Light-emitting device, display apparatus, and electronic system

A light-emitting device comprising:

• a cathode;
• an anode;
• a first light-emitting layer that is disposed between the cathode and the anode and that emits light of a first color, the first light-emitting layer containing a first light-emitting material that emits the light of the first color and a first host material that supports the first light-emitting material as a guest material;
• a second light-emitting layer that is disposed between the first light-emitting layer and the cathode and that emits light of a second color different from the first color;
• and
• an intermediate layer that is disposed between and in contact with the first light-emitting layer and the second light-emitting layer and that contains a first material and a second material having a higher hole mobility than the first material;
• wherein the light-emitting device satisfies inequalities (4) and (5):
• |HLB−HLC|<|HLA−HLC| (4)
• |HLA−HLC|≧0.3[eV] (5)
• wherein HLA [eV] is the energy level of the highest occupied molecular orbital of the first material, HLB [eV] is the energy level of the highest occupied molecular orbital of the second material, and HLC [eV] is the energy level of the highest occupied molecular orbital of the first host material.