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Assessment of TiO₂ Blocking Layers for Cu^II/I-Electrolyte Dye-Sensitized Solar Cells by Electrochemical Impedance Spectroscopy

Lookup NU author(s): Hannes Michaels, Professor Marina FreitagORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2022 American Chemical Society. The TiO2 blocking layer in dye-sensitized solar cells is the most difficult component to evaluate at thicknesses below 50 nm, but it is crucial for the power conversion efficiency. Here, the electrode capacitance of TiO2 blocking layers is tested in aqueous [Fe(CN)6]3-/4- and correlated to the performance of photoanodes in devices based on a [Cu(tmby)2]2+/+ electrolyte. The effects of the blocking layer on electronic recombination in the devices are illustrated with transient photovoltage methods and electrochemical impedance analysis. We have thus demonstrated a feasible and facile method to assess TiO2 blocking layers for the fabrication of dye-sensitized solar cells.

Publication metadata

Author(s): Michaels H, Freitag M

Publication type: Article

Publication status: Published

Journal: ACS Applied Energy Materials

Year: 2022

Volume: 5

Issue: 2

Pages: 1933-1941

Print publication date: 28/02/2022

Online publication date: 11/02/2022

Acceptance date: 03/02/2022

Date deposited: 14/02/2025

ISSN (electronic): 2574-0962

Publisher: American Chemical Society

URL: https://doi.org/10.1021/acsaem.1c03433

DOI: 10.1021/acsaem.1c03433

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