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Issue 24, 2019
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Effect of furan π-spacer and triethylene oxide methyl ether substituents on performance of phenothiazine sensitizers in dye-sensitized solar cells

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Abstract

Conjugated π-spacers are used to improve the light harvesting properties of sensitizers for dye-sensitized solar cells. In several recent works, furan has outperformed other popular π-spacers such as thiophene and phenyl. One of the best performing phenothiazine dyes in the literature has no π-spacer, and two polar triethylene oxide methyl ether (TEOME) chains. Herein we report the synthesis and evaluation of three novel sensitizers based on EO3, investigating the effect of introducing a furan linker and stepwise removal of the TEOME chains. The furan linker redshifted the onsets in the IPCE spectra by 50 nm and improved the PCE by up to 29% compared to EO3, despite lowering the VOC by more than 60 mV. The best sensitizer of the study was AFB-30, with an average PCE of 5.86% (JSC = 10.41 mA cm−2, VOC = 783 mV, FF = 0.73) under 1 sun AM 1.5G illumination.

Graphical abstract: Effect of furan π-spacer and triethylene oxide methyl ether substituents on performance of phenothiazine sensitizers in dye-sensitized solar cells

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Supplementary files

Article information


Submitted
03 Apr 2019
Accepted
15 May 2019
First published
24 May 2019

New J. Chem., 2019,43, 9403-9410
Article type
Paper

Effect of furan π-spacer and triethylene oxide methyl ether substituents on performance of phenothiazine sensitizers in dye-sensitized solar cells

A. F. Buene, N. Boholm, A. Hagfeldt and B. H. Hoff, New J. Chem., 2019, 43, 9403
DOI: 10.1039/C9NJ01720H

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