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Issue 41, 2016
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Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

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Abstract

We introduce a novel and comprehensive approach for the evaluation and interpretation of electrochemical impedance spectroscopy (EIS) measurements in p-type DSSCs. In detail, we correlate both the device performance and EIS figures-of-merit of a series of devices in which, the calcination temperature, film thickness, and electrolyte concentration have been systematically modified. This new approach enables the separation of the different processes across the dye/semiconductor/electrolyte interface, namely the unfavorable charge recombination and the favorable electron injection/regeneration processes. In addition, studies on non-sensitized CuO and NiO electrodes provide insights into their affinity towards a reaction with the electrolyte – CuO is far less reactive towards the polyiodide species. Overall, this work underlines the superior features of CuO with respect to NiO for p-DSSCs and demonstrates a comprehensive optimization of the CuO-based DSSCs with respect to the device architecture by the aid of EIS analysis.

Graphical abstract: Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

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Publication details

The article was received on 12 Jul 2016, accepted on 29 Sep 2016 and first published on 03 Oct 2016


Article type: Paper
DOI: 10.1039/C6NR05507A
Citation: Nanoscale, 2016,8, 17963-17975
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    Optimizing CuO p-type dye-sensitized solar cells by using a comprehensive electrochemical impedance spectroscopic study

    O. Langmar, C. R. Ganivet, G. de la Torre, T. Torres, R. D. Costa and D. M. Guldi, Nanoscale, 2016, 8, 17963
    DOI: 10.1039/C6NR05507A

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