The present disclosure relates to a far ultraviolet light emitting device and a home appliance having the same. The present disclosure may include a first electrode part 130A and a second electrode part 130B spaced apart from the first electrode part 130A. A barrier may be arranged between the first electrode part 130A and the second electrode part 130B. An ultraviolet lamp 140 may have an electrode connection surface 141B arranged toward the surface of the first electrode part 130A, the surface of the second electrode part 130B, and the surface of the barrier 126, and a light extraction surface 141A arranged toward the opposite side of the electrode connection surface 141B. In this case, at least one of the surfaces of the first electrode part 130A or second electrode part 130B and the surface of the barrier 126 may be spaced apart from each other to form a gap part 136. The gap part 136 may be opened toward the electrode connection surface 141B.

A photoionization detector comprised of a gas discharge lamp that ionizes molecules of interest to create ionized molecules and electrons and a sensor having at least one opening for UV light to pass through and electrically conductive patterns on the top and bottom surfaces of the plate. A negative electrical potential pattern can be on one of the top or the bottom surface and can include an interior portion that is at least a first distance away from every edge of the at least one opening. An electron collecting electrode pattern can be on the other of the top or the bottom surface and can substantially fill an area surrounding the opening such that the negative electrical potential pattern and the electron collecting electrode pattern are offset relative to each other. The ionized molecules are collectable by a bias electrode and electrons are collectable by a collector electrode.

A photoionization detector sensor comprised of plate, at least one opening in the plate for UV light to pass through, and at least one electrically conductive pattern on at least one of the top and bottom surfaces of the plate. The at least one electrically conductive pattern can include a negative electrical potential pattern comprised of a first material. Further, the negative electrical potential pattern can have a void in its center, and the void can surround the at least one opening. The plate can be comprised of a second material that is different than the first material. The negative electrical potential pattern can be located on at least one of the top or the bottom surfaces, and the at least one electrically conductive pattern can further include an electron collecting electrode pattern on the other of top or bottom surface.