Steady state S2-S0 and S1-S0 absorption and emission spectra and picosecond S2 decay and S1 fluorescence rise times have been measured for the model porphyrin ZnTPPS4− in water and in aqueous iodide solutions of constant ionic strength. The dynamics of S1 quenching by iodide are well-modeled by a Stern-Volmer mechanism yielding kQ = 1.75 × 109 M−1 s−1. The S2 state is quenched on a ps time scale by a static electron-transfer mechanism at an average donor-acceptor separation of 0.38 nm. The implications of these data for dye-sensitized solar cells that employ I−/I3− as the redox medium are discussed.
Authors
- dr hab. inż. Jędrzej Szmytkowski link open in new tab ,
- Sophie M.k. Brunet,
- Umakanta Tripathy,
- Jaclyn A. O'Brien,
- Matthew F. Paige,
- Ronald P. Steer
Additional information
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2011
