| abstract |
The invention relates to a kind of compounds represented by a formula (I), wherein Ar is selected from a C6-C30 polycyclic aromatic hydrocarbon group; Ar1 and Ar2 are independently selected from one of H, fatty group alkyl with 1-20 C atoms, aromatic group with 6-20 C atoms, or N- or S-containing aromatic heterocyclic group with 4-30 C atoms; and Ar1 and Ar2 cannot be H at the same time; and n is equal to 1 or 2. The organic compounds have advantages of stable property, simple preparation technology, has high carrier mobility, can be used in an electron transfer layer in an organic electroluminescent device, can obviously reduce drive voltage, and raise current efficiency. |