devices emitting ultraviolet (UV) light; devices emitting ultraviolet (UV) light for disinfecting; devices emitting ultraviolet (UV) light for sensing applications; devices emitting ultraviolet (UV) light for use in direct photolysis or photo-chemical degradation of contaminants; semiconductor chips; semiconductor chips that generate ultraviolet (UV) light; semiconductor chips that generate ultraviolet (UV) light for disinfecting; semiconductor chips that generate ultraviolet (UV) light for s...