Ultra-thin phosphor layers partially filled with si-based binders
AssigneeLumileds LLC
InventorsJoerg FELDMANN, Marcel Rene BOHMER, Marcel van-Gerwen, Yu-Chen SHEN
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Abstract
A light emitting device and method of forming a light emitting device are disclosed. The light emitting device includes a light emitting diode and a phosphor layer formed on the light emitting diode, the phosphor layer including a plurality of phosphor particles formed in a particle layer, the particle layer including interstices between the phosphor particles, and a matrix material disposed in a portion of the interstices. A plurality of cavities may be disposed in a remaining portion of the interstices.
Claims20
A light emitting device comprising:
- a light emitting diode;
- and
- a phosphor layer formed on the light emitting diode, the phosphor layer including:
- a plurality of phosphor particles formed in a particle layer, the particle layer including interstices between the phosphor particles;
- and
- a matrix material disposed in a portion of the interstices.
A light emitting device comprising:
- a light emitting diode;
- a phosphor layer disposed on the light emitting diode, the phosphor layer comprising:
- a plurality of phosphor particles disposed in a particle layer, the particle layer comprising interstices between the phosphor particles;
- and
- a matrix disposed in the interstices, the matrix comprising a matrix material and a plurality of cavities interspersed in the matrix material.
A method of forming a phosphor layer on a light emitting diode comprising
- depositing a thin layer of a formulation on a surface of the light emitting diode, the formulation comprising phosphor particles, a matrix precursor material, and a solvent;
- curing the thin layer to remove the solvent and convert the matrix precursor material into a matrix, a plurality of particles in a particle layer being disposed within the matrix, the matrix including cavities formed within interstices between phosphor particles.
Dependencies are inferred from the claim text.