Organic electroluminescent element, method for manufacturing same, and organic electroluminescent display device

An organic electroluminescent element comprising:

• a positive and negative charge transport layer having a hole transporting capability and an electron transporting capability;
• an anode;
• a cathode;
• and
• a substrate,
• the positive and negative charge transport layer being interposed between the anode and the cathode,
• the positive and negative charge transport layer, the anode, and the cathode being stacked on the substrate,
• the positive and negative charge transport layer, which is a homojunction-type layer, comprising:
• a light-emitting region which is doped with a light-emitting dopant,
• the positive and negative charge transport layer further comprising at least one of:
• an electron blocking region, provided closer to the anode than the light-emitting region, having a lowest unoccupied molecular orbital an absolute value of which is smaller than that of the lowest unoccupied molecular orbital of the light-emitting region;
• and
• a hole blocking region, provided closer to the cathode than the light-emitting region, having a highest occupied molecular orbital an absolute value of which is larger than that of the highest occupied molecular orbital of the light-emitting region,
• the positive and negative charge transport layer being formed to be a thin layer by reaction of at least one of organic material components for the positive and negative charge transport layer on a surface of the substrate or in a vapor phase.