Light emitting device including semiconductor nanocrystals
A light emitting device includes a semiconductor nanocrystal and a charge transporting layer that includes an inorganic material. The charge transporting layer can be a hole or electron transporting layer. The inorganic material can be an inorganic semiconductor.
1. A light emitting device comprising:
a first electrode,
a first charge transporting layer including a first inorganic material on the first electrode,
a emissive layer comprising an emissive material including a plurality of colloidally-grown semiconductor nanocrystals on the first charge transporting layer,
a second charge transporting layer including a second inorganic material on the emissive layer, wherein the second inorganic material has a band gap greater than an emission energy of the emissive material; and
a second electrode on the second charge transporting layer.
2. The light emitting device of claim 1 , wherein the first inorganic material includes a metal chalcogenide.
3. The light emitting device of claim 2 , wherein the metal chalcogenide includes a zinc oxide, a titanium oxide, a niobium oxide, a zinc sulfide, an indium tin oxide, or a mixture thereof.
4. The light emitting device of claim 1 , wherein the first charge transporting layer is a hole transporting layer.
5. The light emitting device of claim 1 , wherein the second charge transporting layer is an electron transporting layer.