Organic electroluminescent device, display panel, and display apparatus

A display panel, comprising:

• a plurality of organic electroluminescent devices, wherein the organic electroluminescent device comprises:
• an anode and a cathode in opposite;
• a light-emitting layer between the anode and the cathode;
• a first auxiliary function layer between the light-emitting layer and the anode;
• and
• a second auxiliary function layer between the light-emitting layer and the cathode;
• wherein
• the light-emitting layer comprises a first compound, a second compound, a third compound and a fourth compound;
• the first compound and the second compound are capable of forming a first excimer, and the second compound and the third compound are capable of forming a second excimer;
• an emission spectrum peak of the first excimer is smaller than an emission spectrum peak of the second excimer;
• an overlapping area between an emission spectrum of the first excimer and an absorption spectrum of the third compound is greater than a first set value, and an overlapping area between an emission spectrum of the second excimer and an absorption spectrum of the fourth compound is greater than a second set value.

A display apparatus, comprising:

• a display panel, wherein the display panel comprises a plurality of organic electroluminescent devices, wherein the organic electroluminescent device comprises:
• an anode and a cathode in opposite;
• a light-emitting layer between the anode and the cathode;
• a first auxiliary function layer between the light-emitting layer and the anode;
• and
• a second auxiliary function layer between the light-emitting layer and the cathode;
• wherein
• the light-emitting layer comprises a first compound, a second compound, a third compound and a fourth compound;
• the first compound and the second compound are capable of forming a first excimer, and the second compound and the third compound are capable of forming a second excimer;
• an emission spectrum peak of the first excimer is smaller than an emission spectrum peak of the second excimer;
• an overlapping area between an emission spectrum of the first excimer and an absorption spectrum of the third compound is greater than a first set value, and an overlapping area between an emission spectrum of the second excimer and an absorption spectrum of the fourth compound is greater than a second set value.