Phosphine precursor for preparing quantum dot and quantum dot prepared therefrom

Abstract

The present invention relates to a phosphine precursor for the preparation of a quantum dot, and a quantum dot prepared therefrom. Using the phosphine precursor for the preparation of a quantum dot of the present invention, a quantum dot with improved luminous efficiency and higher luminous color purity can be provided.

What is claimed is: 
     
         1 . A phospine precursor for the preparation of a quantum dot, represented by the following Chemical Formula 1: 
       
         
           
           
               
               
           
         
         in the Chemical Formula 1, 
         Q 1  is 
       
       
         
           
           
               
               
           
         
         Q 2  is 
       
       
         
           
           
               
               
           
         
         Q 3  is 
       
       
         
           
           
               
               
           
         
         wherein R1 to R9 are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl, 
         provided that all Q 1  to Q 3  are not the same structure. 
       
     
     
         2 . The phospine precursor according to  claim 1 , wherein R 1  to R 9  are each independently, C1-6 linear alkyl, C3-6 branched alkyl, or C6-12 aryl. 
     
     
         3 . The phospine precursor according to  claim 1 , wherein R1 to R9 are each independently, methyl, ethyl, n-propyl, iso-propyl, n-butyl, tert-butyl, iso-butyl, or phenyl. 
     
     
         4 . The phospine precursor according to  claim 1 , wherein the compound of the Chemical Formula 1 is selected form the group consisting of the following Structural Formulas: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         5 . The phospine precursor according to  claim 1 , wherein the compound of the Chemical Formula 1 is represented by the following Chemical Formula 1-1: 
       
         
           
           
               
               
           
         
         in the Chemical Formula 1-1, 
         R 1 ′ to R 6 ′ are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl, provided that all R 1 ′ to R 6 ′ are not methyl. 
       
     
     
         6 . The phospine precursor according to  claim 1 , wherein the compound of the Chemical Formula 1 is represented by the following Chemical Formula 1-2: 
       
         
           
           
               
               
           
         
         in the Chemical Formula 1-2, 
         R 1 ″ to R 3 ″ are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl, provided that all R 1 ″ to R 3 ″ are not methyl. 
       
     
     
         7 . A method for preparing the phosphine precursor of  claim 1 , comprising the steps of:
 preparing a mixture of a primary or secondary phosphine compound, halogenated hydrocarbon, and tertiary amine; and   adding a silyl triflate compound to the mixture.   
     
     
         8 . The method for preparing the phosphine precursor according to  claim 7 , wherein the halogenated hydrocarbon is dichloromethane, and the tertiary amine is trimethylamine. 
     
     
         9 . A method for preparing the phosphine precursor of  claim 1 , comprising the steps of:
 preparing a mixture of a primary or secondary phosphine compound, an ether solvent, and alkyl lithium; and   adding a silyl halide compound to the mixture.   
     
     
         10 . The method for preparing a phosphine precursor according to  claim 9 , wherein the ether solvent is tetrahydrofuran, and the alkyl lithium is butyl lithium. 
     
     
         11 . A precursor composition for the preparation of a quantum dot, comprising the phosphine precursor of  claim 1 . 
     
     
         12 . The precursor composition for the preparation of a quantum dot according to  claim 11 , further comprising tris(trimethylsilyl)phosphine. 
     
     
         13 . A quantum dot prepared from the phosphine precursor of  claim 1 . 
     
     
         14 . The quantum dot according to  claim 13 , wherein the quantum dot comprises InP as a core. 
     
     
         15 . A method for preparing a quantum dot using one or more phosphine precursors of  claim 1 . 
     
     
         16 . The method for preparing a quantum dot according to  claim 15 , wherein the method comprises the steps of:
 heating a mixture of an indium precursor, a zinc precursor, myristic acid and 1-octadecene;   cooling the mixture to room temperature;   introducing one or more of the phosphine precursors, a gallium precursor, and 1-octadecene into the cooled mixture, and heating and reacting; and   introducing dodecanethiol into the reactant, and cooling.   
     
     
         17 . The method for preparing a quantum dot according to  claim 16 , wherein the one or more of the phosphine precursors are additionally mixed with tris(trimethylsilyl)phosphine.