Impacts of degradation on annihilation and efficiency roll-off in organic light-emitting devices

John S. Bangsund, Russell J. Holmes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Efficiency roll-off and intrinsic luminance degradation are two of the primary limitations of organic light-emitting devices (OLEDs). While both phenomena have been studied separately in detail, they are rarely considered together. Previous analyses of OLED degradation have largely neglected changes in efficiency roll-off and bimolecular quenching, and the magnitude of these changes and their impact on device lifetime remains unclear. We present experimental and modeling results to quantify the magnitude of these changes, which we find range from ∼2% to above 10% in magnitude and increase in importance at high brightness or in devices with significant exciton-exciton annihilation.

Original languageEnglish (US)
Title of host publicationOrganic and Hybrid Light Emitting Materials and Devices XXIII
EditorsChihaya Adachi, Jang-Joo Kim, Franky So
PublisherSPIE
ISBN (Electronic)9781510628793
DOIs
StatePublished - Jan 1 2019
EventOrganic and Hybrid Light Emitting Materials and Devices XXIII 2019 - San Diego, United States
Duration: Aug 11 2019Aug 13 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11093
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOrganic and Hybrid Light Emitting Materials and Devices XXIII 2019
CountryUnited States
CitySan Diego
Period8/11/198/13/19

Keywords

  • Bimolecular quenching
  • OLED
  • Operational lifetime
  • Phosphorescence
  • Photoluminescence
  • Triplet-polaron quenching

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