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Comparison of Two Types of Vertically Aligned ZnO NRs for Highly Efficient Polymer Solar Cells

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Authors:
  • Gonzalez-Valls, Irene ;
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    Centre de Investigaciò en Nanociencia i Nanotecnologia
  • Angmo, Dechan ;
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    Department of Energy Conversion and Storage, Technical University of Denmark
  • Gevorgyan, Suren ;
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    Orcid logo0000-0001-9906-5485
    Department of Energy Conversion and Storage, Technical University of Denmark
  • Reparaz, Juan Sebastian ;
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    Catalan Institute of Nanotechnology
  • Krebs, Frederik C ;
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    Orcid logo0000-0003-1148-4314
    Department of Energy Conversion and Storage, Technical University of Denmark
  • Lira-Cantu, Monica
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    Centre de Investigaciò en Nanociencia i Nanotecnologia
DOI:
10.1002/polb.23214
Abstract:
Vertically aligned ZnO nanorods (NR) are prepared by two different synthesesmethods and applied on polymer solar cells (PSCs). The ZnO electrodes work as the electron transport layer with the P3HT:PCBM blend acting as the active material. Several organic blend solution conditions are optimized: concentration, solvent, and deposition speed. The effect of different NR electrode morphologies is analyzed on the solar cell performance and characterized by current–voltage curves and IPCE analyses. The photovoltaic performance of the solar cells was observed to be influenced by many factors, among them infiltration of the organic P3HT:PCBM blend within the ZnO NR layer. The infiltration of the active layer was monitored by cross section SEM and energy dispersive X-ray spectroscopy analyses. Our results show that higher power conversion efficiencies are achieved when shorter NRs lengths are applied. The best power conversion efficiency obtained was 2.0% for a 400 nm ZnO NR electrode. © 2012 Wiley Periodicals, Inc.
Type:
Journal article
Language:
English
Published in:
Journal of Polymer Science. Part B, Polymer Physics, 2013, Vol 51, Issue 4
Keywords:
Cross-section analyses; Interfaces; Interpenetrating networks (IPN); Inverted configuration; Nanorod length; Nanotechnology; Photophysics; Polymer infiltration; Polymer solar cells; TEM; ZnO nanorods
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2012
Scientific Level:
Scientific
ID:
234970482

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