Quantum Dots Tailored with Electronically-Active Polymers

Abstract

Cadmium selenide, and other quantum dot materials, can be integrated into thin films of poly(para-phenylene vinylene) (PPV) or other polymer compounds without aggregation of the nanocrystals. Solid-state photoluminescence spectra of composite materials prepared by these novel techniques reveal the effect of this greatly enhanced quantum dot-polymer interface relative to cases where the nanoparticles are aggregated, such that electronic communication and energy transfer between the nanoparticle and polymer components is made more efficient.

1 . A phosphine oxide ligand compound of a formula 
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are independently selected from H, alkyl, substituted alkyl, alkoxy and substituted alkoxy moieties, and R 3  is selected from vinyl-substituted phenyl, vinyl-substituted benzyl, and vinyl-substituted phenylallyl moieties, with said R 3  alkyl ranging from C 2  to about C 10 . 
       
     
     
         2 . The ligand compound of  claim 1  wherein R 1  and R 2  are independently selected from linear alkyl and alkoxy moieties ranging from about C 1  to about C 14 . 
     
     
         3 . The ligand compound of  claim 2  wherein R 3  is selected from said substituted phenylalkyl and substituted benzyl moieties. 
     
     
         4 . The compound of  claim 3  of a formula 
       
         
           
           
               
               
           
         
         where m is an integer ranging from 1 to about 14; and X is a vinyl substituent. 
       
     
     
         5 . The ligand compound of  claim 4  wherein R 1  and R 2  are independently selected from alkyl and alkoxy moieties ranging from about C 3  to about C 12 . 
     
     
         6 . The ligand compound of  claim 3  coordinated with an emissive particulate, to provide a ligand-particulate composite.