Electrical and Luminescent Properties of Color-Changeable Organic Electroluminescent Diode Using Squarylium Dyes.

• Mori Tatsuo

  Department of Electrical Engineering, School of Engineering, Nagoya University Furo–cho, Chikusa–ku, Nagoya 464–01

• Miyachi Kiyokazu

  Department of Electrical Engineering, School of Engineering, Nagoya University Furo–cho, Chikusa–ku, Nagoya 464–01

• Kichimi Tomoaki

  Department of Electrical Engineering, School of Engineering, Nagoya University Furo–cho, Chikusa–ku, Nagoya 464–01

• Mizutani Teruyoshi

  Department of Electrical Engineering, School of Engineering, Nagoya University Furo–cho, Chikusa–ku, Nagoya 464–01

抄録

The organic electoluminescent diode (LED) with squarylium (Sq) dye-doped Alq3 changes color upon application of voltage (current). The luminescent color from the organic LED changes from red (electroluminescence (EL) of Sq dye) at low voltage to light green (EL of Alq3) at high voltage. We studied the EL efficiency and EL spectrum of organic Sq-doped Alq3 LED with various doping positions in the emission layer. Consequentially, it was clarified that Sq doping near TPD considerably reduced the EL efficiency. The EL mechanism of the organic LED was concluded to be associated with the energy transfer from the excited Alq3 to the guest dye and hole trapping of the guest dye in Alq3.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 33 (12A), 6594-6598, 1994

  The Japan Society of Applied Physics

キーワード

• organic LED
• dye-doping method
• squarylium dye
• electroluminescence
• color-changeable

詳細情報

• CRID: 1390282681222483968
• NII論文ID: 210000036265
• NII論文ID: 30021821411
• NII論文ID: 130004519584
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.33.6594
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.33.6594
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.33.6594/pdf
• 本文言語コード: en
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