Synthesis, photovoltaic performances and TD-DFT modeling of push-pull diacetylide platinum complexes in TiO2 based dye-sensitized solar cells.
In this joint experimental-theoretical work, we present the synthesis and optical and electrochemical characterization of five new bis-acetylide platinum complex dyes end capped with diphenylpyranylidene moieties, as well as their performances in dye-sensitized solar cells (DSCs). Theoretical calculations relying on Time-Dependent Density Functional Theory (TD-DFT) and a range-separated hybrid show a very good match with experimental data and allow us to quantify the charge-transfer character of each compound. The photoconversion efficiency obtained reaches 4.7% for 8e (see TOC Graphic) with the tri-thiophene segment, which is among the highest efficiencies reported for platinum complexes in DSCs.
Institut des Sciences Chimiques de Rennes, UMR CNRS 6226, IUT de Lannion, rue Edouard Branly, BP 30219, F22302 Lannion Cedex, France. sebastien.gauthier@univ-rennes1.fr.
Sébastien
S
Gauthier
Bertrand
B
Caro
Françoise
F
Robin-Le Guen
Nattamai
N
Bhuvanesh
John A
JA
Gladysz
Laurianne
L
Wojcik
Nicolas
N
Le Poul
Aurélien
A
Planchat
Yann
Y
Pellegrin
Errol
E
Blart
Denis
D
Jacquemin
Fabrice
F
Odobel