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

doi:10.1080/15421400390264162

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

Department of Advanced Device Materials

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	67-73
Number of pages	7
Journal	Molecular Crystals and Liquid Crystals
Volume	405
DOIs	https://doi.org/10.1080/15421400390264162
Publication status	Published - Dec 1 2003

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All Science Journal Classification (ASJC) codes

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

Cite this

Lee, S. B., Yasuda, T., Yang, M. J., Fujita, K., & Tsutsui, T. (2003). Charge carrier mobility in vacuum-sublimed dye films for light-emitting diodes studied by the time-of-flight technique. Molecular Crystals and Liquid Crystals, 405, 67-73. https://doi.org/10.1080/15421400390264162

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10.1080/15421400390264162