Organic light-emitting diode and display panel

An organic light-emitting diode, comprising:

• a first electrode;
• a second electrode opposite to the first electrode;
• a light-emitting layer between the first electrode and the second electrode;
• a hole blocking layer between the light-emitting layer and the second electrode;
• and
• an electron transport layer between the hole blocking layer and the second electrode,
• wherein an energy level difference between a HOMO energy level of the hole blocking layer and a HOMO energy level of the light-emitting layer is larger than or equal to 0.1 eV;
• and
• an energy level difference between a HOMO energy level of the electron transport layer and the HOMO energy level of the hole blocking layer is larger than or equal to 0.1 eV;
• wherein the light-emitting layer comprises a blue luminescent material;
• and
• wherein the blue luminescent material comprises a blue luminescent host material and a blue luminescent guest material, and a T1 energy level of the electron transport layer is higher than a T1 energy level of the hole blocking layer, the T1 energy level of the hole blocking layer is higher than a T1 energy level of the blue luminescent guest material, and the T1 energy level of the blue luminescent guest material is higher than a T1 energy level of the blue luminescent host material;
• the blue luminescent host material comprises BH (9-(4-(naphthalen-1-yl)phenyl)-10-phenylanthracene) which has the following formula:
• the blue luminescent guest material comprises BD (N1,N1,N6-tris(2,4-dimethylphenyl)-N6-(o-toyl)pyrene-1,6-diamine) which has the following formula:
• the hole blocking layer comprises a material of TPBI which has the following formula:
• and
• the electron transport layer comprises an electron transport material having one of the following chemical formulas 1-1 to 1-8: