Gas Phase Enhancement of Emission Color Quality in Solid State LEDs
First Claim
1. A method for synthesizing quantum dots (QDs) in a light-emitting semiconductor material, the method comprising:
- flowing gaseous QD precursors through pores in a semiconductor material to effect reaction of the QD precursors in the absence of liquid solvent.
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Abstract
Light-emitting materials are made from a porous light-emitting semiconductor having quantum dots (QDs) disposed within the pores. According to some embodiments, the QDs have diameters that are essentially equal in size to the width of the pores. The QDs are formed in the pores by exposing the porous semiconductor to gaseous QD precursor compounds, which react within the pores to yield QDs. According to certain embodiments, the pore size limits the size of the QDs produced by the gas-phase reactions. The QDs absorb light emitted by the light-emitting semiconductor material and reemit light at a longer wavelength than the absorbed light, thereby “down-converting” light from the semiconductor material.
116 Citations
15 Claims
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1. A method for synthesizing quantum dots (QDs) in a light-emitting semiconductor material, the method comprising:
flowing gaseous QD precursors through pores in a semiconductor material to effect reaction of the QD precursors in the absence of liquid solvent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for synthesizing QDs in a light-emitting semiconductor material, the method comprising:
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flowing gaseous QD precursors through first pores in a semiconductor material to effect reaction of the QD precursors in the absence of liquid solvent; and flowing gaseous QD precursors through second pores in a semiconductor material to effect reaction of the QD precursors in the absence of liquid solvent; wherein the second pores have diameters larger than the diameters of the first pores. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification