ORGANIC ELECTROLUMINESCENT DEVICE

摘要

An organic electroluminescent device (1) including: an anode (10) and a cathode (30), and an emitting layer (20) including an anode-side region (22), an internal region (24) and cathode-side region (26) provided between the anode (10) and the cathode (30); each of the regions (22), (24) and (26) including a host compound of an organic material and a dopant of a metal complex containing a heavy metal and exhibiting light emitting properties originated from a triplet state; the dopant concentration of the internal region (24) being higher than the dopant concentrations of the anode-side region (22) and the dopant concentration of the cathode-side region (24).