High voidage phosphor layer and vacuum UV excited light emitting element

A phosphor layer having a high luminance, and a vacuum ultra-violet radiation excited light emitting element are provided. A phosphor layer having a voidage of not less than 60 vol %, the phosphor layer in which a phosphor having a BET specific surface area of not less than 3 m²/g is used, and a vacuum ultra-violet radiation excited light emitting element are provided.