Stable driving voltage in exciplex-type OLEDs with a bilayer interface

Masahiro Morimoto*, Hikaru Nagahama, Shigeki Naka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Organic light-emitting diodes (OLEDs) that produce exciplexes in a bilayer are device structures that can dramatically reduce the turn-on voltage. In this study, we report that this device structure contributes to an impressive improvement in operating lifetime. The lifetime of our OLED is 200 times longer than that of conventional OLEDs, and the voltage does not change after 100 h of operation. The reason for the stable driving voltage is no carrier accumulation inside the device at all by using a displacement current measurement. Analyzing the carrier dynamics in this work will provide a comprehensive solution for OLED degradation.

Original languageEnglish
Article number081006
JournalApplied Physics Express
Volume17
Issue number8
DOIs
StatePublished - 2024/08/01

Keywords

  • OLED
  • carrier accumulation
  • exciplex
  • operating lifetime

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Stable driving voltage in exciplex-type OLEDs with a bilayer interface'. Together they form a unique fingerprint.

Cite this