Polymer composition and polymer light-emitting device using same

Abstract

Disclosed is a composition containing one or more aromatic ether compounds, one or more compounds having a boiling point of not less than 200° C., and one or more polymers which are charge-transporting or luminescent in a solid state. This composition is characterized in that the compounds having a boiling point of not less than 200° C. are selected from the group consisting of aliphatic compounds which may have a heteroatom, alicyclic compounds which may have a heteroatom, aromatic compounds having two or less substituents and a heterocyclic compounds having two or less substituents.

1 . A composition comprising two or more organic compounds having boiling points equal to or higher than 100° C. except for aromatic ether compounds, and one or more polymers that transport charges or emit light in a solid state, characterized in that at least one of the organic compounds are selected from aliphatic compounds that may optionally include a hetero atom and alicyclic compounds that may optionally include a hetero atom, the aliphatic compounds and the alicyclic compounds having boiling points equal to or higher than 200° C. 
     
     
         2 . The composition according to  claim 1 , wherein the organic compounds selected from the aliphatic compounds and the alicyclic compounds having boiling points equal to or higher than 200° C. have melting points equal to or lower than 25° C. 
     
     
         3 . The composition according to  claim 1 , wherein the alicyclic compounds comprise a carbon 6-membered ring structure. 
     
     
         4 . The composition according to  claim 1 , comprising the aliphatic compounds or the alicyclic compounds having boiling points equal to or higher than 200° C. in an amount equal to or greater than 30 wt % based on a total weight of the composition. 
     
     
         5 . The composition according to  claim 1 , wherein the polymers have weight average molecular weights of 1.0×10 3  to 1.0×10 7  relative to polystyrene. 
     
     
         6 . The composition according to  claim 1 , comprising 0.1 to 5.0 wt % of the polymers based on a total weight of the composition. 
     
     
         7 . The composition according to  claim 1 , having a viscosity of 1 to 20 mPa·s. 
     
     
         8 . A thin film characterized by being formed with the composition according to  claim 1 . 
     
     
         9 . The thin film according to  claim 8 , wherein a value obtained by dividing a film thickness of a thickest portion by a film thickness of a central portion of the film is equal to or less than 1.50. 
     
     
         10 . A polymer light-emitting device comprising at least a light-emitting layer between electrodes consisting of an anode and a cathode, characterized in that the light-emitting layer is formed with the composition according to  claim 1  comprising one or more polymers that emit light in a solid state. 
     
     
         11 . A polymer light-emitting device comprising at least a light-emitting layer and a hole transport layer between electrodes consisting of an anode and a cathode, characterized in that the hole transport layer is formed with the composition according to  claim 1  comprising one or more polymers that transport charges. 
     
     
         12 . A polymer light-emitting device comprising at least a light-emitting layer and an electron transport layer between electrodes consisting of an anode and a cathode, characterized in that the electron transport layer is formed with the composition according to  claim 1  comprising one or more polymers that transport charges. 
     
     
         13 . A method for forming the polymer light-emitting device according to  claim 10 , characterized by using a print method. 
     
     
         14 . A method for forming the polymer light-emitting device according to  claim 10 , characterized by using an inkjet method.