Abstract: The present application discloses a light emitting diode die with at least one phosphor layer, comprising a substrate having a first surface and a second surface opposing to the first surface; a light-emitting structure being formed on the first surface and emitting a primary light with a specific wavelength while being driven by a voltage wherein the primary light is capable of passing through the substrate; and, at least one phosphor layer with plate-shaped structure formed on the second surface, wherein at least one phosphor layer comprises at least one type of organic material and at least one type of phosphor substance that absorbs and converts part of the primary light to thereby emit at least a secondary light with a different wavelength from the specific wavelength. In addition, the present invention discloses methods for forming a light emitting diode die with at least one phosphor layer.