Organic micromolecule film containing protonating nitrogen atom and preparation method thereof

The invention provides an organic micromolecule film containing a protonating nitrogen atom and a preparation method thereof, and belongs to the technical field of organic photoelectric materials. The organic micromolecule film has a structural formula shown in the specification, wherein R1, R2, R3 and R4 are respectively any one of the following five groups shown in the specification. According to the preparation method, by adopting the constant potential or constant current electro-deposition method, the prepared organic micromolecule film is composed of nano-particles or lamellar crystal, has a uniform surface, and excludes oxidation products; the appearance and thickness of the prepared organic micromolecule film can be controlled by adjusting the concentration of electrolyte, working voltage, working current and deposition time. The preparation method has the advantages that the energy consumption is small, the operation is easily controlled, the cost is low, and industrial production can be conveniently