Stratified quantum dot phosphor structure
First Claim
1. A light emitting diode (LED) display comprising:
- a substrate with a plurality of wells formed in a top surface of the substrate;
a plurality of LEDs, each LED occupying a corresponding well and having an exposed light emission surface, with a post extending from the light emission surface;
a plurality of stratified quantum dot (QD) structures, each stratified QD structure overlying a corresponding LED and comprising;
a transparent first barrier layer overlying the LED emission surface and post;
a first layer of discrete QDs overlying the first barrier layer; and
,a transparent second barrier layer overlying the first layer of QDs.
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Abstract
A method is presented for fabricating a light emitting diode (LED) device with a stratified quantum dot (QD) structure. The method provides an LED and a stratified QD structure is formed as follows. A first liquid precursor is deposited overlying the LED emission surface to form a transparent first barrier layer. A second liquid precursor is deposited overlying the first barrier layer to form a first layer of discrete QDs. A third liquid precursor is deposited overlying the first layer of QDs to form a transparent second barrier layer. Subsequent to each barrier layer liquid precursor deposition, an annealing is performed to cure the deposited precursor. The first and second barrier layers act to encapsulate the first layer of QDs. The LED emits a first wavelength of light, and the first layer of QDs converts the first wavelength of light to a first color of light in the visible spectrum.
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Citations
17 Claims
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1. A light emitting diode (LED) display comprising:
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a substrate with a plurality of wells formed in a top surface of the substrate; a plurality of LEDs, each LED occupying a corresponding well and having an exposed light emission surface, with a post extending from the light emission surface; a plurality of stratified quantum dot (QD) structures, each stratified QD structure overlying a corresponding LED and comprising; a transparent first barrier layer overlying the LED emission surface and post; a first layer of discrete QDs overlying the first barrier layer; and
,a transparent second barrier layer overlying the first layer of QDs. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for fabricating a light emitting diode (LED) device with a stratified quantum dot (QD) structure, the method comprising:
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providing a substrate with a plurality of wells formed in a top surface of the substrate; providing a plurality of LEDs, each LED having a light emission surface and a post extending from the light emission surface, and each LED occupying a corresponding well with the light emission surface and post exposed; forming a plurality of stratified QD structures, with each stratified QD structure overlying a corresponding LED, as follows; depositing a first liquid precursor overlying the LED emission surface and post to form a transparent first barrier layer; depositing a second liquid precursor overlying the first barrier layer to form a first layer of discrete QDs; and
,depositing a third liquid precursor overlying the first layer of QDs to form a transparent second barrier layer. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification