Azadipyrromethene cyclometalation in neutral Ru(II) complexes: photosensitizers with extended near-infrared absorption for solar energy conversion applications.
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 azadipyrromethene 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 photo-induced charge injection into the conduction band of TiO2 is also provided.
Département de Chimie, Université de Montréal, Pavillon J.-A. Bombardier, 5155 Decelles Avenue, Montréal, Québec H3T-2B1, Canada. garry.hanan@umontreal.ca and PCAS Canada Inc. (), 725 Trotter street, Saint-Jean-sur-Richelieu, Québec, J3B 8J8, Canada. denis.desilets@pcascanada.com.
André
A
Bessette
Département de Chimie, Université de Montréal, Pavillon J.-A. Bombardier, 5155 Decelles Avenue, Montréal, Québec H3T-2B1, Canada. garry.hanan@umontreal.ca.
Mihaela
M
Cibian
Département de Chimie, Université de Montréal, Pavillon J.-A. Bombardier, 5155 Decelles Avenue, Montréal, Québec H3T-2B1, Canada. garry.hanan@umontreal.ca.
Janaina G
JG
Ferreira
Departments of Chemistry and Materials Science & Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA. gjmeyer@email.unc.edu.
Brian N
BN
DiMarco
PCAS Canada Inc. (), 725 Trotter street, Saint-Jean-sur-Richelieu, Québec, J3B 8J8, Canada. denis.desilets@pcascanada.com.
Francis
F
Bélanger
PCAS Canada Inc. (), 725 Trotter street, Saint-Jean-sur-Richelieu, Québec, J3B 8J8, Canada. denis.desilets@pcascanada.com.
Denis
D
Désilets
Departments of Chemistry and Materials Science & Engineering, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, USA. gjmeyer@email.unc.edu.
Gerald J
GJ
Meyer
Département de Chimie, Université de Montréal, Pavillon J.-A. Bombardier, 5155 Decelles Avenue, Montréal, Québec H3T-2B1, Canada. garry.hanan@umontreal.ca.
Garry S
GS
Hanan