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Panchromatic light harvesting and record power conversion efficiency for carboxylic/cyanoacrylic Fe(ii) NHC co-sensitized FeSSCs† † Electronic supplementary information (ESI) available: Synthetic procedures, NMR spectra, additional computational details, and electrochemical and photovoltaic data. See DOI: https://doi.org/10.1039/d2sc05971a

ABSTRACT: Fe(ii) pyridyl-NHC sensitizers bearing thienylcyanoacrylic (ThCA) anchoring groups have been designed and characterized with the aim of enhancing the metal to surface charge separation and the light harvesting window in iron-sensitized DSSCs (FeSSCs). In these new Fe(ii) dyes, the introduction of the ThCA moiety remarkably extended the spectral response and the photocurrent, in comparison with their carboxylic analogues. The co-sensitization based on a mixture of a carboxylic and a ThCA–iron complex produced a panchromatic absorption, up to 800 nm and the best photocurrent and efficiency (Jsc: 9 mA cm−2 and PCE: 2%) ever reported for an FeSSC. The co-sensitization of TiO2 by using a combination of carboxylic and thienylcyanoacrylic (ThCA)–Fe(ii) pyridyl-NHC sensitizers produced a panchromatic absorption and the best photocurrent and efficiency ever reported for an FeSSC.

SUBMITTER: Reddy-Marri A

PROVIDER: S-EPMC10132143 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature

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