Organic electroluminescent elements for stable electroluminescent

An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode;

• the organic electroluminescent element includes an organic material or a mixture thereof having the structure:
• wherein:
• R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are individual substituents or a group of substituents, each substituent is individually selected from hydrogen, or alkyl of from 1 to 24 carbon atoms.

An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode;

• the organic electroluminescent element includes an organic material or a mixture thereof having the structure:
• ##STR23## wherein:
• R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are individual substituents or a group of substituents, each substituent is individually selected from aryl or substituted aryl of from 5 to 20 carbon atoms.

An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode;

• the organic electroluminescent element includes an organic material or a mixture thereof having the structure:
• ##STR24## wherein:
• R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are individual substituents or a group of substituents, each substituent is individually selected from carbon atoms necessary to complete a fused aromatic ring of anthracenyl, pyrenyl, or perylenyl.

An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode;

• the organic electroluminescent element includes an organic material or a mixture thereof having the structure:
• ##STR25## wherein:
• R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are individual substituents or a group of substituents, each substituent is individually selected from heteroaryl or substituted heteroaryl of from 5 to 24 carbon atoms, carbon atoms necessary to complete a fused heteroaromatic ring of furyl, thienyl, pyridyl, quinolinyl and other heterocyclic systems.

An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode;

• the organic electroluminescent element includes an organic material or a mixture thereof having the structure:
• ##STR26## wherein:
• R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are individual substituents or a group of substituents, each substituent is individually selected from alkoxyl, amino, alkyl amino, or aryl amino of from 1 to 24 carbon atoms.

An organic EL device comprising an anode, a cathode, and an organic electroluminescent element between the anode and the cathode;

• the organic electroluminescent element includes an organic material or a mixture thereof having the structure:
• ##STR27## wherein:
• R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are individual substituent or a group of substituents, each substituent is individually selected from fluorine, chlorine, bromine or cyano.