White organic electroluminescent element and lighting device

A white organic electroluminescent element comprising:

• light emitting layers between an anode and a cathode,
• wherein the light emitting layers include:
• a light emitting layer A which contains a host compound and a phosphorescence emitting dopant exhibiting a maximum emission wavelength of 480 nm or less;
• and
• a light emitting layer B which contains a phosphorescence emitting dopant exhibiting a maximum emission wavelength of 510 nm or more,
• provided that the light emitting layer B is located between the light emitting layer A and the anode;
• and
• a concentration of the phosphorescence emitting dopant in the light emitting layer A changes in a thickness direction of the light emitting layer A,
• wherein the concentration of the phosphorescence emitting dopant contained in the light emitting layer A is decreased from a side of the anode to a side of the cathode in a thickness direction of the light emitting layer A;
• wherein the phosphorescence emitting dopant contained in the light emitting layer A has at least one of partial structures represented by Formulas (A) or (B):
• wherein
• Ra represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group;
• Rb and Rc each represent a hydrogen atom or a substituent;
• Al represents a group of atoms necessary to form an aromatic ring or an aromatic heterocyclic ring;
• and
• M represents Ir or Pt,
• wherein
• Ra represents a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group;
• Rb, Rc, Rb1 and Rc1 each represent a hydrogen atom or a substituent;
• Al represents a group of atoms necessary to form an aromatic ring or an aromatic heterocyclic ring;
• and
• M represents Ir or Pt;
• and
• the host compound contained in the light emitting layer A is represented by Formula (a):
• wherein
• X represents O;
• Ar represents an aromatic ring;
• and
• n is an integer of 0 to 8.