Balanced electron and hole injection and transport in OLEDs by using transparent electrodes

Sahar Alasvand Yazdani, Fatima Bencheikh, Ryutaro Komatsu, Amir Mikaeili, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, electron and hole injection, and transport in semi-transparent organic light-emitting diodes, including dielectric/metal/dielectric (DMD) electrodes, were investigated. The DMD electrode was modified by incorporating a 5 nm-thick Cs:MoOx layer and a 10 nm-thick 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HATCN) layer to improve the electron and hole injection in standard and inverse structures, respectively. The inverse structure showed a reasonably good and stable external quantum efficiency due to the well-balanced carrier densities at both low and high voltages which was confirmed by an electrical simulation study. Also, the peak position of the hole and electron recombination rate in the inverse structure was located on the ITO side, which is beneficial for reducing exciton quenching and photon absorption by metallic electrodes.

Original languageEnglish
Article number088002
JournalJapanese journal of applied physics
Volume61
Issue number8
DOIs
Publication statusPublished - Aug 1 2022

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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