Air-stable inverted flexible polymer solar cells using zinc oxide nanoparticles as an electron selective layer

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Steven K. Hau
  • Nam Seob Baek
  • Jingyu Zou
  • Kevin O'Malley

Detail(s)

Original languageEnglish
Article number253301
Journal / PublicationApplied Physics Letters
Volume92
Issue number25
Online published23 Jun 2008
Publication statusPublished - 23 Jun 2008
Externally publishedYes

Abstract

The performance and stability of unencapsulated inverted bulk-heterojunction solar cells with zinc oxide (ZnO) made by different processes as the electron selective contact are compared to conventional bulk-heterojunction solar cells. The low temperature processed inverted devices using ZnO nanoparticles on indium tin oxide plastic substrates showed high power conversion efficiency of ∼3.3%. This inverted device structure possessed much better stability under ambient conditions retaining over 80% of its original conversion efficiency after 40 days while the conventional one showed negligible photovoltaic activity after 4 days. This is due to the improved stability at the poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/Ag interface. © 2008 American Institute of Physics.