Photovoltaic effect on the performance enhancement of organic light-emitting diodes with planar heterojunction architecture

Dan Zhao, Wei Huang, Hao Guo, Hua Wang*, Junsheng Yu

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Organic light-emitting diodes (OLEDs) with planar heterojunction (PHJ) architecture consisting of photovoltaic organic materials of fullerene carbon 60 (C60) and copper (II) phthalocyanine (CuPc) inserted between emitting unit and cathode were constructed, and the photovoltaic effect on OLEDs performance was studied. The electroluminescent (EL) characteristics and mechanism of device performance variation without and with different PHJs (herein including C60/CuPc, CuPc/C60 and CuPc) were systematically investigated in red, green and blue OLEDs. Of the three combinations, OLEDs with C60/CuPc showed the highest efficiency. It is revealed that the photovoltaic C60/CuPc PHJ can absorb part of photons, which are radiated from emission zone, then form excitons, and dissociated into free charges. Consequently, the high device efficiency of OLEDs performance improvement was acquired. This research demonstrates that PHJ consisting of two n- and p-type photovoltaic organic materials could be a promising methodology for high performance OLEDs.

Original languageEnglish (US)
Pages (from-to)7-13
Number of pages7
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume218
DOIs
StatePublished - Apr 1 2017

Keywords

  • Organic light-emitting diodes
  • Photovoltaic effect
  • Planar heterojunctions

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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