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Polymer solar cells with reduced graphene oxide–germanium quantum dots nanocomposite in the hole transport layer

  • Tabitha A. Amollo
  • Genene T. Mola
  • Vincent O. Nyamori
Article
  • 105 Downloads

Abstract

Reduced graphene oxide–germanium quantum dots (rGO–Ge QDs) nanocomposite has been successfully employed in modifying poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the hole transport layer (HTL) in the preparation of a P3HT:PCBM-based polymer solar cell (PSC). The effect of the surface morphology and the optical transmittance of the PEDOT:PSS/rGO–Ge QDs HTL on the devices’ photovoltaic performance is examined. A significant improvement of up to 50% in the power conversion efficiency is achieved by the incorporation of the composite in the HTL. The modified HTL devices exhibited higher short-circuit current density values which resulted from better transportation and collection of photo-generated charge carriers. The synergistic effect of the high electrical conductivity of the composites and the formation of good ohmic contact at the interface between the anode and the active layer not only facilitates charge carrier transport but also impairs their recombination to yield better photovoltaic performance.

Notes

Acknowledgements

The authors are grateful to the National Research Foundation (NRF), the University of KwaZulu-Natal and the UKZN Nanotechnology Platform for supporting this research work.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10854_2018_8781_MOESM1_ESM.docx (3.1 mb)
Supplementary material 1 (DOCX 3172 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Chemistry and PhysicsUniversity of KwaZulu-NatalDurbanSouth Africa
  2. 2.School of Chemistry and PhysicsUniversity of KwaZulu-NatalScottsvilleSouth Africa

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