| abstract |
The invention discloses a photocrosslinkable hole transport material containing a benzophenone group and a preparation method and application thereof; the hole transport material uses TFB as a parent core and benzophenone as a crosslinking group Agglomerated polymer hole transport material, the chemical structural formula is as follows: In the formula, x and y are both mole fractions, 0<x<1, 0<y<1. The material film forms a three-dimensional network structure under ultraviolet radiation to realize the cross-linking of the material, obtains a cross-linked material with solvent resistance, and realizes the preparation of a light-emitting device by an all-solution method. The cross-linked material has high hole injection and transport capabilities, and its performance is significantly better than that of commercial TFB hole transport materials. This photo-cross-linking method does not require the addition of initiators or catalysts, and the cross-linking time is short and the reaction process is free of side effects. The product and the required long ultraviolet excitation wavelength (365nm) have little damage to the material and have little influence on the electrical and optical properties of the hole transport material before and after crosslinking. |