US 5,792,557 A · Organic EL element

Abstract

Tetraaryldiamie derivatives of formula (1) are used in organic EL elements. ##STR1## R.sub.1, R.sub.2, R.sub.3, and R.sub.4 represent aryl, alkyl, alkoxy, aryloxy, amino or halogen, at least one of R.sub.1 to R.sub.4 is an, aryl group, r1, r2, r3, and r4 are 0 or an integer of 1 to 5, the sum of r1 to r4 is at least 1, R.sub.5 and R.sub.6 represent alkyl, alkoxy, amino or halogen, r5 and r6 are 0 or an integer of 1 to 4. The inventive compounds have high m.p. and high Tg and can be evaporated to deposit tranparent smooth thin films of quality which maintain a stable amorphous state are room temperature over a long term. Organic EL elements using the invertive compound in an organic compound layer, typically a hole injecting and transporting layer thereof provide uniform plane light emission and maintain a high intensity of luminescence in a stable manner over a long term. Thus the elements are fully durable and reliable.

Claims38

Dependent claims

An organic electroluminescent element comprising two electrodes and a layer between said electrodes containing at least one organic electroluminescent element forming compound of the following formula (2):

##STR1063## wherein A.sub.1, A.sub.2, A.sub.3, and A.sub.4, which may be identical or different, are aryl groups attached to the corresponding benzene ring at the para- or meta-position with respect to the position of attachment to the nitrogen atom,
R.sub.7, R.sub.8, R.sub.9, and R.sub.10, are independently selected from the group consisting of an alkyl group, alkoxy group, aryl group, aryloxy group, amino group and halogen atom,
r7, r8, r9, and r10 are independently 0 or an integer of 1 to 4,
R.sub.5 and R.sub.6 are independently selected from the group consisting of an alkyl group, alkoxy group, amino group, and halogen atom, and
r5 and r6 are independently 0 or an integer of 1 to 4.

2 more elements

An organic electroluminescent element comprising two electrodes and a layer between said electrodes containing at least one organic electroluminescent element-forming compound of the following formula (3):

##STR1070## wherein Ar is an aryl group attached to the corresponding benzene ring at the para- or meta-position with respect to the position of attachment to the nitrogen atom,
Z.sub.1, Z.sub.2, and Z.sub.3 are independently selected from the group consisting of an alkyl group, alkoxy group, aryl group, aryloxy group, amino group and halogen atom, one or two of Z.sub.1, Z.sub.2, and Z.sub.3 is an aryl group attached to the corresponding benzene ring at the para- or meta-position with respect to the position of attachment to the nitrogen atom, with the proviso that when two of Ar, Z.sub.1, Z.sub.2, and Z.sub.3 are aryl groups, at least one of Ar, Z.sub.1, Z.sub.2, and Z.sub.3 is attached to the corresponding benzene ring at the meta-position with respect to the position of attachment to the nitrogen atom or two of Ar, Z.sub.1, Z.sub.2, and Z.sub.3 are diarylamino aryl groups attached to the corresponding ring at the para-position with respect to the position of attachment to the nitrogen atom,
s1, s2, and s3 are independently 0 or an integer of 1 to 5, the sum of s1, s2, and s3 is an integer of at least 1,
R.sub.0 is selected from the group consisting of an alkyl group, alkoxy group, aryl group, aryloxy group, amino group and halogen atom,
r0 is 0 or an integer of 1 to 4,
R.sub.5 and R.sub.6 are independently selected from the group consisting of an alkyl group, alkoxy group, amino group, and halogen atom, and
r5 and r6 are independently 0 or an integer of 1 to 4.

4 more elements

Dependencies are inferred from the claim text.

Organic EL element

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Organic EL element

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Abstract

Claims38