Organic electroluminescent device and display unit

Active solid-state devices (e.g. – transistors – solid-state diode – Organic semiconductor material

Reexamination Certificate

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Details

C257S103000, C257SE51028, C257SE51026, C257SE51027, C549S059000

Reexamination Certificate

active

07935962

ABSTRACT:
Disclosed herein is an organic electroluminescent device including: an anode; a cathode; and an organic layer including a light-emitting layer, a naphthacene compound layer containing a naphthacene compound, and an electron transport layer; the light-emitting layer being composed of a light-emitting guest material and an aromatic hydrocarbon compound having the skeleton of anthracene, and the naphthacene compound layer containing no less than 80 wt % of naphthacene compound represented by the formula (1) below and having a thickness of 0.5 to 10 nm and being in contact with that side of the electron transport layer which faces the light-emitting layer.

REFERENCES:
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patent: 2007-503092 (2007-02-01), None
patent: 2005/020283 (2005-03-01), None
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Aziz, Hany & Popovic, Zoran D., “Study of organic light emitting devices with a 5, 6, 11, 12-tetraphenylnaphthacene (rubrene)-doped hole transport layer”, Applied Physics Letters, 80(12):2180-2182, Mar. 25, 2002.
Huang, Jinsong et al., “Improving the power efficiency of white light-emitting diode by doping electron transport material”, Applied Physics Letters, 89, 133509, Sep. 27, 2006.
Li, G. & Shinar, J., “Combinatorial fabrication and studies of bright white organic light-emitting devices based on emission from rubrene-doped 4,4′-bis(2,2′-diphenylvinyl)-1,1′-biphenyl”, Applied Physics Letters, 83(26):5359-5361, Dec. 29, 2003.
Popovic, Z.D. et al., “Life extension of organic LED's by doping of a hole transport layer”, Thin Solid Films, 363:6-8, 2000.
Tsai, Yung-Cheng, “Long-lifetime, high-efficiency white organic light-emitting diodes with mixed host composing double emission layers”, Applied Physics Letters, 89:243521, Dec. 15, 2006.

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