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The importance of triplet state population in electronic process of organic macrocycles

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în volumul unei conferinţe

Autori: A.Boguta, D.Wrobel, A.Wojcik, R.M.Ion

Editorial: T.Blanchowicz, 8th Workshop on Photoacoustics and Photothermics, 2003.

Rezumat:

In this contribution the spectroscopic and photoelectric properties of newly synthesized phthalocyanine dyes are presented. Phthalocyanines are substituted with long alkyl chains which increase non-radiative relaxation and triplet state population in excited states deactivation of molecules. The dyes are dissolved in DMSO and embedded in a photolectrochemical cell (PEC) constructed of metallic (Au) ans semiconducting (In2O3 or SnO2) electrodes. The semiconducting electrodes are characterized by the different energetic gap: 4.1 eV and 5.4 eV for In2O3 or SnO2, respectively. The energetic scheme of the PEC and the dye singlet and triplet levels of the investigated dyes is shown and the participation of the triplet states in the charge separation process essential in solar energy conversion is discussed.

Cuvinte cheie: Triplet state, organic macrocycles, photothermics, photoacoustics