Ultrafast excited state dynamics of iridium(III) complexes and their changes upon immobilisation onto titanium dioxide layers.

Abstract

Time-resolved spectroscopy was applied to investigate the excited state dynamics of two heteroleptic Ir(III) complexes with the general formula [Ir(C^N)2(N^N)](+), where C^N and N^N represent different cyclometalating and diimine ligands, respectively. The excited state relaxation is influenced by the ligand substitution as well as the light polarisation. Vibrational relaxation occurs in the sub-ps timescale and interligand charge transfer results in polarisation dependent signal dynamics with a time constant of about 30 ps. Electron injection from the iridium dye to TiO2 is analysed with respect to potential applications in solar energy conversion.

DOI: 10.1039/c6cp00343e

Cite this paper

@article{Tschierlei2016UltrafastES, title={Ultrafast excited state dynamics of iridium(III) complexes and their changes upon immobilisation onto titanium dioxide layers.}, author={Stefanie Tschierlei and Antje Neubauer and Nils Rockstroh and Michael Karnahl and Patrick Schwarzbach and Henrik Junge and Matthias Beller and Stefan Lochbrunner}, journal={Physical chemistry chemical physics : PCCP}, year={2016}, volume={18 16}, pages={10682-7} }