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High Efficiency Solid-State Dye-Sensitized Solar Cells using Cobalt(II/III) Redox Mediator


Improvement on mass transport of the considerably large sized cobalt (II/III) complexes, particularly in high viscosity electrolyte, is crucial for solid-state dye-sensitized solar cells (SS-DSCs) to reach a reliable high efficiency toward practical applications. In this work, titania nanorod aggregates (TNA) with a great specific surface area and well-developed crystalline network were utilized as photoanode building blocks for application in cobalt (II/III) tris(2′2-bipyridine) complexes based solid-state electrolyte. An initial efficiency excess 7.1% and a long term stable efficiency of approximately 8.0% were achieved at full sun illumination by freshly assembled and aged TNA SS-DSCs, respectively. This represents dramatic enhancements of nearly 35% and 100% against the SS-DSCs prepared from two standard TiO2 nanoparticle samples – CCIC (approx. 5.9%) and Degussa P25 (approx. 4.0%), correspondingly. The TNA is characterised by a combination of mesopores within each aggregate and macro inter-aggregates voids, a high specific surface area and a great light scattering ability; such features make the aggregates superior photoanode building blocks for the application in bulky cobalt redox mediator based SS-DSCs system.

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Publication details

The article was received on 08 Mar 2017, accepted on 18 Apr 2017 and first published on 19 Apr 2017

Article type: Paper
DOI: 10.1039/C7TC00994A
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    High Efficiency Solid-State Dye-Sensitized Solar Cells using Cobalt(II/III) Redox Mediator

    X. L. Zhang, W. Huang, A. Gu, W. Xiang, F. Huang, Z. X. Guo, Y. Cheng and L. Spiccia, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC00994A

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