Omnidirectional high chroma red structural color with combination of semiconductor absorber layer and dielectric absorber layer

摘要

The invention provides an omnidirectional high chroma red structural color with combination of semiconductor absorber and dielectric absorber layers. The invention provides the high-chroma omnidirectional red structural color pigment. The omnidirectional structural color pigment is in the form of a multilayer stack that has a reflective core layer, a semiconductor absorber layer extending across the reflective core layer, a dielectric absorber layer extending across the semiconductor absorber layer and a high index of refraction dielectric layer extending across the dielectric absorber layer. The multilayer stack reflects a single band of visible light with a hue between 0-40 DEG, and preferably between 10-30 DEG, on an a*b* Lab color map. The single band of visible light has a hue shift of less than 30 DEG on the a*b* Lab color map when viewed from all angles between 0-45 DEG normal to an outer surface of the multilayer stack.