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Photo-physical proprieties of new molecular materials for light-to-energy conversion

Abstract : Various photo-induced energy and energy transfer processes were investigated in solution and in the film by transient absorption and fluorescence spectroscopies for two types of solar cells. Combined with other experiments and through a global analysis, those ultrafast phenomena with their lifetimes were observed and the photo-induced scenarios were determined. The insight understanding of molecular materials could help chemists to design efficient solar cells.The first study about the influence of chemical designs on charge formation and separation involves different donor moieties and different solvents and the results were explained by Marcus-Jortner theory combined with quantum calculationThe second investigation is about Fe(II) complexes as photosensitizers for dye-sensitized solar cells. A series of homo- and heteroleptic Fe(II) complexes with carbene and terpyridine ligands have been studied in solution and in the film. The record triplet metal-to-ligand charge transfer state lifetime of Fe(II) complex is achieved in solution. The further understanding in the film is in progress.
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Li Liu. Photo-physical proprieties of new molecular materials for light-to-energy conversion. Chemical Physics [physics.chem-ph]. Université de Strasbourg, 2017. English. ⟨NNT : 2017STRAE010⟩. ⟨tel-01820647⟩

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