Berlin 2005 – wissenschaftliches Programm
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SYOO: Organic Optoelectronics and Photonics
SYOO 6: Poster
SYOO 6.17: Poster
Montag, 7. März 2005, 18:00–20:00, Poster TU A
Effects of solvent and annealing on the improved performance of solar cells based on poly(3-hexylthiophene):fullerene — •Maher Al-Ibrahim1, Steffi Sensfuss2, Gerhard Gobsch3, and Oliver Ambacher1 — 1Ilmenau Technical University, Center for Micro- and Nanotechnologies, Gustav-Kirchhoff-Str. 7, D-98693 Ilmenau, Germany — 2TITK Institute, Department of Functional Polymer Systems, Breitscheidstr.97, D-07407 Rudolstadt, Germany — 3Ilmenau Technical University, Institute of Physik, Weimarer Str. 32, D-98693 Ilmenau, Germany
Polymer solar cells based on poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) were fabricated using two different solvents. P3HT:PCBM films casted from chlorobenzene solution absorb more red light than the films casted from chloroform solution. After thermal annealing, the films casted from chloroform show higher absorption than the films casted from chlorobenzene. Solar cells made from P3HT:PCBM chlorobenzene solution show no change in the white light power conversion efficiency (2.2%) after annealing. Solar cells processed from P3HT:PCBM chloroform solution show a white light power conversion efficiency of 1.5% without thermal annealing and 3.4% after the thermal annealing.