| abstract |
The invention belongs to the technical field of spiro-ring hole transport materials, in particular to a spiro-ring hole transport material and its preparation method and application, which has the following general structural formula: Wherein, R is selected from one of hydrogen, halo, cyano, C 1-10 alkyl, substituted or unsubstituted C 1-12 alkoxy; A is phenylene or naphthylene; R 2 , R 3 are independently selected from phenyl, C 7-14 phenylalkyl, C 10-60 polycyclic conjugated aryl, C 12-60 aromatic heterocycle containing at least one of N, S, O One of the bases, the spirocyclic hole transport material of the present invention is used to prepare the hole transport layer material of the OLED device. This type of material has excellent thermal stability, high glass transition temperature and decomposition temperature, and is easy to form a good The amorphous film is applied in electroluminescent devices, which can obtain more stable effects and longer service life. |