High-performance hybrid buffer layer using 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile/molybdenum oxide in inverted top-emitting organic light-emitting diodes

Cheol Hwee Park, Hyun Jun Lee, Ju Hyun Hwang, Kyu Nyun Kim, Yong Sub Shim, Sun Gyu Jung, Chan Hyuk Park, Young Wook Park, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

A high-performance 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile (HATCN)/molybdenum oxide (MoO3) hybrid buffer layer with high hole-injection efficiency and superior plasma resistance under the sputtering process was developed. The HATCN enhances the hole-injection efficiency, and the MoO3 effectively protects the underlying organic layers from plasma damage during deposition by sputtering. This improves the characteristics of inverted top-emitting organic light-emitting diodes using a top transparent conductive oxide electrode. The device using the hybrid buffer layer showed the highest electroluminescence characteristics among devices with other buffer layers. The high hole-injection efficiency of HATCN was shown by the J-F curve of hole-only devices, and the plasma protection performance of MoO3 was shown by atomic force microscope surface morphology images of the buffer layer film after O2 plasma treatment.

Original languageEnglish
Pages (from-to)6047-6053
Number of pages7
JournalACS Applied Materials and Interfaces
Volume7
Issue number11
DOIs
Publication statusPublished - 2015 Mar 25

Keywords

  • 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile (HATCN)
  • buffer Layer
  • inverted top-emitting organic light-emitting diodes (ITEOLEDs)
  • molybdenum oxide (MoO)

ASJC Scopus subject areas

  • Materials Science(all)

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