Efficient zinc phthalocyanine/C60 heterojunction photovoltaic devices employing tetracene anode interfacial layers

Tyler B. Fleetham, John P. Mudrick, Weiran Cao, Kody Klimes, Jiangeng Xue, Jian Li

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

We report the development of efficient small molecular organic photovoltaic devices incorporating tetracene anode interfacial layers. Planar heterojunction devices employing the tetracene anode interfacial layer achieved an EQE enhancement of 150% in the spectral region corresponding to ZnPc absorption. We demonstrate that this enhancement is due to the combined effect of the tetracene layer providing exciton-blocking at the anode/donor interface and potentially an increase in the exciton diffusion length in the ZnPc layer due to increased crystallinity and more preferred molecular stacking orientation. A power conversion efficiency of 4.7% was achieved for a planar heterojunction of a modified zinc phthalocyanine based material and C60 when employing the tetracene anode interfacial layer. By utilizing a planar-mixed heterojunction structure a peak EQE of nearly 70% and a power conversion efficiency of 5.8% was achieved.

Original languageEnglish (US)
Pages (from-to)7254-7259
Number of pages6
JournalACS Applied Materials and Interfaces
Volume6
Issue number10
DOIs
StatePublished - May 28 2014

    Fingerprint

Keywords

  • exciton blocker
  • morphology
  • organic photovoltaics
  • planar-mixed heterojunction
  • small molecule

ASJC Scopus subject areas

  • Materials Science(all)

Cite this