Boron and nitrogen containing heterocyclic compounds

1. A compound having a structure of Formula IV:

wherein Y 1 -Y 18 are each independently selected from C, CR or N;

wherein Y 4 and Y 5 are carbon;

wherein Z is selected from CR z1 R z2 , PR z , O, S or Se, the Z can be same or different;

wherein R, R z1 , R z2 and R z are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted arylalkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted arylalkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a nitrile group, an isonitrile group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; and

wherein the compound is not a fullerene compound where carbon atoms are partially replaced with heteroatoms.

2. The compound of claim 1 , wherein the compound is selected from the group consisting of:

in the structure of the compounds above, wherein Ph is

3. The compound of claim 1 , wherein at least one of R is selected from the group consisting of phenyl, biphenyl, poly-phenyl, diarylamine, carbazole, azacarbazole, dibenzofuran, azadibenzofuran, dibenzothiophene, azadibenzothiophene, dibenzoselenophene, azadibenzoselenophene, triphenylene, azatriphenylene, tetraphenylene, diarylsilyl, and triarylsilyl.

4. A formulation comprising the compound of claim 1 .

5. The compound of claim 1 , wherein Z is selected from CRzl Rz2 or PRz.

6. The compound of claim 1 , wherein Z is CR z1 R z2 .

7. A first organic light-emitting device comprising:

an anode;

a cathode; and

an organic layer, disposed between the anode and the cathode, comprising the compound of claim 1 .

8. The first organic light-emitting device of claim 7 , wherein the organic layer is an emissive layer and the compound is an emitter.

9. The first organic light-emitting device of claim 8 , wherein the organic layer further comprises a host.

10. The first organic light-emitting device of claim 7 , wherein the organic layer is an emissive layer and the compound is a host.

11. The first organic light-emitting device of claim 7 , wherein the organic layer is a charge carrier blocking layer and the compound is a charge carrier blocking material in the organic layer.

12. The first organic light-emitting device of claim 7 , wherein the organic layer is a charge carrier transporting layer and the compound is a charge carrier transporting material in the organic layer.

13. The first organic light-emitting device of claim 7 , wherein the first organic light-emitting device is incorporated into a device selected from the group consisting of a consumer product, an electronic component module, an organic light-emitting device, and a lighting panel.