Gas phase enhancement of emission color quality in solid state LEDs

摘要

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.

主权项

1. A composition comprising:
a light-emitting semiconductor material having pores therein, the pores comprising:
first pores having first pore diameters; andsecond pores having second pore diameters larger than the diameters of the first pores;first color-emitting quantum dots (QDs) disposed within the first pores and having diameters essentially equal to the first pore diameters; andsecond color-emitting QDs disposed within the second pores and having diameters essentially equal to the second pore diameters; whereinthe composition is free of solvent.