Blue color converter for micro leds

A photocured composition comprising:

• a polymer matrix;
• a blue photoluminescent material mixed in the polymer matrix, the blue photoluminescent material selected to absorb ultraviolet light with a maximum wavelength in a range of about 300 nm to about 430 nm and to emit blue light with an emission peak in a range of about 420 nm to about 480 nm, wherein the full width at half maximum of the emission peak is less than 100 nm, and the photoluminescence quantum yield is in a range of 5% to 100%;
• one or more monomers;
• and
• components of a photoinitiator that initiated polymerization to form the polymer matrix.

A method of fabricating a light emitting device, comprising, comprising:

• dispensing a first photo-curable fluid over a display having a backplane and an array of ultraviolet light emitting diodes electrically integrated with backplane circuitry of the backplane, the first photo-curable fluid including
• a blue photoluminescent material selected to absorb ultraviolet light with a maximum wavelength in a range of about 300 nm to about 430 nm and to emit blue light with an emission peak in a range of about 420 nm to about 480 nm, wherein the full width at half maximum of the emission peak is less than 100 nm, and the photoluminescence quantum yield is in a range of 5% to 100%,
• one or more monomers, and
• a photoinitiator that initiates polymerization of the one or more monomers in response to absorption of the ultraviolet light;
• activating a first plurality of light emitting diodes in the array of light emitting diodes to illuminate and polymerize the one or more monomers to form a first color conversion layer over each of the first plurality of light emitting diodes to convert light from the first plurality of light emitting diodes to blue light, each color conversion layer including the blue photoluminescent material mixed in a polymer matrix;
• and
• removing an uncured remainder of the first photo-curable fluid.