Quantum dot (QD) delivery method
View Patent ↗Quantum dot delivery methods are described. In a first example, a method of delivering or storing a plurality of nano-particles involves providing a plurality of nano-particles. The method also involves forming a dispersion of the plurality of nano-particles in a medium for delivery or storage, wherein the medium is free of organic solvent. In a second example, a method of delivering or storing a plurality of nano-particles involves providing a plurality of nano-particles in an organic solvent. The method also involves drying the plurality of nano-particles for delivery or storage, the drying removing entirely all of the organic solvent.
1. A method of delivering or storing a plurality of photo-luminescent quantum dots, the method comprising:
providing a plurality of photo-luminescent quantum dots in an organic solvent;
drying the plurality of photo-luminescent quantum dots to remove all of the organic solvent, wherein drying the plurality of photo-luminescent quantum dots comprises performing a lyophilisation; and
adding a base of potassium hydroxide (KOH) to the plurality of photo-luminescent quantum dots, after the drying of the plurality of photo-luminescent quantum dots, to increase a photoluminescent quantum yield (PLQY) of the plurality of photo-luminescent quantum dots.
2. A method for delivering or storing a plurality of photo-luminescent quantum dots, the method comprising:
providing a plurality of photo-luminescent quantum dots in an organic solvent;
drying the plurality of photo-luminescent quantum dots to remove entirely all of the organic solvent, using a rotary evaporator or a distillation apparatus to remove the organic solvent and then purging the dried photo-luminescent quantum dots with N 2 at a temperature between 60° C. and 150° C.; and
adding a base of potassium hydroxide (KOH) to the plurality of photo-luminescent quantum dots, after the drying of the plurality of photo-luminescent quantum dots, to increase a photoluminescent quantum yield (PLQY) of the plurality of photo-luminescent quantum dots.
3. The method of claim 1 , wherein the plurality of photo-luminescent quantum dots are inserted in vinyl-terminated poly(phenylmethylsiloxane) before KOH is added.
4. The method of claim 1 , wherein the plurality of photo-luminescent quantum dots are inserted in vinyl-terminated poly(phenylmethylsiloxane) after KOH is added.