Polaron Recombination in Pristine and Annealed Bulk Heterojunction Solar Cells

Abstract

The major loss mechanism of photogenerated polarons was investigated in P3HT:PCBM solar cells by the photo-CELIV technique. For pristine and annealed devices, we find that the experimental data can be explained by a bimolecular recombination rate reduced by a factor of about ten (pristine) and 25 (annealed) as compared to Langevin theory. Aided by a macroscopic device model, we discuss the implications of the lowered loss rate on the characteristics of polymer:fullerene solar cells.

arXiv comment3 pages, 4 figures

References in corpus (2)

• Influence of Charge Carrier Mobility on the Performance of Organic Solar Cells
• Polaron Recombination in Pristine and Annealed Bulk Heterojunction Solar Cells

Cited by in corpus (3)

• Charge Carrier Extraction by Linearly Increasing Voltage:Analytic framework and ambipolar transients
• Organic solar cell efficiencies under the aspect of reduced surface recombination velocities
• Full characterization of electronic transport properties in working polymer light-emitting diodes via impedance spectroscopy