High-efficiency blue-green electrophosphorescent light-emitting devices using a bis-sulfone as host in the emitting layer

Sung Jin Kim, Julie Leroy, Carlos Zuniga, Yadong Zhang, Lingyun Zhu, John S. Sears, Stephen Barlow, Jean Luc Brédas, Seth R. Marder, Bernard Kippelen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


A bis-sulfone small molecule, 4,4′-bis(phenylsulfonyl)biphenyl has been evaluated as a host for the phosphor iridium(III) bis(2-(4,6- difluorophenyl)pyridinato-N,C2′)picolinate in blue-green organic light-emitting devices. In addition, a poly(norbornene)-based polymer functionalized with a 3,6-bis(carbazol-9-yl)carbazole moiety as a side group is utilized as a solution-processible hole-transport layer; comparison is made to the widely-used hole-transport polymer poly(N-vinylcarbazole) (PVK). At 100 cd/m2, the highest efficiency device incorporating the new polymer achieved an external quantum efficiency (EQE) of 6.9% (12.9 cd/A) with a turn-on voltage of 4.3 V. In comparison, the highest efficiency device using PVK achieved an EQE of 6.4% (11.3 cd/A) with a turn-on voltage of 6.0 V.

Original languageEnglish (US)
Pages (from-to)1314-1318
Number of pages5
JournalOrganic Electronics
Issue number8
StatePublished - Aug 2011

Bibliographical note

Funding Information:
This material is based upon work supported by Solvay SA and in part by the STC Program of the National Science Foundation under Agreement No. DMR-0120967. We are grateful to Jean-Pierre Catinat and Véronique Mathieu for measuring the adiabatic triplet energy of SO1.


  • Organic light emitting diodes
  • Phosphorescence

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry
  • Electrical and Electronic Engineering


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