Triplet exciton confinement and unconfinement by adjacent hole-transport layers

Kenichi Goshi, Raymond Kwong, Julie J. Brown, Hiroyuki Sasabe, Chihaya Adachi

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271 Citations (Scopus)

Abstract

The triplet energy transfer processes from Ir(ppy) 3 into hole-transport layer (HTL) were investigated. The requirements for the triplet energy level of HTLs need to obtained high electrophosphorescence efficiency were also analyzed. It was found that, in the case of TPD, transient PL measurement revealed that the triple excitons in Ir(ppy) 3 were partilaay confined at room temperature. The results show that, employing 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) as a hole-transport layer achieved strong confinement of the Ir(ppy) 3 triplet exciton.

Original languageEnglish
Pages (from-to)7798-7802
Number of pages5
JournalJournal of Applied Physics
Volume95
Issue number12
DOIs
Publication statusPublished - Jun 15 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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