Composite reflective structure and light-emitting diode chip and light-emitting diode device including the same

A composite reflective structure, comprising:

• at least one dielectric multilayer element which includes a first dielectric layer having a first refractive index, a second dielectric layer having a second refractive index, and a stress buffer layer interposed between said first dielectric layer and said second dielectric layer, said first refractive index being greater than said second refractive index,
• wherein said stress buffer laver includes at least two materials selected from the group consisting of titanium dioxide, tantalum pentoxide, aluminium oxide and niobium pentoxide.