Methods for Encapsulating Nanocrystals and Resulting Compositions

• US 20160009988A1
• Filed: 09/18/2015
• Published: 01/14/2016
• Est. Priority Date: 12/30/2008
• Status: Abandoned Application

• Current Assignee: Nanosys Incorporated (Shoei Electronic Materials, Inc.)
• Original Assignee: Nanosys Incorporated (Shoei Electronic Materials, Inc.)
• Inventors: DUBROW, Robert S.
• Application Number:
  US14/858,585
• Publication Number:
  US 20160009988A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/414 Translucent
• CPC Class Codes: B32B 2315/08 Glass
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 37/144 using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding constructional features for tensioning B32B38/1825
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/56 containing sulfur
• CPC Class Codes: C09K 11/565 with zinc cadmium
• CPC Class Codes: C09K 11/623 with zinc or cadmium
• CPC Class Codes: C09K 11/70 containing phosphorus
• CPC Class Codes: C09K 11/703 with zinc or cadmium
• CPC Class Codes: C09K 11/883 with zinc or cadmium
• CPC Class Codes: C23C 14/081 of aluminium, magnesium or beryllium
• CPC Class Codes: C23C 14/083 of refractory metals or yttrium
• CPC Class Codes: C23C 14/10 Glass or silica
• CPC Class Codes: C23C 16/40 Oxides
• CPC Class Codes: C23C 16/402 Silicon dioxide
• CPC Class Codes: C23C 16/403 of aluminium, magnesium or beryllium
• CPC Class Codes: C23C 16/405 of refractory metals or yttrium
• CPC Class Codes: C23C 16/45555 : applied in non-semiconductor technology
• CPC Class Codes: Y10T 156/10 : Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/24355 : Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/24562 : Interlaminar spaces
• CPC Class Codes: Y10T 428/24851 : Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/2991 : Coated

Abstract

The present invention provides methods for hermetically sealing luminescent nanocrystals, as well as compositions and containers comprising hermetically scaled luminescent nanocrystals. By hermetically sealing the luminescent nanocrystals, enhanced lifetime and luminescence can be achieved.

Claims

1. A composition comprising:

luminescent core-shell nanocrystals;

an inorganic layer covering each of the luminescent core-shell nanocrystals; and

a barrier layer, disposed on the inorganic layer, configured to hermetically seal the composition.

2. The composition of claim 1, wherein the luminescent core-shell nanocrystals are separated from each other by the inorganic layer.

3. The composition of claim 1, wherein the luminescent nanocrystals are selected from the group consisting of CdSe/ZnS, CdSe/CdS, and InP/ZnS.

4. The composition of claim 1, wherein the luminescent nanocrystals are between about 1-10 nm in size.

5. The composition of claim 1, wherein the inorganic layer comprises silicon.

6. The composition of claim 1, wherein the inorganic layer comprises silica or titania.

7. The composition of claim 1, wherein the barrier layer comprises SiO₂, TiO₂, or AlO₂.

8. A method comprising:

forming a composition comprising;

luminescent core-shell nanocrystals coated with an inorganic layer, and

an inorganic layer covering each of the luminescent core-shell nanocrystals; and

disposing a barrier layer on the inorganic layer to hermetically seal the composition.

9. The method of claim 8, wherein the luminescent core-shell nanocrystals are separated from each other by the inorganic layer.

10. The method of claim 8, wherein the luminescent nanocrystals are selected from the group consisting of CdSe/ZnS, CdSe/CdS, and InP/ZnS.

11. The method of claim 8, wherein the luminescent nanocrystals are between about 1-10 nm in size.

12. The method of claim 8, wherein the inorganic layer comprises silicon.

13. The method of claim 8, wherein the inorganic layer comprises silica or titanic.

14. The method of claim 8, wherein the barrier layer comprises SiO₂, TiO₂, or AlO₂.