Electroluminescence Device

Patent metadata

Field	Value
Publication number	US-2016181537-A1
Application number	US-201414908202-A
Country	US
Kind code	A1
Filing date	Jul 1, 2014
Priority date	Jul 29, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

The present application relates to an electroluminescence device containing a) an anode, b) a cathode, c) at least one emitter layer containing at least one electroluminescent material and arranged between the anode and the cathode, and d) at least one electron transport layer containing at least one material having electron-conducting or predominantly electron-conducting properties and arranged between the at least one emitter layer and the cathode, said device being characterized in that the at least one emitter layer contains a polymer having hole-conducting or predominantly hole-conducting properties. The electroluminescence device according to the invention is distinguished by a high lifetime and a high radiation efficiency.

First claim

1 - 18 . (canceled)

19 . An electroluminescent device comprising
a) an anode; b) a cathode; c) at least one emitter layer which comprises at least one emitter and is disposed between the anode and the cathode; and d) at least one electron transport layer which comprises at least one material having electron-conducting or predominantly electron-conducting properties and is disposed between the at least one emitter layer and the cathode; wherein the at least one emitter layer comprises a polymer having hole-conducting or predominantly hole-conducting properties.

20 . The electroluminescent device of claim 19 , wherein the at least one emitter is incorporated as a repeat unit into the polymer having hole-conducting or predominantly hole-conducting properties.

21 . The electroluminescent device of claim 19 , wherein the emitter is selected from the group consisting of fluorescent and phosphorescent compounds.

22 . The electroluminescent device of claim 21 , wherein the emitter is a phosphorescent metal complex, wherein the metal is selected from the group consisting of transition metals, rare earth elements, lanthanides. and actinides, and is preferably selected from Ir, Ru, Os, Eu, Au, Pt, Cu, Zn, Mo, W, Rh, Pd and Ag.

23 . The electroluminescent device of claim 22 , wherein the metal is selected from the group consisting of Ir, Ru, Os, Eu, Au, Pt, Cu, Zn, Mo, W, Rh, Pd, and Ag.

24 . The electroluminescent device of claim 19 , wherein the polymer having hole conducting or predominantly hole-conducting properties comprises at least one repeat unit selected from amines, triarylamines, thiophenes, carbazoles, phthalocyanines, porphyrins, and the isomers and derivatives thereof.

25 . The electroluminescent device of claim 24 , wherein the polymer having hole conducting or predominantly hole-conducting properties comprises at least one amine repeat unit selected from the group consisting of repeat units of formulae (18) to (20):

wherein
R may be the same or different in each instance and is selected from the group consisting of H, substituted or unsubstituted aromatic or heteroaromatic groups, alkyl groups, cycloalkyl groups, alkoxy groups, aralkyl groups, aryloxy groups, arylthio groups, alkoxycarbonyl groups, silyl groups, carboxyl groups, halogen atoms, cyano groups, nitro groups, and hydroxyl groups;
r is 0, 1, 2, 3, or 4; and
s is 0, 1, 2, 3, 4, or 5.

26 . The electroluminescent device of claim 19 , wherein the polymer having hole-conducting or predominantly hole-conducting properties further comprises structural units which form the backbone of the polymer.

27 . The electroluminescent device of claim 26 , wherein the further structural units which form the backbone of the polymer are selected from the group consisting of fluorene, spirobifluorene, indenofluorene, phenanthrene, dihydrophenanthrene, dibenzothiophene, dibenzofuran, and derivatives thereof.

28 . The electroluminescent device of claim 19 , wherein the polymer having hole-conducting or predominantly hole-conducting properties is a conjugated polymer.

29 . The electroluminescent device of claim 19 , wherein the polymer having hole-conducting or predominantly hole-conducting properties is a non-conjugated or partly conjugated polymer.

30 . The electroluminescent device of claim 29 , wherein the non-conjugated or partly conjugated polymer comprises indenofluorene structural units selected from the group consisting of structural units of formulae (32) and (33):

wherein
X and Y are independently selected from the group consisting of H, F, C 1-40 -alkyl groups, C 2-40 -alkenyl groups, C 2-40 -alkynyl groups, optionally substituted C 6-40 -aryl groups, and optionally substituted 5- to 25-membered heteroaryl groups.

31 . The electroluminescent device of claim 19 , wherein the at least one material having electron-conducting or predominantly electron-conducting properties in the electron transport layer is incorporated as a repeat unit into a polymer in the electron transport layer.

32 . A polymer having hole-conducting or predominantly hole-conducting properties, wherein it has at least one hole-conducting structural unit and at least one emitting structural unit.

33 . The polymer of claim 32 , wherein the polymer is a conjugated polymer.

34 . A formulation comprising at least one polymer of claim 32 and at least one organic solvent.

35 . An electronic device comprising a polymer of claim 32 .

36 . The electronic device of claim 35 , wherein the electronic device is selected from the group consisting of organic light-emitting diodes, polymeric light-emitting diodes, organic light-emitting electrochemical cells, organic field-effect transistors, thin-film transistors, organic solar cells, organic laser diodes, organic integrated circuits, radio frequency identification tags, photodetectors, sensors, logic circuits, memory elements, capacitors, charge injection layers, Schottky diodes, planarization layers, antistatic films, conductive substrates, conductive patterns, photoconductors, electrophotographic elements, organic light-emitting transistors, organic spintronic devices, and organic plasmon-emitting devices, preferably from organic light-emitting diodes (OLEDs).

37 . The electronic device of claim 36 , wherein the electronic device is an organic light-emitting diode.

Assignees

• Merck Patent Gmbh

Inventors

• Pan Junyou
• Meyer Frank Egon

Classifications

• C08G2261/524

  phosphorescent · CPC title

• C08G2261/3162

  Arylamines · CPC title

• C08G2261/12

  Copolymers · CPC title

• C08G2261/95

  Use in organic luminescent diodes · CPC title

• C08G2261/522

  fluorescent · CPC title