High magnetic field effect in organic light emitting diodes

• Goto, Yuichiro

• Noguchi, Takuya

• Takeuchi, Utahito

• Hatabayashi, Kunitada

• Hirose, Yasushi

• Uchida, Takayuki

• Sasaki, Takehiko

• Hasegawa, Tetsuya

• Shimada, Toshihiro

抄録

Fluorescent and phosphorescent organic light emitting diodes (OLEDs) were measured in high magnetic field up to 9 T. The current efficiency steeply increased below 100 mT as reported but gradually decreased when the field was larger. In the range of 0.1-6.5 T, the decrease was proportional to the square of the magnetic field, whereas in the range between 6.5 T and 9 T, it was proportional to the square root of the magnetic field. In contrast, phosphorescent OLED did not show magnetic field dependence. Unipolar devices of n-type Alq3 (tris-(8-hydroxyquinolino) aluminum) and p-type α-NPD (N',N'-Di(naphthalene-1-yl)-N,N'-dipheyl-benzidine) showed positive linear magnetoresistance only for minority carriers. The mechanism of the quadratic dependence of the electroluminescent intensity is discussed based on the experimental results.

収録刊行物

• Organic Electronics

  Organic Electronics 11 (7), 1212-1216, 2010-07

  Elsevier B.V.

キーワード

• Organic light emitting diode
• Magnetoconductance
• Magnetic field
• Minority carrier
• Efficiency

詳細情報

• CRID: 1050001339005873408
• NII論文ID: 120002223717
• HANDLE: 2115/43180
• ISSN: 15661199
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
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  • CiNii Articles
  • KAKEN