Abstract: A light-emitting device and method of producing a white appearance for a light-emitting device in an off-state are disclosed. The device includes a supporting member, an organic light emitting diode (OLED) disposed on the supporting member and a color conversion layer disposed on the OLED. The color conversion layer comprises phosphor and has a non-white appearance under ambient light when the device is in an off-state. The device further includes one or more whitening layers that have a plurality of whitening particles configured to reduce the absorption of ambient light by the color conversion layer and produce a white appearance for the device in the off-state under ambient light.

Abstract: A composite layered structure and light-emitting device using the composite layered structure is disclosed. The camposite layered structure includes a substrate and one or more layers of phosphor film disposed on the substrate. The phosphor film includes a resin material and a phosphor material wherein the phosphor material comprises phosphor microparticles sized from 1 ?m to 10 ?m and phosphor nanoparticles sized from 10 nm to 900 nm.