Semiconductor nanocrystals and compositions and devices including same
View Patent ↗A composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%. Also disclosed is a composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation.
1. A composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of a surface of the core, the shell comprising a second semiconductor material, wherein the semiconductor nanocrystal is capable of emitting light upon excitation with a photoluminescence quantum efficiency greater than about 65%.
2. A composition comprising a semiconductor nanocrystal including a core comprising a first semiconductor material comprising at least three chemical elements and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material comprising at least three chemical elements, wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 60% upon excitation.
3. A composition in accordance with claim 1 wherein the composition further includes a polymer.
4. A composition in accordance with claim 1 wherein the composition further includes a pre-polymer.
5. A composition in accordance with claim 1 wherein the composition further includes an oligomer.
6. A composition in accordance with claim 1 wherein the composition further includes a small molecule.
7. A composition in accordance with claim 1 wherein the composition further includes an inorganic material.
8. A composition in accordance with claim 1 wherein the composition comprises a matrix.
9. A composition in accordance with claim 1 wherein the composition comprises a matrix in which the semiconductor nanocrystals are dispersed.
10. A composition in accordance with claim 8 wherein the matrix comprises an organic material.
11. A composition in accordance with claim 8 wherein the matrix comprises an inorganic material.
12. A composition in accordance with claim 1 wherein the composition further includes a non-polar liquid in which the semiconductor nanocrystal is dispersible.
13. A composition in accordance with claim 1 wherein the composition further includes a polar liquid in which the semiconductor nanocrystal is dispersible.
14. A composition in accordance with claim 1 wherein the first semiconductor material comprises Zn x Cd 1-x S, wherein 0<x<1.
15. A composition in accordance with claim 1 wherein the second semiconductor material comprises ZnS.
16. A composition in accordance with claim 1 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 70% upon excitation.
17. A composition in accordance with claim 1 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 80% upon excitation.
18. A composition in accordance with claim 1 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 90% upon excitation.
19. A composition in accordance with claim 1 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 95% upon excitation.
20. A composition in accordance with claim 1 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency of about 100% upon excitation.