Charge carrier mobility in vacuum-sublimed dye films for light-emitting diodes studied by the time-of-flight technique

Sang Bong Lee, Takeshi Yasuda, Moon Jae Yang, Katsuhiko Fujita, Tetsuo Tsutsui

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The Charge carrier mobility has been examined for a representative organic hole transport material TPD and a host material CBP, doped with a fluorescent dye, rubrene and Ir(ppy)3, by time-of-flight (TOF) technique. Decreasing of hole mobilities of the dye-doped films can be explained by a carrier-trapping model and the ionization potential difference of TPD and CBP. We successfully measured an electron mobility of the rubrene-doped TPD films, and Ir(ppy)3-doped CBP films, while the mobility could not measured non-doped TPD and CBP films. The EL process of the dye-doped systems is discussed in terms of the electron transfer properties of emission layer.

Original languageEnglish
Pages (from-to)67-73
Number of pages7
JournalMolecular Crystals and Liquid Crystals
Volume405
DOIs
Publication statusPublished - Dec 1 2003

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this