Quantum dot (QD) polymer composites for on-chip light emitting diode (LED) applications
View Patent ↗Quantum dot polymer composites for on-chip light emitting diode applications are described. In an example, a composite for on-chip light emitting diode application includes a polymer matrix, a plurality of quantum dots dispersed in the polymer matrix, and a base dispersed in the polymer matrix.
1. A composite for on-chip light emitting diode application, the composite comprising:
a polymer matrix;
a plurality of quantum dots dispersed in the polymer matrix; and
a base chemical compound dispersed in the polymer matrix, wherein the base chemical compound is selected from a group of base chemical compounds consisting of lithium hydroxide (LiOH), potassium hydroxide (KOH), sodium hydroxide (NaOH), rubidium hydroxide (RbOH), cesium hydroxide (CsOH), magnesium hydroxide (Mg(OH) 2 ), calcium hydroxide (Ca(OH) 2 ) strontium hydroxide (Sr(OH) 2 ), barium hydroxide (Ba(OH) 2 ), tetramethylammonium hydroxide ((Me) 4 NOH), tetraethylammonium hydroxide ((Et) 4 NOH), tetrabutylammonium hydroxide ((Bu) 4 NOH)), lithium diisopropyl amide (LDA), sodium bis(trimethylsilyl)amide (sodium HMDS), potassium bis(trimethylsilyl)amide (potassium HMDS), and combinations thereof.
2. The composite of claim 1 , wherein the polymer matrix comprises a silicone material.
3. The composite of claim 1 , wherein each of the plurality of quantum dots is immobilized and separated from one another within the polymer matrix.
4. The composite of claim 1 , wherein each of the plurality of quantum dots is coated with an insulator coating.
5. The composite of claim 1 , further comprising:
a plurality of light-scattering nanoparticles different from the plurality of quantum dots.
6. The composite of claim 5 , wherein the plurality of light-scattering nanoparticles comprises a material selected from the group consisting of silica and magnesium oxide.
7. The composite of claim 1 , further comprising:
fumed silica dispersed in the polymer matrix.
8. The composite of claim 1 , further comprising:
dioctyl sodium sulfuccinate dispersed in the polymer matrix.
9. A light emitting diode chip comprising a layer of the composite of claim 1 disposed thereon.
10. A composite for on-chip light emitting diode application, the composite comprising:
a polymer matrix;
a plurality of quantum dots dispersed in the polymer matrix;
a base chemical compound dispersed in the polymer matrix; and
dioctyl sodium sulfuccinate dispersed in the polymer matrix.