel Reséndiz

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  1. Andrea Cerdán-Pasarán
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Cerdán-Pasarán, A., Esparza, D., Zarazúa, I. et al. Photovoltaic study of quantum dot-sensitized TiO2/CdS/ZnS solar cell with P3HT or P3OT added. J Appl Electrochem 46, 975–985 (2016). https://doi.org/10.1007/s10800-016-0972-y

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