Publication date: 31st July 2014
An overview of investigation carried out in the Laboratory of Photochemistry and Energy Conversion at the Instituto de Química of the Universidade de São Paulo, IQ-USP, in particular, research and strategies to develop dye-sensitized solar cells and other molecular devices for energy conversion will be presented.
The studies are focused on kinetics, electrochemistry, spectroscopy, photochemical and photophysical properties of photoresponsive coordination compounds, such as Re(I), Ru(II) and Ir(III) polypyridyl complexes. Our interests have also been extended to supramolecular photochemistry, photosensors and nanocrystalline semiconductor sensitization.
The new materials with appropriate properties are employed in molecular devices for energy conversion, which include Dye-sensitized solar cells (DSCs), Light-emitting electrochemical cells (LECs), organic light-emitting diodes (OLEDs) and devices for artificial photosynthesis, such as Dye Sensitized Photosynthesis Cell (DESPECs). Special attention has been given to nanostructured TiO2 semiconductor films prepared by different techniques (layer-by-layer, screen printing and painting), as substrates for molecular devices. Molecularly engineered dyes or natural pigments have also been systematically studied as sensitizers for DSCs as well as the use of new materials and components for cell assemblies for development of more efficient/low cost and environmentally friendly devices.
References:
1. K.P.S. Zanoni, R. C. Amaral, N.Y. Murakami Iha, All-Nano-TiO2 Compact Film for High-Performance Dye-Sensitized Solar Cells, ACS Applied Materials and Interfaces, 2014, 10421.
2. K. Zanoni, B. K. Kariyazaki, A. Ito, M.K. Brennaman, T.J. Meyer, N.Y. Murakami Iha Blue-Green Iridium(III) Emitter and Comprehensive Photophysical Elucidation of Heteroleptic Cyclometalated Iridium(III) Complexes. Inorganic Chemistry, 2014, 53, 4089.
3. K.P.S. Zanoni, M. S. Sanematu, N.Y. Murakami Iha, Photophysical Characterization of [Ir(ppy)2(dmb)][PF6] Towards Application in Light-Emitting Electrochemical Cells (LECs), 2014, Inorganic Chemistry Communications, 2014, 43, 162.
4. L.F. Paula, R.C. Amaral, N.Y. Murakami Iha, R.M. Paniago, A.E.H. Machado, A.O.T. Patrocinio, New layer-by-layer Nb2O5-TiO2 film as an effective underlayer in dye-sensitised solar cells, RSC Adv. 2014, 4, 10310.
Acknowledgements: FAPESP, CAPES and CNPq for financial support.
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