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Issue 13, 2019
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Auxiliary donors for phenothiazine sensitizers for dye-sensitized solar cells – how important are they really?

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Abstract

Auxiliary donors are common design motifs for phenothiazine sensitizers for dye-sensitized solar cells. Despite this, there are only a few reports on their overall contribution to the photon-to-electron conversion efficiency. Twelve sensitizers have been prepared and investigated, including ten different auxiliary donors in addition to a control with no auxiliary donor. The various auxiliary donors improved the PCE by a modest 4–11%, and pyrene (AFB-19) was determined to be the most efficient auxiliary donor, with the best cell delivering a PCE of 5.36%. Included in the dye series was also the champion dye within the phenothiazine class. With a reported PCE of 12.1%, it would be an excellent phenothiazine reference dye. The high VOC of 0.83 V of this dye is worth further investigation, but the absorption and photovoltaic performance in this work does not correlate with the previously reported PCE of 12.1%.

Graphical abstract: Auxiliary donors for phenothiazine sensitizers for dye-sensitized solar cells – how important are they really?

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Supplementary files

Article information


Submitted
14 Jan 2019
Accepted
21 Feb 2019
First published
22 Feb 2019

J. Mater. Chem. A, 2019,7, 7581-7590
Article type
Paper

Auxiliary donors for phenothiazine sensitizers for dye-sensitized solar cells – how important are they really?

A. F. Buene, E. E. Ose, A. G. Zakariassen, A. Hagfeldt and B. H. Hoff, J. Mater. Chem. A, 2019, 7, 7581
DOI: 10.1039/C9TA00472F

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