TY - GEN
T1 - Composition and annealing effects in polythiophene/fullerene solar cells
AU - Kim, Y.
AU - Choulis, S. A.
AU - Nelson, J.
AU - Bradley, D. D.C.
AU - Cook, S.
AU - Durrant, J. R.
N1 - Generated from Scopus record by KAUST IRTS on 2019-11-27
PY - 2005/3/1
Y1 - 2005/3/1
N2 - We have fabricated organic solar cells with blends of regioregular poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6) C61 (PCBM) as electron donor and electron acceptor, respectively. Blend composition and device annealing effects were investigated with optical absorption and photoluminescence spectroscopy, atomic force microscopy, photocurrent spectroscopy, and current-voltage characteristic measurements on devices under monochromatic or air mass (AM) 1.5 simulated solar light illumination. The highest efficiency was achieved for the 1:1 (P3HT:PCBM) weight ratio composition. The good performance is attributed to an optimized morphology that enables close intermolecular packing of P3HT chains. Inferior performance for the 1:2 composition is attributed to poorer intermolecular packing with increased PCBM content, while phase segregation on a sub-micron scale was observed for the 1:4 composition. The power conversion efficiency (AM 1.5) was doubled by the thermal annealing of devices at 140°C to reach a value of 1.4%. © 2005 Springer Science + Business Media, Inc.
AB - We have fabricated organic solar cells with blends of regioregular poly(3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6) C61 (PCBM) as electron donor and electron acceptor, respectively. Blend composition and device annealing effects were investigated with optical absorption and photoluminescence spectroscopy, atomic force microscopy, photocurrent spectroscopy, and current-voltage characteristic measurements on devices under monochromatic or air mass (AM) 1.5 simulated solar light illumination. The highest efficiency was achieved for the 1:1 (P3HT:PCBM) weight ratio composition. The good performance is attributed to an optimized morphology that enables close intermolecular packing of P3HT chains. Inferior performance for the 1:2 composition is attributed to poorer intermolecular packing with increased PCBM content, while phase segregation on a sub-micron scale was observed for the 1:4 composition. The power conversion efficiency (AM 1.5) was doubled by the thermal annealing of devices at 140°C to reach a value of 1.4%. © 2005 Springer Science + Business Media, Inc.
UR - http://link.springer.com/10.1007/s10853-005-0568-0
UR - http://www.scopus.com/inward/record.url?scp=27144529277&partnerID=8YFLogxK
U2 - 10.1007/s10853-005-0568-0
DO - 10.1007/s10853-005-0568-0
M3 - Conference contribution
BT - Journal of Materials Science
ER -