Roll-off characteristics of electroluminescence efficiency of organic blue electrophosphorescence diodes

Kyung Soo Son, Masayuki Yahiro, Toshiro Imai, Hiroki Yoshizaki, Junichi Nishide, Hiroyuki Sasabe, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

We studied the relaxation of electroluminescence roll-off characteristics by changing the dopant concentration and thickness of the emitting layer in organic blue electrophosphorescence diodes composed of a 2,6-dicarbazolo-1,5- pyridine host doped with iridium(III)-bis[(4,6-di-fluorophenyl)-pyridinato-N, C2]picolinate. Analyzing the roll-off characteristics using the theoretical models of triplet-triplet annihilation and triplet-polaron annihilation (TPA), we found that the roll-off characteristics of these devices were determined primarily by TPA.

Original languageEnglish
Pages (from-to)7363-7365
Number of pages3
JournalJapanese journal of applied physics
Volume47
Issue number9 PART 1
DOIs
Publication statusPublished - Sep 12 2008

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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