Device for emitting ultraviolet light

A device for emitting ultraviolet light, the device comprising:

• at least one excimer lamp, each of the at least one excimer lamp having a discharge vessel filled with light-emitting gases, and a pair of first and second electrodes that are placed in contact with the discharge vessel and produce a dielectric barrier discharge inside the discharge vessel;
• a light source unit including a housing, the housing configured to house the at least one excimer lamp, and having a light-emitting window that allows light with a center wavelength in a range from 200 nm to 230 nm emitted from the at least one excimer lamp to exit from the housing;
• a first connection terminal that extends through the housing and electronically connects the first electrode to a power supply unit, the power supply unit being disposed outside the housing to supply power to the at least one excimer lamp;
• and
• a second connection terminal that extends through the housing and electrically connects the second electrode to the power supply unit.