Patent ID: 8361823

Claim:
A method of making an inorganic light emitting layer comprising: (a) combining a solvent for conductive semiconductor nanoparticle growth, a solution of core/shell semiconductor quantum dots, and semiconductor nanoparticle precursor(s), selected to provide a conductive path for electrons and holes through the conductive semiconductor nanoparticles and into the core/shell quantum dots; (b) growing conductive semiconductor nanoparticles to form a crude solution of core/shell semiconductor quantum dots, conductive semiconductor nanoparticles, and conductive semiconductor nanoparticles that are connected to the core/shell semiconductor quantum dots; (c) forming a single colloidal dispersion of core/shell semiconductor quantum dots, conductive semiconductor nanoparticles, and conductive semiconductor nanoparticles that are connected to the core/shell semiconductor quantum dots; (d) depositing the colloidal dispersion to form a film; and (e) annealing the film to form the inorganic light emitting layer that provides a conductive path for electrons and holes from the edges of the inorganic light emitting layer, through the conductive semiconductor nanoparticles and into the core/shell quantum dots.