Micro light-emitting diode displays having colloidal or graded index quantum dot films

A micro light emitting diode pixel structure, comprising:

• a substrate having a plurality of conductive interconnect structures in a first dielectric layer thereon;
• a plurality of micro light emitting diode devices in a second dielectric layer above the first dielectric layer, individual ones of the plurality of micro light emitting diode devices electrically coupled to a corresponding one of the plurality of conductive interconnect structures, wherein the second dielectric layer is separate and distinct from the first dielectric layer;
• a transparent conducting oxide layer on the plurality of micro light emitting diode devices and on the second dielectric layer;
• a material layer on the transparent conducting oxide layer, the material layer having a portion with a hydrophilic surface and a portion with a hydrophobic surface, the hydrophilic surface over one of the plurality of micro light emitting diode devices;
• and
• a color conversion device on the hydrophilic surface of the material layer and over the one of the plurality of micro light emitting diode devices.

A micro light emitting diode pixel structure, comprising:

• a plurality of micro light emitting diode devices in a dielectric layer;
• a transparent conducting oxide layer above the dielectric layer;
• a dielectric layer on the transparent conducting oxide layer, the dielectric layer having a microgroove therein, the microgroove over one of the plurality of micro light emitting diode devices;
• and
• a graded index quantum dot film in the microgroove and over the one of the plurality of micro light emitting diode devices.