Patent ID: 7700200

Claim:
A light emitting device comprising: a first electrode; a hole transporting layer proximate to the first electrode; a second electrode opposed to the first electrode; an electron transporting layer between the hole transporting layer and the second electrode, wherein the second electrode is arranged to introduce electrons in the electron transporting layer; and a layer including a matrix and a plurality of semiconductor nanocrystals disposed between the first electrode and the second electrode, wherein the plurality of semiconductor nanocrystals is dispersed in the matrix and includes a substantially monodisperse population of semiconductor nanocrystals with an rms deviation in diameter of less than 15% and distinguishable from any other population of semiconductor nanocrystals based on emission characteristics; and wherein the layer including a plurality of semiconductor nanocrystals is distinct from the electron transporting layer, wherein each semiconductor nanocrystal includes a coordinating ligand on the surface of the semiconductor nanocrystal.