Journal
NEW JOURNAL OF CHEMISTRY
Volume 42, Issue 11, Pages 9281-9290Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nj05188c
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Funding
- Milano-Bicocca Solar Energy Research Center - MIB-Solar, University of Milano-Bicocca [3500010866]
- Eni SpA-Roma [3500010866]
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Di-branched dyes based on a triphenylamino (TPA) donor core have been functionalized with different aromatic and heteroaromatic peripheral groups bonded to TPA as auxiliary donors and investigated as sensitizers in DSSC. The different aromatic and heteroaromatic substitution significantly perturbed the optical properties of the dyes compared to the unsubstituted TPA reference dye, in turn leading to enhanced photovoltaic performances in terms of photocurrent, photovoltage, and power conversion efficiency (PCE). The enhancement originated from improved strategic interface interactions between the dye-sensitized titania and the liquid electrolyte, as ascertained by current-voltage, quantum efficiency (IPCE), light harvesting properties (LHE), and impedance spectroscopy (EIS) studies.
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