Ink for printing OLED hole transport layer by using aerosol, preparation method and applications thereof

The invention discloses ink for printing an OLED hole transport layer by using an aerosol, a preparation method and applications thereof, wherein the ink comprises an organic small molecule hole transport material and an organic solvent, the organic small molecule hole transport material comprises a triarylamine derivative, a carbazole derivative and the like, and the organic solvent comprises ether, ester, phenol, amine and the like. According to the invention, by using an aerosol printing technology, the ink forms a hole transport layer ink film so as to obtain an OLED hole transport layer;the preparation method is simple, the ink has stable performance, proper viscosity and proper surface tension, can meet the technological requirements of aerosol printing, and can achieve high-precision printing; and the ink only contains the single-component environmentally-friendly organic solvent, so that the ink film annealing process is easy to regulate and control, the film forming uniformity is good, and the inject