TY - JOUR
T1 - Influence of molecular weight on the performance of organic solar cells based on a fluorene derivative
AU - Muller, Chris
AU - Wang, Ergang
AU - Andersson, Lars
AU - Tvingstedt, Kristofer
AU - Zhou, Yi
AU - Andersson, Mats R.
AU - Inganas, Olle
PY - 2010/7/9
Y1 - 2010/7/9
N2 - The performance of organic photovoltaic (OPV) bulk-heterojunction blends comprising a liquid-crystalline fluorene derivative and a small-molecular fullerene is found to increase asymptotically with the degree of polymerization of the former. Similar to various thermodynamic transition temperatures as well as the light absorbance of the fluorene moiety, the photocurrent extracted from OPVdevices is found to strongly vary with increasing oligomer size up to a number average molecular weight, M n≈10 kg mol 1, but is rendered less chain-length dependent for higher M n as the fluorene derivative gradually adopts polymeric behavior.
AB - The performance of organic photovoltaic (OPV) bulk-heterojunction blends comprising a liquid-crystalline fluorene derivative and a small-molecular fullerene is found to increase asymptotically with the degree of polymerization of the former. Similar to various thermodynamic transition temperatures as well as the light absorbance of the fluorene moiety, the photocurrent extracted from OPVdevices is found to strongly vary with increasing oligomer size up to a number average molecular weight, M n≈10 kg mol 1, but is rendered less chain-length dependent for higher M n as the fluorene derivative gradually adopts polymeric behavior.
UR - http://www.scopus.com/inward/record.url?scp=77955370299&partnerID=8YFLogxK
U2 - 10.1002/adfm.201000224
DO - 10.1002/adfm.201000224
M3 - Article
SN - 1616-301X
VL - 20
SP - 2124
EP - 2131
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 13
ER -