Height of the energy barrier existing between cathodes and hydroxyquinoline-aluminum complex of organic electroluminescence devices

Michio Matsumura, Tomonori Akai, Masayuki Saito, Takashi Kimura

研究成果: Contribution to journalArticle

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抜粋

The properties of organic electroluminescence devices are largely affected by the kind of metals used as the cathode, because the barrier height formed at the interface depends on the electronic and chemical properties of the metals. On the basis of the temperature dependence of currents flowing through the interface between tris(8-hydroxyquinolino)aluminum and a magnesium cathode, the carrier injection mechanism at the interface was ascribed to the thermionic emission with the barrier height of about 0.58±0.03 eV at zero electric field. The barrier height became larger when metals with larger work functions were used as the cathode. The current density was also found to be dependent on the chemical structure of the interfaces.

元の言語英語
ページ(範囲)264-268
ページ数5
ジャーナルJournal of Applied Physics
79
発行部数1
DOI
出版物ステータス出版済み - 1 1 1996
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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