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The light-emitting layer contains a light-emitting base including a chalcogenide compound, and a light-emitting center including two kinds of halogen compounds. The chalcogenide compound contains a chalcogen element and an element selected from elements belonging to Group 2 to Group 13 of the periodic table, and the halogen compound contains a halogen element and an element selected from typical metal elements, transition metal elements, or rare earth elements.