Organic electroluminescence device, light emitting device, organic electroluminescence display device and electronic device

An organic electroluminescence device comprising:

• a cathode;
• an anode;
• an emitting region provided between the cathode and the anode;
• and
• a hole transporting zone provided between the anode and the emitting region, wherein
• the emitting region comprises at least one emitting layer,
• the hole transporting zone comprises at least a first anode side organic layer, a second anode side organic layer and a third anode side organic layer,
• the first anode side organic layer is in direct contact with the second anode side organic layer,
• the first anode side organic layer and the second anode side organic layer are disposed between the anode and the emitting region in this order from the anode,
• the third anode side organic layer is disposed between the second anode side organic layer and the emitting region,
• the hole transporting zone further comprises a fourth anode side organic layer,
• the fourth anode side organic layer is disposed between the third anode side organic layer and the emitting region,
• a total film thickness of the hole transporting zone is in a range from 20 nm to 80 nm,
• the first anode side organic layer does not comprise a compound comprised in the second anode side organic layer,
• the first anode side organic layer comprises compounds comprising a first organic material and a second organic material,
• the first organic material is different from the second organic material,
• a content of the first organic material in the first anode side organic layer is less than 50 mass %, and
• a difference NM1−NM2 between a refractive index NM1 of a constituent material comprised in the first anode side organic layer and a refractive index NM2 of a constituent material comprised in the second anode side organic layer satisfies a relationship of a numerical formula (Numerical Formula N1) below,
• NM1−NM2≥0.04 (Numerical Formula N1).