White Light Emitting Material

Abstract

A white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group.

1 . A white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group. 
     
     
         2 . A material according to  claim 1 , wherein the material consists of the polymer having an emitting polymer chain and the at least one emitting end capping group. 
     
     
         3 . A material according to  claim 1 , wherein the polymer comprises 2, 3, or, 4 or more different emitting units, each emitting unit emitting a different color; the emitting units being a repeat unit in the polymer chain or the at least one end capping group. 
     
     
         4 . A material according to  claim 1 , wherein the at least one emitting end capping group comprises a phosphorescent end capping group. 
     
     
         5 . A material according to  claim 4 , wherein the phosphorescent end capping group contains a carbon-metal bond. 
     
     
         6 . A material according to  claim 5 , wherein the metal is selected from the group consisting of Pt, Pd, Os, An, Ru, Re, and Ir. 
     
     
         7 . A material according to  claim 6 , wherein the metal is Ir. 
     
     
         8 . A material according to  claim 1 , wherein the emitting polymer chain comprises at least one fluorescent repeat unit. 
     
     
         9 . A material according to  claim 8 , wherein the least one fluorescent repeat unit comprises a blue repeat unit. 
     
     
         10 . A material according to  claim 9 , wherein the blue repeat unit comprises an amine group. 
     
     
         11 . A material according to  claim 9 , wherein the emitting polymer chain further comprises a green fluorescent repeat unit. 
     
     
         12 . A material according to  claim 1 , wherein the polymer has end capping groups selected from the group consisting of red phosphorescent end capping groups and yellow phosphorescent end capping groups. 
     
     
         13 . A material according to  claim 1 , wherein the emitting polymer chain contains at least one non-emitting repeat unit. 
     
     
         14 . A method for making a white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group, said method comprising polymerizing monomers from a polymer feed to form the emitting polymer chain and forming the at least one emitting end capping group by end capping the emitting polymer chain using at least one end capping reagent. 
     
     
         15 . A method according to  claim 14 , wherein the at least one end capping reagent is added to the polymer feed at the outset of or during polymerization. 
     
     
         16 . A method according to  claim 14 , wherein the at least one end capping reagent contains a metal when added to the polymer feed. 
     
     
         17 . A method according to  claim 14 , wherein the at least one end capping reagent comprises end capping reagents selected from the group consisting of end capping reagents for providing red phosphorescent emitting end capping groups in the product polymer and end capping reagents for providing yellow phosphorescent emitting end capping groups in the product polymer. 
     
     
         18 . A method according to  claim 14 , wherein the polymer feed includes monomers for providing blue fluorescent repeat units in the product polymer and optionally monomers for providing green fluorescent repeat units in the product polymer. 
     
     
         19 . A method according to  claim 14 , wherein the polymer feed includes monomers for providing non-emitting repeat units in the product polymer. 
     
     
         20 . An organic light-emitting device containing a white light emitting material comprising a polymer having an emitting polymer chain and at least one emitting end capping group. 
     
     
         21 . An organic light-emitting device according to  claim 20 , wherein the polymer comprises 2, 3, or, 4 or more different emitting units, each emitting unit emitting a different color; the emitting units being a repeat unit in the polymer chain or the at least one end capping group. 
     
     
         22 . An organic light-emitting device according to  claim 20 , wherein a layer of the device consists essentially of the white light emitting material. 
     
     
         23 . An organic light-emitting device according to  claim 20 , wherein a layer of the device comprises a blend of the white light emitting material and one or more other materials. 
     
     
         24 . A light source comprising an organic light-emitting device according to  claim 20 . 
     
     
         25 . A light source according to  claim 24 , the light source being selected from the group consisting of light bulbs and displays.