Morphology versus Vertical Phase Segregation in Solvent Annealed Small Molecule Bulk Heterojunction Organic Solar Cells

Alexander Kovalenko; Darina Stoyanova; Jan Pospisil; Ivaylo Zhivkov; Ladislav Fekete; Daniela Karashanova; Irena Kratochvílová; Martin Vala; Martin Weiter

doi:10.1155/2015/238981

International Journal of Photoenergy (Jan 2015)

Morphology versus Vertical Phase Segregation in Solvent Annealed Small Molecule Bulk Heterojunction Organic Solar Cells

Alexander Kovalenko,
Darina Stoyanova,
Jan Pospisil,
Ivaylo Zhivkov,
Ladislav Fekete,
Daniela Karashanova,
Irena Kratochvílová,
Martin Vala,
Martin Weiter

Affiliations

Alexander Kovalenko: Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
Darina Stoyanova: Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, 109 Akademik G. Bonchev Street, P.O. Box 95, 1113 Sofia, Bulgaria
Jan Pospisil: Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
Ivaylo Zhivkov: Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
Ladislav Fekete: Institute of Physics, Academy of Sciences of the Czech Republic v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic
Daniela Karashanova: Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, 109 Akademik G. Bonchev Street, P.O. Box 95, 1113 Sofia, Bulgaria
Irena Kratochvílová: Institute of Physics, Academy of Sciences of the Czech Republic v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic
Martin Vala: Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
Martin Weiter: Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic

DOI: https://doi.org/10.1155/2015/238981
Journal volume & issue: Vol. 2015

Abstract

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The deep study of solvent annealed small molecules bulk heterojunction organic solar cells based on DPP(TBFu)2 : PC60BM blend is carried out. To reveal the reason of the solvent annealing advantage over the thermal one, capacitance-voltage measurements were applied. It was found that controlling the vertical phase segregation in the solar cells a high fullerene population in the vicinity of the cathode could be achieved. This results in increase of the shunt resistance of the cell, thus improving the light harvesting efficiency.

Published in International Journal of Photoenergy

ISSN: 1110-662X (Print); 1687-529X (Online)
Publisher: Hindawi Limited
Country of publisher: United Kingdom
LCC subjects: Technology: Mechanical engineering and machinery: Renewable energy sources
Website: https://onlinelibrary.wiley.com/journal/3837

About the journal