Heterocyclic compound and application thereof

A display panel, comprising an organic light-emitting device, wherein the organic light-emitting device includes an anode, a cathode, and an organic thin film layer between the anode and the cathode;

• the cathode is covered with a capping layer (CPL);
• and the CPL layer contains at least a heterocyclic compound, having a structure shown in formula I, the heterocyclic compound comprising:
• wherein:
• Y1 is selected from 0 or S;
• X1, X2, X3, X4, X5, X6, X7, and X8 are independently selected from CRa or N, and at least one of X1, X2, X3, X4, X5, X6, X7, and X8 is N;
• X9, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19, X20, X21, X22, X23, and X24 are independently selected from CR1 or N;
• when there are a plurality of CRa in X1-X8, Ra are same or different;
• and Ra is independently selected from hydrogen, deuterium, tritium, halogen, nitrile, cyano, nitro, hydroxyl, carbonyl, ester, carboxyl, imide, amide, substituted or unsubstituted C1-C20 alkoxy, substituted or unsubstituted C1-C20 alkyl, substituted or unsubstituted C3-C20 cycloalkyl, substituted or unsubstituted C2-C20 alkenyl, substituted or unsubstituted C3-C20 cycloalkenyl, substituted or unsubstituted silyl, substituted or unsubstituted boron, substituted or unsubstituted phosphine oxide, substituted or unsubstituted phosphine, substituted or unsubstituted sulfonyl, substituted or unsubstituted amine, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, or a ring structure formed by bonding adjacent groups;
• Y2, and Y3 are independently selected from 0, S or NR2;
• Ar1 and Ar2 are independently selected from substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl;
• and
• R1 and R2 are independently selected from hydrogen, deuterium, substituted or unsubstituted C1-C20 alkyl, substituted or unsubstituted C6-C30 aryl, or substituted or unsubstituted C3-C30 heteroaryl.

A display panel, comprising an organic light-emitting device, wherein the organic light-emitting device includes an anode, a cathode, and an organic thin film layer between the anode and the cathode;

• the organic thin film layer includes a hole transport layer and/or an electron transport layer, wherein at least one of the hole transport layer and the electron transport layer contains at least a heterocyclic compound, having a structure shown in formula I, the heterocyclic compound comprising:
• wherein:
• Y1 is selected from 0 or S;
• X1, X2, X3, X4, X5, X6, X7, and X8 are independently selected from CRa or N, and at least one of X1, X2, X3, X4, X5, X6, X7, and X8 is N;
• X9, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19, X20, X21, X22, X23, and X24 are independently selected from CR1 or N;
• when there are a plurality of CRa in X1-X8, Ra are same or different;
• and Ra is independently selected from hydrogen, deuterium, tritium, halogen, nitrile, cyano, nitro, hydroxyl, carbonyl, ester, carboxyl, imide, amide, substituted or unsubstituted C1-C20 alkoxy, substituted or unsubstituted C1-C20 alkyl, substituted or unsubstituted C3-C20 cycloalkyl, substituted or unsubstituted C2-C20 alkenyl, substituted or unsubstituted C3-C20 cycloalkenyl, substituted or unsubstituted silyl, substituted or unsubstituted boron, substituted or unsubstituted phosphine oxide, substituted or unsubstituted phosphine, substituted or unsubstituted sulfonyl, substituted or unsubstituted amine, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, or a ring structure formed by bonding adjacent groups;
• Y2, and Y3 are independently selected from O, S or NR2;
• Ar1 and Ar2 are independently selected from substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl;
• and
• R1 and R2 are independently selected from hydrogen, deuterium, substituted or unsubstituted C1-C20 alkyl, substituted or unsubstituted C6-C30 aryl, or substituted or unsubstituted C3-C30 heteroaryl.