Disclosed is an optoelectronic device including at least one optoelectronic active region comprising at least a rear electrode and a front electrode between which an organic optoelectronic material is sandwiched, said rear electrode being reflective, and a cover layer arranged in front of said front electrode. The cover layer is formed from a material with light-scattering particles of a first material dispersed in a transparent matrix of at an least partly hydrolyzed silica sol. Due to the highly scattering properties of the cover layer, the device is essentially concealed behind the cover layer when not in its operative state.