High-efficiency carrier injection characteristics of dixanthene derivatives in organic light-emitting diodes

Masafumi Yoshida, Teppei Tsuchida, Takaaki Kurata, Masaaki Ikeda, Hiroyuki Sasabe, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We demonstrate that benzo[1,2,3-kl:4,5,6-k′7′]dixanthene (BDX) derivatives show high-efficiency carrier injection in organic light-emitting diodes (OLEDs). Using 3,11-dibromobenzo[1,2,3-kl:4,5,6-k′T′] dixanthene (BDX6) as a hole injection layer (HIL), we achieved a low driving voltage of 8.12±0.10V in obtaining a current density of J = 100mA/cm 2. The hole injection characteristics were superior to those of a device with a conventional CuPc layer as a HIL. On the other hand, inserting benzo[1,2,3-kl:4,5,6-k′l′]dixanthene (BDX1) as an electron injection layer (EIL) efficiently decreased driving voltage, indicating a superior electron injection capability compared with a device without a BDX1 EIL. We show that carrier injection efficiency can be well controlled by the substituent groups of BDX, thus providing efficient hole and electron injection layers.

Original languageEnglish
Pages (from-to)410-411
Number of pages2
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number1 A
DOIs
Publication statusPublished - Jan 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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