Patent ID: 8889457

Claim:
A method of applying a light-conversion layer to a surface of a light-emitting diode (LED), the method comprising: forming a polymer matrix from a mixture of quantum dots and discrete prepolymer molecules, wherein the quantum dots are hetero-structure quantum dots having an outer insulator coating, and wherein the quantum dots each comprise a nano-crystalline core comprising a first semiconductor material, a nano-crystalline shell comprising a second, different, semiconductor material at least partially surrounding the nano-crystalline core, a nano-crystalline outer shell at least partially surrounding the nano-crystalline shell, the nano-crystalline outer shell comprising a third semiconductor material different from the first and second semiconductor materials, and a compositional transition layer disposed between, and in contact with, the nano-crystalline shell and the nano-crystalline outer shell, the compositional transition layer having a composition intermediate to the second and third semiconductor materials, the polymer matrix comprising a dispersion of the quantum dots therein; and applying the polymer matrix to the surface of the LED.