Panchromatic light harvesting and record power conversion efficiency for carboxylic/cyanoacrylic Fe(ii) NHC co-sensitized FeSSCs†
Anil
Reddy-Marri, 
a
Edoardo
Marchini,
b
Valentin Diez
Cabanes,
c
Mariachiara
Pastore,
*c
Stefano
Caramori
*b
and
Philippe C.
Gros
*e
a
Edoardo
Marchini,
b
Valentin Diez
Cabanes,
c
Mariachiara
Pastore,
*c
Stefano
Caramori
*b
and
Philippe C.
Gros
*e
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.
- This article is part of the themed collection: 2023 Chemical Science HOT Article Collection
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