Organic light-emitting diode, method for preparing organic light-emitting diode, display panel, and display device

An organic light-emitting diode comprising:

• an anode, a cathode and a light-emitting layer between the anode and the cathode,
• the light-emitting layer having a blue light host material,
• a side of the light-emitting layer facing the anode having an electron blocking layer in a direction away from the light-emitting layer,
• the electron blocking layer having a hole material,
• the hole material having the structural formula as shown in the following formula (I), and
• the blue light host material having the structural formula as shown in the following formula (II):
• wherein, q and p are each independently 1, 2 or 3, R1-R4 are each independently selected from H, C6-C50 aryl, C6-C50 aromatic heterocyclic, C6-C50 alkyl, C6-C50 alkoxy, C6-C50 aralkyl, C6-C50 aryloxy, C6-C50 arylthio, carbonyl, carboxyl, halogen, cyano, nitro, and hydroxyl, and at least one of R1 and R2 is a large steric hindrance group containing not less than 12 carbon atoms, and R3 and R4 are not simultaneously H;
• m is 0 or 1, and R5 is phenyl or biphenyl;
• A1 and A2 are each independently selected from substituted or unsubstituted C6-C50 aryl, and L is a single bond, phenylene or naphthene.