![core shell quantum dot core shell quantum dot](https://www.frontiersin.org/files/Articles/455944/fchem-07-00466-HTML/image_m/fchem-07-00466-g001.jpg)
11, 2019, and all the benefits accruing therefrom under 35 U.S.C. 10-2019-0004231 filed in the Korean Intellectual Property Office on Jan. This application claims priority to Korean Patent Application No. The electroluminescent device of claim 18, wherein the electroluminescent device emits light having a maximum luminance of greater than or equal to about 5,000 candela per square meter. The electroluminescent device of claim 18, wherein the electroluminescent device has peak external quantum efficiency of greater than or equal to about 4 percent.Ģ2. The electroluminescent device of claim 19, wherein the charge auxiliary layer comprises a charge transport layer, a charge injection layer, or a combination thereof.Ģ1. The electroluminescent device of claim 18, wherein a charge auxiliary layer is included between the first electrode and the quantum dot emission layer, between the second electrode and the quantum dot emission layer, or between the first electrode and the quantum dot emission layer and between the second electrode and the quantum dot emission layer.Ģ0. An electroluminescent device, comprising a first electrode and a second electrode facing each other and a quantum dot emission layer disposed between the first electrode and the second electrode and comprising a plurality of quantum dots, wherein the plurality of quantum dots comprise the quantum dot of claim 1.ġ9. The quantum dot of claim 1, wherein a valence band edge and a conduction band edge of the core are in the bandgap of the semiconductor nanocrystal shell.ġ8. The quantum dot of claim 1, wherein the quantum dot has quantum efficiency of greater than or equal to about 60 percent.ġ7. The quantum dot of claim 1, wherein the quantum dot constitutes a population having a standard deviation of a particle size distribution of less than or equal to about 10 percent.ġ6. The quantum dot of claim 1, wherein the quantum dot has an average particle size of greater than or equal to about 10 nanometers.ġ5. The quantum dot of claim 1, wherein the quantum dot has an average particle size of greater than or equal to about 6 nanometers.ġ4. The quantum dot of claim 11, wherein the second layer is an outermost layer, and the third semiconductor nanocrystal does not comprise selenium.ġ3. The quantum dot of claim 10, wherein the second semiconductor nanocrystal comprises zinc, selenium, and optionally sulfur, and the third semiconductor nanocrystal comprises zinc and sulfur.ġ2. The quantum dot of claim 1, wherein the semiconductor nanocrystal shell comprises a first layer disposed directly on the core and a second layer disposed on the first layer, wherein the first layer comprises a second semiconductor nanocrystal and the second layer comprises a third semiconductor nanocrystal having a different composition from the second semiconductor nanocrystal.ġ1. The quantum dot of claim 8, wherein a concentration of the sulfur in the semiconductor nanocrystal shell increases toward the surface of the quantum dot.ġ0. The quantum dot of claim 1, wherein the semiconductor nanocrystal shell has a composition that varies in a radial direction.ĩ. The quantum dot of claim 1, wherein the core comprises ZnTe xSe 1-x, wherein, x is greater than or equal to about 0.1 and less than or equal to about 0.5.Ĩ. The quantum dot of claim 1, wherein the quantum dot has a mole ratio of zinc relative to a sum of sulfur and selenium of less than or equal to about 1.1:1.ħ. The quantum dot of claim 1, wherein the quantum dot has a mole ratio of a sum of sulfur and selenium relative to tellurium of greater than or equal to about 15:1.Ħ. The quantum dot of claim 1, wherein the quantum dot has a mole ratio S:Se of sulfur relative to selenium of greater than or equal to about 0.5:1 and less than or equal to about 2.0:1.ĥ. The quantum dot of claim 1, wherein in the quantum dot, the mole ratio Te:Se of tellurium relative to selenium is greater than or equal to about 0.055:1.Ĥ. The quantum dot of claim 1, wherein the green light has a maximum peak wavelength of greater than or equal to about 500 nanometers and less than or equal to about 550 nanometers.ģ. A quantum dot comprising a core comprising a first semiconductor nanocrystal comprising zinc, selenium, and tellurium, and a semiconductor nanocrystal shell disposed on a surface of the core, the shell comprising zinc, selenium, and sulfur, wherein the quantum dot is configured to emit green light, the quantum dot does not comprise cadmium, and the quantum dot has a mole ratio -Te:Se of tellurium relative to selenium of greater than about 0.05:1 and less than or equal to about 0.5:1.Ģ.