Azadipyrromethene cyclometalation in neutral Ru-II complexes: photosensitizers with extended near-infrared absorption for solar energy conversion applications

作者:Bessette Andre; Cibian Mihaela; Ferreira Janaina G; DiMarco Brian N; Belanger Francis; Desilets Denis; Meyer Gerald J*; Hanan Garry S
来源:Dalton Transactions, 2016, 45(26): 10563-10576.
DOI:10.1039/c6dt00961a

摘要

In the on-going quest to harvest near-infrared (NIR) photons for energy conversion applications, a novel family of neutral ruthenium(II) sensitizers has been developed by cyclometalation of an azadipyrro-methene chromophore. These rare examples of neutral ruthenium complexes based on polypyridine ligands exhibit an impressive panchromaticity achieved by the cyclometalation strategy, with strong light absorption in the 600-800 nm range that tails beyond 1100 nm in the terpyridine-based adducts. Evaluation of the potential for Dye-Sensitized Solar Cells (DSSC) and Organic Photovoltaic (OPV) applications is made through rationalization of the structure-property relationship by spectroscopic, electrochemical, X-ray structural and computational modelization investigations. Spectroscopic evidence for photoinduced charge injection into the conduction band of TiO2 is also provided.

  • 出版日期2016