Quantum dots and electroluminescent devices

Abstract

The present application relates to a quantum dot and an electroluminescent device. The quantum dot includes a core, at least one set of inner shell layer units sequentially coated on the surface of the core, and an outer shell layer; each set of inner shell layer units includes a first inner shell layer and a second inner shell layer; the band gap of the first inner shell layer is greater than the band gap of the core and the band gap of the second inner shell layer; the band gap of the outer shell layer is greater than or equal to the band gap of the first inner shell layer. Through the design of the size and core-shell structure of the quantum dot, the present application achieves that the photoluminescence properties of the quantum dot are more resistant to the destructive effects of accumulated charges.

Dependencies are inferred from the claim text.