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Issue 33, 2017
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Electron transport properties in dye-sensitized solar cells with {001} facet-dominant TiO2 nanoparticles

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Abstract

Dye-sensitized solar cells (DSSCs) with reactive {001} facet-dominant TiO2 have attracted a great deal of attention owing to their high solar cell performance, despite the origin and the variation of the results being controversial. Here, we report the characteristic charge transport properties of DSSCs composed of {001} and {101} facet-dominant TiO2 nanoparticles in order to explain the origin of solar cell performance. Based on transient photocurrent and photovoltage measurements and transient absorption spectroscopy, the energetics of TiO2 semiconductors and dye sensitizers are utilized to understand the electron diffusion, recombination, and injection kinetics to determine solar cell performance. Novel strategies to improve DSSC performance by utilizing the characteristics of {001} facet-dominant TiO2 nanoparticles are proposed, which are (1) enhancement of electron injection and (2) reduction of carrier recombination for JSC and VOC improvement, despite the drawback of slower electron diffusion in the mesoporous network of {001} facet-dominant TiO2.

Graphical abstract: Electron transport properties in dye-sensitized solar cells with {001} facet-dominant TiO2 nanoparticles

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Publication details

The article was received on 27 May 2017, accepted on 27 Jul 2017 and first published on 27 Jul 2017


Article type: Paper
DOI: 10.1039/C7CP03593D
Citation: Phys. Chem. Chem. Phys., 2017,19, 22129-22140
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    Electron transport properties in dye-sensitized solar cells with {001} facet-dominant TiO2 nanoparticles

    M. M. Maitani, K. Tanaka, Q. Shen, T. Toyoda and Y. Wada, Phys. Chem. Chem. Phys., 2017, 19, 22129
    DOI: 10.1039/C7CP03593D

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