Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes

Jae Wook Kang, Deug Sang Lee, Hyung Dol Park, Young Seo Park, Ji Whan Kim, Won Ik Jeong, Kyung Mo Yoo, Kyoungmoon Go, Se Hoon Kim, Jang Joo Kim

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

One of the important factors for high efficiency phosphorescent organic light-emitting devices is to confine triplet excitons within the emitting layer. We synthesized and characterized a new hole blocking material containing silane and triazine moieties, 2,4-diphenyl-6-(4′-triphenylsilanyl-biphenyl-4-yl) -1,3,5-triazine (DTBT). Electrophosphorescent devices fabricated using the material as the hole-blocking layer and N,N′-dicarbazolyl-4,4′- biphenyl (CBP) doped with fac-tris(2-phenylpyridine)iridium [Ir(ppy) 3] as the emitting layer showed a maximum external quantum efficiency (ηext) of 17.5% with a maximum power efficiency (ηp) of 47.8 lm W-1, which are much higher than those of devices using bathcuproine (BCP) (ηext = 14.5%, ηp = 40.0 lm W-1) and 4-biphenyloxolate aluminium(iii) bis(2-methyl-8-quinolinato)-4-phenylphenolate (BAlq) (ηext = 8.1%, ηp = 14.2 lm W-1) as hole-blocking layers.

Original languageEnglish
Pages (from-to)3714-3719
Number of pages6
JournalJournal of Materials Chemistry
Volume17
Issue number35
DOIs
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes'. Together they form a unique fingerprint.

  • Cite this

    Kang, J. W., Lee, D. S., Park, H. D., Park, Y. S., Kim, J. W., Jeong, W. I., Yoo, K. M., Go, K., Kim, S. H., & Kim, J. J. (2007). Silane- and triazine-containing hole and exciton blocking material for high-efficiency phosphorescent organic light emitting diodes. Journal of Materials Chemistry, 17(35), 3714-3719. https://doi.org/10.1039/b705741e