Composition and annealing effects in polythiophene/fullerene solar cells
By Youngkyoo Kim, S. Choulis, J. Nelson, D. Bradley, S. Cook, J. Durrant. 2005
208 citations recorded by the source corpus.
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%.
Subfields: Electrical and Electronic Engineering, Organic Chemistry, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/28207c0da0b135269e4c595bce3c29e79b0fc189
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In Electrical and Electronic Engineering
In Organic Chemistry
In Polymers and Plastics
Citations in the corpus
- A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene:fullerene solar cells (2006, background): “Previous studies show that thickness and annealing conditions influence device performanc”