Extremely efficient indium-tin-oxide-free green phosphorescent organic light-emitting diodes

Adv Mater. 2012 Aug 16;24(31):4337-42. doi: 10.1002/adma.201202035. Epub 2012 Jul 12.

Abstract

This paper demonstrates extremely efficient (η(P,max) = 118 lm W(-1) ) ITO-free green phosphorescent OLEDs (PHOLEDs) with multilayered, highly conductive poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) films as the anode. The efficiency is obtained without any outcoupling-enhancing structures and is 44% higher than the 82 lm W(-1) of similar optimized ITO-anode PHOLEDs. Detailed simulations show that this improvement is due largely to the intrinsically enhanced outcoupling that results from a weak microcavity effect.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Electrodes
  • Luminescent Agents / chemistry
  • Polystyrenes / chemistry
  • Solvents / chemistry
  • Thiophenes / chemistry
  • Tin Compounds / chemistry*

Substances

  • Luminescent Agents
  • Polystyrenes
  • Solvents
  • Thiophenes
  • Tin Compounds
  • poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
  • indium tin oxide