| abstract |
The present invention provides a phosphorescence host compound such as structural formula I, which has good thermal stability, high luminous efficiency, and high luminous purity, and can be used to make organic electroluminescent devices, and can be applied to organic solar cells and organic thin films field of transistors or organic photoreceptors. The present invention also provides an organic electroluminescence device, which comprises an anode, a cathode and an organic layer, the organic layer comprising a light-emitting layer, a hole injection layer, a hole transport layer, a hole blocking layer, an electron injection layer, and an electron transport layer One or more layers of the organic layer, at least one layer of the organic layer contains a compound such as structural formula I. |