Electroluminescent (EL) devices
AssigneeXerox Corporation
InventorsNan-Xing Hu, Mohammad Esteghamatian, Yu Qi, Zoran D. Popovic, Beng S. Ong, Ah-Mee Hor
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Abstract
An electroluminescent device comprised of an anode, a hole transporting layer, a light emitting layer, and a cathode, wherein said light emitting layer contains a component of the formula ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, and Ar.sup.4 are each independently aryl or optionally aliphatic; R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen, aliphatic, halogen, and cyano; L is a suitable linking group; and n is a number of from 0 to about 3.
Claims37
An electroluminescent device comprised of an anode, a hole transporting layer, a light emitting layer, and a cathode, wherein said light emitting layer contains a component of the formula ##STR22## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, and Ar.sup.4 are each independently aryl or optionally aliphatic;
- R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen, aliphatic, halogen, and cyano;
- L is a conjugated bivalent group;
- and n is a number of from 0 to about 3.
An electroluminescent device comprised of a luminescent or emitting layer comprised of a host and a fluorescent dye, wherein said host material is comprised of components or compounds of the formula ##STR25## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, and Ar.sup.4 are aryl;
- R.sup.1 and R.sup.2 are a substituent independently selected from the group consisting of hydrogen, an alkyl group, an alkoxy group, a halogen, and a cyano group;
- L is a conjugated bivalent group;
- and n represents the number of L segments, and wherein said n is a number of from 0 to about 3.
An organic electroluminescent device comprising in the following sequence an anode, an optional buffer layer, a hole transporting layer, a light emitting layer of a triazine compound, and a cathode;
- and wherein said triazine is of the formula ##STR29## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, and Ar.sup.4 are aromatic, R.sup.1 and R.sup.2 are independently hydrogen, halogen, or aliphatic, L is a conjugated bivalent group, and n represents the number of segments, and wherein said n is a number of from 0 to about 3.
An organic electroluminescent device comprising in sequence an anode comprised of indium tin oxide in a thickness of from about 1 to about 500 nanometers, a buffer layer comprised of a stabilized N,N'-di-1-naphthyl-N,N'-diphenyl-benzidine in a thickness of from about 5 to about 300 nanometers, a 4,4'-bis(9-carbazolyi)-1,1'-biphenyl hole transporting layer in a thickness of from about 1 to about 200 nanometers, a triazine light emitting layer of thickness of about 5 to about 300 nanometers, an optional electron transporting in a thickness of from about 1 to about 300 nanometers, and a metal cathode of a thickness of from about 10 to about 800 nanometers and wherein said triazine is of the formula ##STR30## wherein each Ar is an aromatic component;
- each R is independently an aliphatic component, halogen, or hydrogen;
- n represents the number of repeating segments;
- and where n is a number of from 0 to about 3;
- and L is a conjugated bivalent group.
Dependencies are inferred from the claim text.