Zinc Oxide-Perylene Diimide Hybrid Electron Transport Layers for Air-Processed Inverted Organic Photovoltaic Devices

Edward Cieplechowicz, Rahim Munir, Michael A. Anderson, Erin L. Ratcliff, Gregory C. Welch

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, we report the formation of perylene diimide films, from green solvents, for use as electron transporting layers, when combined with ZnO, in inverted-type organic photovoltaics. A modified N-annulated PDI was functionalized with a tert-butyloxycarbonyl protecting group to solubilize the material, enabling solution processing from green solvents. Post-deposition treatment of films via thermal annealing cleaves the protecting group yielding the known PDIN-H material, rendering films solvent-resistant. The PDIN-H films were characterized by optical absorption spectroscopy, contact angle measurements, and atomic force microscopy. When used to modify the surface of ZnO in inverted-type organic photovoltaics (air-processed and tested) based on the PM6:Y6 and PTQ10:Y6 bulk-heterojunctions, the device power conversion efficiency increases from 9.8 to 11.0% and 7.2 to 9.8%, respectively.

Original languageEnglish (US)
Pages (from-to)49096-49103
Number of pages8
JournalACS Applied Materials and Interfaces
Volume13
Issue number41
DOIs
StatePublished - Oct 20 2021

Keywords

  • cathodic interlayer
  • green solution processing
  • organic photovoltaics
  • perylene diimide
  • slot-die coating

ASJC Scopus subject areas

  • Materials Science(all)

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