Title:
ORGANIC THIN FILM EL ELEMENT
Document Type and Number:
Japanese Patent JP3497283
Kind Code:
B2
Abstract:
PURPOSE: To obtain an organic thin film EL element with a long service life and an excellent durability, which reduces the generation of a support extensively, smooths the interface between a positive electrode and a hole carrier layer, reduces the emission starting threshold voltage, improves the emission brightness and the emission efficiency, and reduces the aging change.
CONSTITUTION: This organic thin film EL element comprises at least more than one of positive electrodes laminated on a transparent glass substrate 5 in order; a hole carrier layer 2 consisting on an organic compound layer; a luminous layer 3, and the like; and a negative electrode 4. The maximum value Rmax of the surface roughness of the positive electrode 6 is made less than 50nm, or the average value Ra of the surface roughness of the positive electrode 6 is made less than 5nm, and/or the contact angle of the surface of the positive electrode 6 to the water is made less than 20°.
Inventors:
Shintaro Hara
Akira Gyotoku
Hideaki Iwanaga
Akira Gyotoku
Hideaki Iwanaga
Application Number:
JP15157795A
Publication Date:
February 16, 2004
Filing Date:
June 19, 1995
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H05B33/28; H01L51/50; H05B33/12; H05B33/26; H01L51/52; (IPC1-7): H05B33/28
Domestic Patent References:
| JP487187A | ||||
| JP4264391A | ||||
| JP7220873A |
Other References:
吉見友明ら、有機発光素子の高性能化におけるＩＴＯ−ＴＰＤ界面制御の効果、信学技報、Ｖｏｌ．９１、Ｎｏ．４４４（ＯＥＭ９１−４４〜５１、社団法人電子情報通信学会、１９９２年１月２４日、Ｐ４３−４８
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)
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