Patent ID: 6337536
Filing Date: 2002-01-08
Classification: H01L

Abstract:
A white color LED comprising:an n-type ZnSe single crystal substrate doped with iodine (I), bromine (Br), chlorine (Cl), gallium (Ga), indium (In) or aluminum (Al) which acts both as an n-type dopant and as a self-activated (SA) emission center which absorbs blue or bluegreen light and makes yellow or orange light; and an epitaxial film structure epitaxially grown on the ZnSe substrate, the epitaxial film structure having a pn-junction and an active layer made of a ZnSe crystal or a ZnSe-related compound crystal for emitting blue light or bluegreen light; wherein the ZnSe substrate produces and emits white light by mixing the light from the epitaxial film structure with the light from the SA-emission centers.