US2005019606A1PendingUtilityA1

Organic electroluminescence device emitting white light

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Assignee: IDEMITSU KOSAN COPriority: Dec 28, 1999Filed: May 25, 2004Published: Jan 27, 2005
Est. expiryDec 28, 2019(expired)· nominal 20-yr term from priority
Inventors:Kenichi FukuokaSanae TagamiChishio Hosokawa
C09K 2211/1007Y10S428/917C09K 2211/1011C09K 11/06H05B 33/14C09K 2211/1003C09K 2211/1014H10K 85/633H10K 85/624H10K 50/125H10K 85/60H10K 85/622H10K 2102/103H10K 85/626H10K 85/324H10K 85/631H10K 85/623H10K 85/615H10K 50/11Y02B20/00
46
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Claims

Abstract

An organic electroluminescence device emitting white light which emits white light and exhibits properties sufficient for practical applications, i.e., a high efficiency of light emission and a long life, is provided. The organic electroluminescence device emitting white light comprises a pair of electrodes and a layer of a light emitting medium disposed between the pair of electrodes, wherein the layer of a light emitting medium comprises a light emitting material emitting blue light and a fluorescent compound having at least one structure selected from a fluoranthene skeleton structure, a pentacene skeleton structure and a perylene skeleton structure.

Claims

exact text as granted — not AI-modified
1 . An organic electroluminescence device which comprises a pair of electrodes and a layer of a light emitting medium disposed between the pair of electrodes, wherein the layer of a light emitting medium comprises a material emitting blue light and a fluorescent compound having a perylene skeleton structure, wherein the fluorescent compound has a peak wavelength of fluorescence at 540 nm or more.  
     
     
         2 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium comprises a light emitting layer A comprising the material emitting blue light and the fluorescent compound.  
     
     
         3 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium comprises a light emitting layer emitting blue light and a light emitting layer A which comprises the material emitting blue light and the fluorescent compound.  
     
     
         4 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium comprises a light emitting layer B comprising the material emitting blue light and a layer comprising the fluorescent compound.  
     
     
         5 . (Canceled).  
     
     
         6 . An organic electroluminescence device according to  claim 2 , wherein light emitting layer A further comprises a fluorescent dopant emitting blue light.  
     
     
         7 . An organic electroluminescence device according to  claim 3 , wherein light emitting layer A further comprises a fluorescent dopant emitting blue light.  
     
     
         8 . An organic electroluminescence device according to  claim 4 , wherein light emitting layer B further comprises a fluorescent dopant emitting blue light.  
     
     
         9 . An organic electroluminescence device according to  claim 3 , wherein the light emitting layer emitting blue light further comprises a fluorescent dopant emitting blue light.  
     
     
         10 . (Canceled).  
     
     
         11 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium comprises a hole transporting material or a hole injecting material.  
     
     
         12 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium comprises a hole transporting layer or a hole injecting layer.  
     
     
         13 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium comprises an electron transporting material or an electron injecting material.  
     
     
         14 . An organic electroluminescence device emitting according to  claim 1 , wherein the layer of a light emitting medium comprises an electron transporting layer or an electron injecting layer.  
     
     
         15 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium contacts an anode and comprises an oxidizing agent.  
     
     
         16 . An organic electroluminescence device according to  claim 1 , wherein the layer of a light emitting medium contacts a cathode and comprises a reducing agent.  
     
     
         17 . An organic electroluminescence device according to  claim 1 , wherein a layer of an inorganic compound is disposed between at least one of the electrodes and the layer of a light emitting medium.  
     
     
         18 . An organic electroluminescence device according to  claim 1 , wherein the light emitting material emitting blue light is a styryl derivative, an anthracene derivative or an aromatic amine.  
     
     
         19 . An organic electroluminescence device according to  claim 18 , wherein the styryl derivative is at least one compound selected from distyryl derivatives, tristyryl derivatives, tetrastyryl derivatives and styrylamine derivatives.  
     
     
         20 . An organic electroluminescence device according to  claim 18 , wherein the anthracene derivative is a compound having a phenylanthracene skeleton structure.  
     
     
         21 . An organic electroluminescence device according to  claim 18 , wherein the aromatic amine is a compound having 2 to 4 nitrogen atoms which are substituted with an aromatic group.  
     
     
         22 . An organic electroluminescence device according to  claim 18 , wherein the aromatic amine is a compound having 2 to 4 nitrogen atoms which are substituted with an aromatic group and having at least one alkenyl group.  
     
     
         23 . An organic electroluminescence device according to  claim 6 , wherein the fluorescent dopant emitting blue light is at least one compound selected from styrylamines, styryl compounds substituted with an amine and compounds having a condensed aromatic ring.  
     
     
         24 . An organic electroluminescence device according to  claim 7 , wherein the fluorescent dopant emitting blue light is at least one compound selected from styrylamines, styryl compounds substituted with an amine and compounds having a condensed aromatic ring.  
     
     
         25 . An organic electroluminescence device according to  claim 8 , wherein the fluorescent dopant emitting blue light is at least one compound selected from styrylamines, styryl compounds substituted with an amine and compounds having a condensed aromatic ring.  
     
     
         26 . An organic electroluminescence device according to  claim 9 , wherein the fluorescent dopant emitting blue light is at least one compound selected from styrylamines, styryl compounds substituted with an amine and compounds having a condensed aromatic ring.  
     
     
         27 . An organic electroluminescence device according to  claim 10 , wherein the fluorescent dopant emitting blue light is at least one compound selected from styrylamines, styryl compounds substituted with an amine and compounds having a condensed aromatic ring.  
     
     
         28 . An organic electroluminescence device according to  claim 1 , wherein the fluorescent compound has an electron-donating group.  
     
     
         29 . An organic electroluminescence device according to  claim 1 , wherein the fluorescent compound has a peak wavelength of fluorescence at 540 to 650 nm.  
     
     
         30 . An organic electroluminescence device according to  claim 1 , which emits white light.

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