Synthesis, photovoltaic performances and TD-DFT modeling of push–pull diacetylide platinum complexes in TiO 2 based dye-sensitized solar cells
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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.
author list (cited authors)
Gauthier, S., Caro, B., Guen, F., Bhuvanesh, N., Gladysz, J. A., Wojcik, L., ... Odobel, F.