SEMICONDUCTOR NANOCRYSTALS WITH SURFACE CHARGE AND OPTOELECTRIC DEVICES COMPRISING THE SAME

摘要

PURPOSE: A semiconductor nanocrystal in which electric charge is introduced on the surface and an optical device including the same are provided to be applied to all kinds of optical devices including an electro-optic modulator by showing reversible change of an emitting wavelength and high photon luminous efficiency when an electric field is applied. CONSTITUTION: A semiconductor nanocrystal in which electric charge is introduced on the surface is a multi-layered semiconductor nanocrystal including two or more semiconductor layers. The semiconductor nanocrystal has one or more interfaces in which a band-gap crosses and the electric charge is introduced on the surface of the semiconductor nanocrystal. A conduction band of a first semiconductor layer(10) is higher than the conduction band of a second semiconductor layer(20). A valence band of the first semiconductor layer is higher than the valence band of the second semiconductor layer.