Patent ID: 8648357

Claim:
A radiation-emitting device comprising: a first active semiconductor layer embodied for the emission of electromagnetic radiation of a first wavelength and for direct contact with connection electrodes; a second active semiconductor layer embodied for the emission of electromagnetic radiation of a second wavelength, which is different from the first wavelength, and for direct contact with connection electrodes, wherein the first active semiconductor layer and the second active semiconductor layer are arranged in a manner stacked one above another, wherein the first and second semiconductor layers are made of InAlGaAs, InGaAlP or InGaAlN, including the respective binary and ternary compounds, and wherein a material of the first semiconductor layer is different from a material of the second semiconductor layer, and wherein the first active semiconductor layer and the second active semiconductor layer are embodied as individual, separate semiconductor chips; and a first reflection layer arranged between the first active semiconductor layer and second active semiconductor layer, wherein the first reflection layer comprises indium-tin oxide, cadmium oxide, titanium oxide, ZnO, SnO 2 , In 2 O 3 , Zn 2 SnO 4 , CdSnO 3 , ZnSnO 3 , MgIn 2 O 4 , GaInO 3 , Zn 7 In 2 O 5 , or mixtures thereof, wherein a jump in refractive index between the first and second active semiconductor layers and a region surrounding thereof is divided into two smaller jumps in refractive index by the first reflection layer, wherein the first active semiconductor layer has a radiation coupling-out area and a second reflection layer arranged on a side of the first active semiconductor layer that is remote from the radiation coupling-out area, wherein the radiation coupling-out area is a main side of the first active semiconductor layer and faces the second active semiconductor layer, and wherein the second reflection layer is embodied as a metallic or dielectric reflection layer.