Disclosed is EL phosphor powder which contains phosphor particles that
comprise zinc sulfide as the matrix thereof and contain an activator and a co-activator,
wherein at least 30% of the number of the phosphor particles contained in the EL
phosphor powder are those having an aspect ratio (length of major axis/length of
minor axis) of at least 3. EL devices comprising the EL phosphor powder enable
bright light emission.
