JP2003201472A5

JP2003201472A5 -

Info

Publication number: JP2003201472A5
Application number: JP2002305258A
Authority: JP
Filing date: 2002-10-21
Publication date: 2004-12-16
Anticipated expiration: 2022-10-21

Description

【０１１６】
実施例８〜３４および比較例３〜６
洗浄したＩＴＯ電極付きガラス板上に、４，４’−ビス［Ｎ−（１−ナフチル）−Ｎ−フェニルアミノ］ビフェニル（α−ＮＰＤ）を真空蒸着して膜厚３０ｎｍの正孔注入層を形成した。次いで、表１の化合物を真空蒸着し、膜厚３０ｎｍの発光層を得た。さらに、ビス（２−メチル−８−ヒドロキシキノリナート）（フェノラート）ガリウム錯体を真空蒸着して膜厚３０ｎｍの電子注入層を作成し、その上に、マグネシウムと銀を１０：１（重量比）で混合した合金で膜厚１００ｎｍの電極を形成して有機ＥＬ素子を得た。各層は１０^-6Ｔｏｒｒの真空中で、基板温度室温の条件下で蒸着した。この素子の発光特性を表２に示す。本実施例の有機ＥＬ素子は全て、最大発光輝度３５０００（ｃｄ／ｍ²）以上の高い輝度特性を示した。同様に比較例として、前記比較化合物Ａ〜Ｄを成膜して用いる以外は、実施例８と同様の方法で有機ＥＬ素子を作製した。この素子の発光特性を表２に併せて示す。いずれの場合も、最大発光輝度、最大発光効率共に、本実施例で作成した素子よりも劣っていることは明らかである。[0116]
Examples 8 to 3 4 and Comparative Examples 3 to 6
4,4'-Bis [N- (1-naphthyl) -N-phenylamino] biphenyl (α-NPD) is vacuum-deposited on a cleaned glass plate with an ITO electrode to form a hole injection layer with a thickness of 30 nm. Formed. Next, the compounds shown in Table 1 were vacuum-deposited to obtain a light emitting layer having a film thickness of 30 nm. Further, a bis (2-methyl-8-hydroxyquinolinate) (phenolat) gallium complex is vacuum-deposited to form an electron-injected layer having a film thickness of 30 nm, and magnesium and silver are placed on the electron-injected layer in a 10: 1 (weight ratio). ) Was used to form an electrode having a film thickness of 100 nm to obtain an organic EL element. Each layer was deposited in a vacuum of ^10-6 Torr under the conditions of substrate temperature room temperature. Table 2 shows the light emission characteristics of this device. All of the organic EL elements of this embodiment showed high brightness characteristics of a maximum emission brightness of 35,000 (cd / m ² ) or more. Similarly, as a comparative example, an organic EL device was produced by the same method as in Example 8 except that the comparative compounds A to D were formed into a film and used. The emission characteristics of this device are also shown in Table 2. In either case, it is clear that both the maximum emission brightness and the maximum emission efficiency are inferior to the elements produced in this embodiment.

【０１１７】
【表２】

[0117]
[Table 2]