A red to blue series of push-pull dyes for NiO based p-DSSCs.

Romain Brisse (1) , Praveen Chandrasekar (2) , Valentin Maffeis (1, 3, 4) , Tiphaine Bourgeteau (1) , Denis - Tondelier (5) , Thomas Berthelot (1) , Bernard Geffroy (1, 5) , Thomas Gustavsson (3, 4) , Jean-Manuel Raimundo (2) , Bruno Jousselme (1)

1 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
2 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille
3 LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
4 DICO - Dynamique et Interactions en phase Condensée
5 LPICM - Laboratoire de physique des interfaces et des couches minces [Palaiseau]

Finding efficient dyes for NiO photocathodes either for inverse or tandem DSSCs is essential to develop these promising low-cost solar cells. This paper reports the design, the synthesis and the physical properties characterization of four new triphenylamine-bithiophene push-pull dyes with acceptors of increasing electronic affinity, in order to shift their absorption to the red region of the visible spectrum. The dyes were tested in p-type DSSC configuration with 850 nm NiO ink-jet printed photocathodes and their performance were compared with the reference dye P1. With an iodine electrolyte, one of the dyes, possessing a 1,3-diethyl-2-thiobarbituric acceptor shows superior performance than P1, with a PCE reaching 0.124% and a JSC of 4.32 mA.cm-2.

Domains: Chemical Sciences; Material chemistry

Romain Brisse, Praveen Chandrasekar, Valentin Maffeis, Tiphaine Bourgeteau, Denis - Tondelier, et al.. A red to blue series of push-pull dyes for NiO based p-DSSCs.. Sustainable Energy & Fuels, 2018, 2, pp.648-654. ⟨10.1039/C7SE00474E⟩. ⟨cea-01672801⟩