Patent ID: 8502202

Claim:
A light-emitting element comprising: n EL layers between an anode and a cathode (n is a natural number of two or more); a first layer, a second layer, and a third layer between m-th EL layer from the anode and (m+1)-th EL layer (m is a natural number, 1≦m≦n−1), wherein the first layer includes a first donor material and is in contact with the m-th EL layer, wherein the second layer includes an electron-transport material and a second donor material and is in contact with the first layer, wherein the third layer includes a hole-transport material and an acceptor material and is in contact with the second layer and with the (m+1)-th EL layer, wherein the third layer is a charge generation layer, and wherein a LUMO level of the second layer is between a LUMO level of the first layer and an acceptor level of the third layer.