Publication detail

Towards improved efficiency of bulk-heterojunction solar cells using various spinel ferrite magnetic nanoparticles

Alexander Kovalenko , Raghvendra Singh Yadav, Jan Pospisil, Oldrich Zmeskal, Daniela Karashanova, Patricie Heinrichová, Martin Vala, Jaromir Havlica, Martin Weiter

Original Title

Towards improved efficiency of bulk-heterojunction solar cells using various spinel ferrite magnetic nanoparticles

Type

journal article in Web of Science

Language

English

Original Abstract

A detailed study of organic solar cells (OSC) doped with various ferromagnetic and superparamagnetic (Fe3O4, ZnFe2O4 NiFe2O4) nanoparticles (MNPs) is presented. Additionally to previously used magnetite nanoparticles, various magnetic moment spinel ferrites were applied. By impedance spectroscopy (IS) analysis it is shown how the doping with various MNPs influences solar cells' performance by the charge carrier effective lifetime extension. In this regard, we introduced a convenient illustrative method to define time constants from the impedance measurements. It is also shown that, photovoltaic performance of the solar cells directly depends on the magnetic moment and alignment of the. super paramagnetic single-domain MNPs. Alignment of the MNPs within the OSCs' active layer results in MNPs dipole-dipole interaction, thus further-improves photovoltaic performance due to efficient charge collection at the short-circuit condition. OSC doping with ferromagnetic MNPs showed negative influence on the device petformance, however in dark conditions, devices doped with CoFe2O4 showed higher forward current presumably due to leakage current through the large MNP aggregation or electron-polaron hopping. (C) 2016 Elsevier B.V. All rights reserved.

Keywords

Organic solar cells; Magnetic nanoparticles; External magnetostatic field; Spinel ferrite; Impedance spectroscopy

Authors

Alexander Kovalenko , Raghvendra Singh Yadav, Jan Pospisil, Oldrich Zmeskal, Daniela Karashanova, Patricie Heinrichová, Martin Vala, Jaromir Havlica, Martin Weiter

Released

1. 12. 2016

Publisher

Elsevier

ISBN

1566-1199

Periodical

ORGANIC ELECTRONICS

Year of study

39

Number

1

State

Kingdom of the Netherlands

Pages from

118

Pages to

126

Pages count

9

URL

http://www.sciencedirect.com/science/article/pii/S1566119916304256

BibTex

@article{BUT128927,
  author="Alexander {Kovalenko} and Jan {Pospíšil} and Oldřich {Zmeškal} and Patricie {Heinrichová} and Martin {Vala} and Jaromír {Havlica} and Martin {Weiter}",
  title="Towards improved efficiency of bulk-heterojunction solar cells using various spinel ferrite magnetic nanoparticles",
  journal="ORGANIC ELECTRONICS",
  year="2016",
  volume="39",
  number="1",
  pages="118--126",
  doi="10.1016/j.orgel.2016.09.033",
  issn="1566-1199",
  url="http://www.sciencedirect.com/science/article/pii/S1566119916304256"
}