White-light hyperbranched conjugated polymer, method for preparing the same and it's use

A white-light hyperbranched conjugated polymer, comprising a red phosphorescent Ir(III) complex as a core and two or more blue fluorescent materials as a framework, the white-light hyperbranched conjugated polymer having a structure formula represented by formula (I):

• wherein:
• M represents the red phosphorescent Ir(III) complex Ir(piq)3 or Ir(piq)2(pytzph),
• the Ir(piq)3 has a structure formula
• the Ir(piq)2(pytzph) has a structure formula
• F and C respectively represent two different blue fluorescent materials,
• E represents an end-capping group,
• x and y respectively represent a monomer number of the two different blue fluorescent materials,
• x equaling x1+x2+x3 is a positive integer,
• y equaling y1+y2+y3 is a natural number which is zero,
• the content of the red phosphorescent Ir(III) complex M in the hyperbranched polymer is in the range of 0.05 to 0.5 mol %;
• the weight-average molecular weight of the white light hyperbranched polymer is in the range of 10K to 150K;
• the number-average molecular weight of the white light hyperbranched polymer is in the range of 7K to 30K;
• the molecular weight distribution index of the white light hyperbranched polymer is more than 1 and no more than 6;
• the hyperbranched polymer has three branched chains;
• the glass transition temperature of the hyperbranched polymer is in the range of 120° C. to 200° C.;
• the blue fluorescent material F is a fluorene derivative monomer having a structure general formula (II):
• wherein:
• R1 and R2 independently are an alkyl group with the number of carbon atom selected in the range of 1 to 16;
• and R1 and R2 are same or different;
• and
• the blue fluorescent material C is a carbazole derivative having a structure general formula (III):
• wherein:
• R3 is an alkyl group with the number of carbon atom selected in the range of 2 to 16;