Organic Electronic Material, Ink Composition Containing Same, and Organic Thin Film, Organic Electronic Element, Organic Electroluminescent Element, Lighting Device, and Display Device Formed Therewith

Abstract

Provided are: an organic electronic material which can be easily multilayered and that can be used in substrates, such as resin, that cannot be processed at high temperatures; an ink composition containing the same; an organic thin film formed using said organic electronic material or said ink composition; and an organic electronic element and an organic EL element that are formed using said organic thin film and that have a superior luminous efficacy and emission lifespan than conventional elements. Specifically, provided are: an organic electronic material that is characterized by containing an oligomer or a polymer having a structure that branches into three or more directions and has at least one polymerizable substituent; an ink composition containing said organic electronic material; and an organic thin film prepared using the aforementioned organic electronic material. Further, provided are an organic electronic element and an organic electroluminescent element containing said organic thin film.

1 . An organic electronic material comprising a polymer or oligomer which has a structure branching in three or more directions and has at least one polymerizable substituent. 
     
     
         2 . The organic electronic material according to  claim 1 , wherein the polymer or oligomer contains at least any one of the structures of the following formulas (1) to (10) as a unit serving as the starting point for forming the branched structure: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         (wherein Ar's each independently represent a divalent linking group, each representing an arylene group or heteroarylene group having 2 to 30 carbon atoms; W represents a trivalent linking group, which is an atomic group obtained by further excluding one hydrogen atom from the arylene group or the heteroarylene group and may be substituted; Y's each independently represent a divalent linking group; and Z represents any one of a carbon atom, a silicon atom and a phosphorus atom.) 
       
     
     
         3 . The organic electronic material according to  claim 2 , wherein Y in the formula (4) or (7) is a divalent linking group represented by one of the following formulas: 
       
         
           
           
               
               
           
         
         (wherein R's each independently represent a hydrogen atom, an optionally substituted, linear, cyclic or branched alkyl group having 1 to 22 carbon atoms, or an optionally substituted aryl group or heteroaryl group having 2 to 30 carbon atoms.) 
       
     
     
         4 . The organic electronic material according to  claim 1 , wherein the polymer or oligomer contains at least one charge transporting group. 
     
     
         5 . The organic electronic material according to  claim 1 , wherein the polymer or oligomer contains at least one polymerizable substituent. 
     
     
         6 . The organic electronic material according to  claim 5 , wherein the polymerizable substituent is introduced into an end of the polymer or oligomer. 
     
     
         7 . The organic electronic material according to  claim 5 , wherein three or more of the polymerizable substituents are introduced into one molecule of the polymer or oligomer. 
     
     
         8 . The organic electronic material according to  claim 5 , wherein the polymerizable substituent is any one of an oxetane group, an epoxy group, a vinyl group, an acrylate group and a methacrylate group. 
     
     
         9 . The organic electronic material according to  claim 1 , wherein the polymer or oligomer has a partial structure represented by one of the following formulas: 
       
         
           
           
               
               
           
         
         (wherein A 1  and A 2  each independently represent a trivalent linking group; A 3  and A 4  each independently represent a tetravalent linking group; L 1  to L 10  each independently represent a divalent linking group; X m  represents a divalent linking group; n represents an integer of 1 or greater; and m represents 1 or an integer from 1 to n.) 
       
     
     
         10 . The organic electronic material according to  claim 1 , wherein the number average molecular weight of the polymer or oligomer is from 1,000 to 1,000,000. 
     
     
         11 . The organic electronic material according to  claim 1 , wherein the polydispersity of the polymer or oligomer is greater than 1.0. 
     
     
         12 . The organic electronic material according to any  claim 1 , further comprising a dopant. 
     
     
         13 . The organic electronic material according to  claim 1 , further comprising a polymerization initiator. 
     
     
         14 . The organic electronic material according to  claim 13 , wherein the polymerization initiator is a thermal polymerization initiator. 
     
     
         15 . The organic electronic material according to  claim 13 , wherein the polymerization initiator is an ionic compound. 
     
     
         16 . The organic electronic material according to  claim 14 , wherein the polymerization initiator also functions as a dopant. 
     
     
         17 . An ink composition comprising the organic electronic material according to  claim 1 . 
     
     
         18 . An organic thin film produced using the organic electronic material according to  claim 1 . 
     
     
         19 . An organic electronic element comprising the organic thin film according to  claim 18 . 
     
     
         20 . An organic electroluminescent element comprising the organic thin film according to  claim 18 . 
     
     
         21 - 26 . (canceled) 
     
     
         27 . A display element comprising the organic electroluminescent element according to  claim 20 . 
     
     
         28 . A lighting device comprising the organic electroluminescent element according to  claim 20 . 
     
     
         29 . A display device comprising the lighting device according to  claim 28 , and a liquid crystal element as a display unit. 
     
     
         30 . An organic thin film produced using the ink composition according to  claim 17 .