Patent ID: 7964278

Claim:
A core/multishell semiconductor nanocrystal, comprising: a core material comprising a III/V compound; and at least two shell materials, comprising a first shell material that coats the core material, a second shell material that coats the first shell material, and sequentially each subsequent shell material coats a preceding shell, each shell material independently comprising a compound selected from a II/VI, a III/V or a III/VI compound, the core material being different from the first shell material, and any shell material is different from a shell material of an adjacent shell, wherein the nanocrystal exhibits a typed band offset and luminescence at a wavelength from about 400 to about 1600 nm, and wherein a band gap of the core material is less than a band gap of the first, second and any subsequent shell materials, the band gap of the first shell material is larger than the band gap of the core material and lower than the band gap of subsequent shell materials, and the band gap of the second or any subsequent shell material is larger than that of the first or preceding shell material and lower than the band gap of any subsequent shell materials.