TY - JOUR
T1 - Electron and hole contributions to the terahertz photoconductivity of a conjugated polymer: fullerene blend identified.
AU - Ponseca Jr, Carlito
AU - Nemec, Hynek
AU - Vukmirovic, Nenad
AU - Fusco, Sandra
AU - Wang, Ergang
AU - Andersson, Mats R.
AU - Chabera, Pavel
AU - Yartsev, Arkady
AU - Sundstrom, Villy
PY - 2012/9/6
Y1 - 2012/9/6
N2 - Time-resolved terahertz spectroscopy was employed for the investigation of charge-transport dynamics in benzothiadiazolo-dithiophene polyfluorene ([2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4′,7′-di-2-thienyl-2′, 1′,3′-benzothiadiazole)]) (APFO-3) polymers with various chain lengths and in its monomer form, all blended with an electron acceptor ([6,6]-phenyl-C61-butyric acid methyl ester, PCBM). Upon photoexcitation, charged polaron pairs are created, negative charges are transferred to fullerenes, while positive polarons remain on polymers/monomers. Vastly different hole mobility in polymer and monomer blends allows us to distinguish the hole and electron contributions to the carrier mobility.
AB - Time-resolved terahertz spectroscopy was employed for the investigation of charge-transport dynamics in benzothiadiazolo-dithiophene polyfluorene ([2,7-(9,9-dioctyl-fluorene)-alt-5,5-(4′,7′-di-2-thienyl-2′, 1′,3′-benzothiadiazole)]) (APFO-3) polymers with various chain lengths and in its monomer form, all blended with an electron acceptor ([6,6]-phenyl-C61-butyric acid methyl ester, PCBM). Upon photoexcitation, charged polaron pairs are created, negative charges are transferred to fullerenes, while positive polarons remain on polymers/monomers. Vastly different hole mobility in polymer and monomer blends allows us to distinguish the hole and electron contributions to the carrier mobility.
UR - http://www.scopus.com/inward/record.url?scp=84865985528&partnerID=8YFLogxK
U2 - 10.1021/jz301013u
DO - 10.1021/jz301013u
M3 - Article
VL - 3
SP - 2442
EP - 2446
JO - The Journal of Physical Chemistry Letters
JF - The Journal of Physical Chemistry Letters
SN - 1948-7185
IS - 17
ER -