Light emitting material
A composition can include a first moiety capable of being excited to an excited state, and a second moiety capable of accepting excited state energy from the first moiety. The second moiety is capable of emitting light with a FWHM of 15 nm or less when excited. The second moiety can be a J-aggregate and the first moiety can be a semiconductor nanocrystal.
1. A composition comprising:
a first moiety capable of absorbing a first wavelength of light and emitting a second wavelength of light; and
a second moiety capable of absorbing a third wavelength of light and emitting a fourth wavelength of light;
wherein the first and second moieties are associated electrostatically, wherein the second moiety includes a J-aggregate or is capable of emitting light with a FWHM of 15 nm or less when excited.
2. The composition of claim 1 , wherein the second moiety is capable of absorbing the second wavelength of light.
3. The composition of claim 1 , wherein the first moiety is capable of absorbing the fourth wavelength of light.
4. The composition of claim 1 , wherein the first moiety is a semiconductor nanocrystal.
5. The composition of claim 4 , wherein the second moiety is a J-aggregate.
6. A composition comprising:
a first moiety capable of being excited to an excited state; and
a second moiety capable of accepting excited state energy from the first moiety;
wherein the second moiety is capable of emitting light with a FWHM of 15 nm or less when excited.
7. The composition of claim 6 , wherein the first and second moieties are associated electrostatically.
8. The composition of claim 6 , wherein the second moiety is a J-aggregate.
9. The composition of claim 8 , wherein the first moiety is a semiconductor nanocrystal.
10. The composition of claim 9 , wherein the semiconductor nanocrystal includes an outer layer including a compound having a functional group capable of bearing an electrostatic charge.
11. The composition of claim 10 , wherein the compound also includes a functional group having an affinity for a surface of the semiconductor nanocrystal.
12. A method of making a composition, comprising:
contacting a first moiety capable of being excited to an excited state bearing a first electrostatic charge with a second moiety capable of accepting excited state energy from the first moiety and bearing an opposite electrostatic charge; wherein the second moiety is capable of emitting light with a FWHM of 15 nm or less when excited.
13. The method of claim 12 , wherein the second moiety is a J-aggregate.
14. The method of claim 13 , wherein the first moiety is a semiconductor nanocrystal.
15. The method of claim 14 , wherein the semiconductor nanocrystal includes an outer layer including a compound having a functional group capable of bearing an electrostatic charge.
16. The method of claim 15 , wherein the compound also includes a functional group having an affinity for a surface of the semiconductor nanocrystal.
17. A method of generating light of a predetermined wavelength, comprising:
exciting a composition including
a first moiety capable of being excited to an excited state; and
a second moiety capable of accepting excited state energy from the first moiety;
wherein the second moiety is capable of emitting light with a FWHM of 15 nm or less when excited.
18. The method of claim 17 , wherein the first and second moieties are associated electrostatically.
19. The method of claim 17 , wherein the second moiety is a J-aggregate.
20. The method of claim 19 , wherein the first moiety is a semiconductor nanocrystal.
21. The method of claim 20 , wherein the semiconductor nanocrystal includes an outer layer including a compound having a functional group capable of bearing an electrostatic charge.
22. The method of claim 21 , wherein the compound also includes a functional group having an affinity for a surface of the semiconductor nanocrystal.
23. The method of claim 17 , wherein exciting includes illuminating the composition with an excitation wavelength of light.
24. The method of claim 17 , wherein exciting includes electrically exciting the composition.