Title :
Ultrafast charge separation in low band-gap polymer blend for photovoltaics
Author :
Maiuri, Margherita ; Grancini, Giulia ; Fazzi, Daniele ; Egelhaaf, Hans-J ; Brida, Daniele ; Lanzani, Guglielmo ; Cerullo, Giulio
Author_Institution :
Dipt. di Fis., Politec. di Milano, Milan, Italy
Abstract :
We observe ultrafast charge dissociation in a promising low-band-gap-polymer:fullerene blend for organic photovoltaics. An hot charge transfer state, precursor of free carriers, is formed in ~30 fs upon impulsive photoexcitation with excess energy.
Keywords :
charge transfer states; fullerenes; high-speed optical techniques; narrow band gap semiconductors; photoexcitation; photovoltaic effects; polymer blends; excess energy; free carriers; hot charge transfer state; impulsive photoexcitation; low-band-gap-polymer:fullerene blend; organic photovoltaics; ultrafast charge dissociation; Charge transfer; Chemicals; Photovoltaic systems; Polymers; Probes; Tin;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
