The present invention relates to a thin film light emitting element which
has low drive voltage. In particular, the present invention relates to a
thin film light emitting element which has low drive voltage and in which
color purity and luminous efficiency are not deteriorated. A structure of
a light emitting element of the present invention comprises at least an
electron transporting layer, a light emitting layer containing a
luminescent substance, a first region, and a second region are provided
between electrodes, wherein the electron transporting layer includes the
second region between the light emitting layer and the first region, the
first region includes a substance containing a polycyclic condensed ring,
and the second region does not include the substance containing a
polycyclic condensed ring.