Polaron recombination in pristine and annealed bulk heterojunction solar cells

2008/10/20 by Carsten Deibel, C. Deibel, Andreas Baumann +3 · 3 citations
Engineering · Materials Science · Physics and Astronomy · #Chalcogenide Semiconductor Thin Films #Organic Electronics and Photovoltaics #Quantum Dots Synthesis And Properties #cond-mat.mtrl-sci

paper · pdf · doi:10.1063/1.3005593

published as Appl. Phys. Lett. 93, 163303 (2008) · 4 pages, 3 figures

openalex publication_date 2008/10/20 · arxiv created 2008/10/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We determined the dominant polaron recombination loss mechanism in pristine and annealed polythiophene:fullerene blend solar cells by applying the photoinduced charge extraction by linearly increasing voltage method in dependence on temperature. In pristine samples, we find a strongly temperature-dependent bimolecular polaron recombination rate, which is reduced as compared to the Langevin theory. For the annealed sample, we observe a polaron decay rate which follows a third order of carrier concentration almost temperature independently.

Cited by

• Charge Density Dependent Nongeminate Recombination in Organic Bulk Heterojunction Solar Cells
• Origin of reduced polaron recombination in organic semiconductor devices
• Order of decay of mobile charge carriers in P3HT:PCBM solar cells

Related

• Photoinduced polarons in polymers. Time-resolved ESR analysis of polaron pairs in polymer:fullerene blends
• Kinetic Control of Recombination in Organic Photovoltaics: The Role of Spin
• Long-lived and disorder-free charge transfer states enable endothermic charge separation in efficient non-fullerene organic solar cells
• An Impedance Study of the Density of States Distribution in Blends of PM6:Y6 in Relation to Barrierless Dissociation of CT States
• Steady-state distributions of carrier concentration and recombination rates in a solar cell under operating conditions