The investigation of light outcoupling in blue top-emitting OLEDs

Ling Ling Deng, Shu Fen Chen, Huang Wei, Liu Bin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

A classic electromagnetic theory is used in this paper to investigate the light outcoupling in blue top-emitting organic light-emitting devices (TEOLEDs) with a samarium/silver (Sm/Ag) bilayer cathode. With the method, the outcoupling efficiency and the spectra of the devices with different top-electrodes and outcoupling layers were simulated. The calculated results demonstrate that in the devices, the increasing thickness of the Ag film would result in the redshift of blue emission and the decrease of emission intensity. While the thickness of the Sm film only influences the emission intensity of the devices. The thickness of the outcoupling layer is varied to obtain the saturated and efficient blue emission and then the optimal thickness is determined. The microcavity effect induced mainly by the bilayer cathode with a relatively high reflectivity is considered to explain the optical characteristics of the blue TEOLEDs, including some abnormal phenomena. The simulated results show good agreement with the measured data.

Original languageEnglish
Title of host publicationLED and Display Technologies
DOIs
StatePublished - 2010
Externally publishedYes
EventLED and Display Technologies - Beijing, China
Duration: 18 Oct 201019 Oct 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7852
ISSN (Print)0277-786X

Conference

ConferenceLED and Display Technologies
Country/TerritoryChina
CityBeijing
Period18/10/1019/10/10

Keywords

  • Blue emission
  • Efficiency
  • Electromagnetic theory
  • Interference
  • Microcavity effect
  • Outcoupling
  • Simulation
  • TEOLED

Fingerprint

Dive into the research topics of 'The investigation of light outcoupling in blue top-emitting OLEDs'. Together they form a unique fingerprint.

Cite this