Blue emitting semiconductor nanocrystals and compositions and devices including same
View Patent ↗A semiconductor nanocrystal capable of emitting blue light upon excitation. Also disclosed are devices, populations of semiconductor nanocrystals, and compositions including a semiconductor nanocrystal capable of emitting blue light upon excitation. In one embodiment, a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation. In another embodiment, a semiconductor nanocrystal includes 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 blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation. In a further embodiment, a semiconductor nanocrystal includes 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 including a maximum peak emission in the blue region of the spectrum upon excitation.
1. A composition comprising a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation, and a matrix in which the nanocrystal is dispersed, wherein the semiconductor nanocrystal comprises a core comprising a first semiconductor material and a shell disposed over at least a portion of a surface of the core, the shell comprising a second semiconductor material.
2. A composition in accordance with claim 1 wherein the first semiconductor material comprises at least three chemical elements and the second semiconductor material comprises at least three chemical elements.
3. A composition in accordance with claim 1 wherein the first semiconductor material comprises at least three chemical elements.
4. A composition in accordance with claim 1 wherein the matrix includes a polymer.
5. A composition in accordance with claim 1 wherein the matrix includes an oligomer.
6. A composition in accordance with claim 1 wherein the matrix comprises an organic material.
7. A composition in accordance with claim 1 wherein the matrix comprises an inorganic material.
8. 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.
9. 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.
10. A composition in accordance with claim 1 wherein the first semiconductor material comprises zinc, cadmium, and selenium and the second semiconductor material comprises zinc, cadmium, and sulfur.
11. A composition in accordance with claim 1 wherein the first semiconductor material comprises zinc, cadmium, and sulfur and the second semiconductor material comprises zinc and sulfur.
12. A composition comprising a semiconductor nanocrystal and a pre-polymer, wherein the semiconductor nanocrystal includes a core comprising a first semiconductor material and a shell disposed over at least a portion of the core, the shell comprising a second semiconductor material, and wherein the semiconductor nanocrystal is capable of emitting blue light with a photoluminescence quantum efficiency greater than about 65% upon excitation.
13. A composition in accordance with claim 12 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 90% upon excitation.
14. A composition in accordance with claim 12 wherein the first semiconductor material comprises zinc, cadmium, and selenium and the second semiconductor material comprises zinc, cadmium, and sulfur.
15. A composition in accordance with claim 12 wherein the first semiconductor material comprises zinc, cadmium, and sulfur and the second semiconductor material comprises zinc and sulfur.
16. A composition comprising a semiconductor nanocrystal capable of emitting blue light including a maximum peak emission at a wavelength not greater than about 470 nm with a photoluminescence quantum efficiency greater than about 65% upon excitation, and a polar liquid or non-polar liquid in which the semiconductor nanocrystal is dispersible, wherein the semiconductor nanocrystal comprises a core comprising a first semiconductor material and a shell disposed over at least a portion of a surface of the core, the shell comprising a second semiconductor material.
17. A composition in accordance with claim 16 wherein the semiconductor nanocrystal is capable of emitting light with a photoluminescence quantum efficiency greater than about 90% upon excitation.
18. A composition in accordance with claim 16 wherein the first semiconductor material comprises zinc, cadmium, and selenium and the second semiconductor material comprises zinc, cadmium, and sulfur.
19. A composition in accordance with claim 16 wherein the first semiconductor material comprises zinc, cadmium, and sulfur and the second semiconductor material comprises zinc and sulfur.