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

Irene Gonzalez-Valls, Dechan Angmo, Suren Gevorgyan, Juan Sebastian Reparaz, Frederik C Krebs, Monica Lira-Cantu

Research output: Contribution to journalJournal articleResearchpeer-review


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.
Original languageEnglish
JournalJournal of Polymer Science. Part B, Polymer Physics
Issue number4
Pages (from-to)272–280
Publication statusPublished - 2013


  • Cross-section analyses
  • Interfaces
  • Interpenetrating networks (IPN)
  • Inverted configuration
  • Nanorod length
  • Nanotechnology
  • Photophysics
  • Polymer infiltration
  • Polymer solar cells
  • TEM
  • ZnO nanorods


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