Celle Solari Fotosensibilizzate Comprendere il meccanismo migliorare lefficienza

Celle Solari Fotosensibilizzate: Comprendere il meccanismo, migliorare l’efficienza Filippo De Angelis Istituto CNR di Scienze e Tecnologie Molecolari (ISTM), c/o Dipartimento di Chimica, Università di Perugia, I-06123 Perugia, Italy

The problem is to gather solar light at an effective cost! Solar Emission CONDUCTION 1100 nm SILICON 1. 12 e. V Ti. O 2 VALENCE CONDUCTION SILICON Ti. O 2 300 4. 13 Wavelength (nm) Energy (e. V) 2500 0. 50 380 nm 3. 20 e. V VALENCE

Dye-sensitized solar cells: =11. 3 % Ru(II)-polypyridyl sensitizers on Ti. O 2 =iph Voc ff / Is iph rate of electron injection Voc position of the conduction band (N 3 -N 34 -) Acidic COOH groups O’Regan, B. ; Grätzel, M. Nature, 1991, 353, 737 ; M. Grätzel, Nature, 2001, 414, 338.

Dye-Sensitized Solar Cells: Flexible, colorful, transparent PVs ERG, Permasteelisa, Dyesol IT, Tozzi Renewable Energy, Targetti Sankey, Colorobbia

3 KEYNOTE SPEAKERS Michael Grätzel James Durrant Arthur J. Nozik 14 INVITED SPEAKERS 64 ORAL PRESENTATIONS 30 COUNTRIES 260 PARTICIPANTS

Absorption spectrum of N 719 in water: Exp. Theor. Intensity (arb. units) * HOMO-3 MLCT (II) MLCT (I) Energy (e. V) S. Fantacci, F. De Angelis, A. Selloni F. De Angelis, S. Fantacci, M. K. Nazeeruddin F. De Angelis, . S. Fantacci, M. Grätzel et al. HOMO LUMO J. Am. Chem. Soc. 2003, 125, 4381. Chem. Phys. Lett. 2004, 389, 204. Chem. Phys. Lett. 2005, 415, 115. J. Am. Chem. Soc. 2005, 127, 16835.

Modeling of Ti. O 2 nanoparticles: Stoichiometric anatase (Ti. O 2)38 and (Ti. O 2)82 clusters of 1 and 2 nm dimensions exposing (101) surfaces 20. 5 Å 18. 5 Å Ti 82 O 164 B 3 LYP/3 -21 g* B 3 LYP/DZVP TD-DFT gap in water 3. 20/3. 41 e. V 3. 13/3. 35 e. V Experimental gap in acqueous solutions: 3. 20 – 3. 30 e. V F. De Angelis, A. Tilocca, A. Selloni J. Am. Chem. Soc. 2004, 126, 15024

Alignment of excited state potentials: F. De Angelis, S. Fantacci, A. Selloni, Nanotechnology, 2008, 19, 424002.

Charge generation and injection mechanisms: N 3 + hν N 3* N 3+ + 1 e - hν 1 e- F. De Angelis, S. Fantacci, A. Selloni, M. Grätzel J. Am. Chem. Soc. 2007, 129, 10320.

From Design to Prototypes: The TECNO-SOLART spin-off Regione dell’Umbria Comune di Perugia

Approved Projects: MIUR PRIN 2008 ongoing IIT-SEED 2009 ongoing Dyesol 2009 ongoing ESF 2009 ongoing EU-FP 7: ENERGY-2009 -India 2010 EU-FP 7: NMP-2009 2010 Submitted Projects: PON 2010 Cariplo 2010 MATTM 2010 Solar Cells) (Tozzi Renable Energy) (Fondazione Cariplo) (Targetti Sankey/Daunia