33results about How to "Lower ohmic contact" patented technology

The invention provides a perovskite absorption layer and a preparation method and application thereof, and the preparation method comprises the steps: coating a perovskite wet film with an ionic liquid solution, and carrying out the annealing treatment, thereby obtaining a uniform, flat and smooth perovskite absorption layer. Compared with a common method of passivating the perovskite thin film after annealing, the method has the advantages that the wet film passivation distribution depth can be increased by selecting the appropriate passivation layer, so that the surface defects of the perovskite thin film are repaired more efficiently, and perovskite crystal lattices are stabilized. According to the preparation method, the one-time annealing process can be reduced, and the production line preparation time is shortened; and the upper interface of the perovskite thin film can be effectively modified, good ohmic contact with an electron transport layer is formed, and the photoelectric property of the perovskite solar cell is improved. In addition, a green and environment-friendly solvent with low toxicity and high volatility is selected, so that the method is suitable for large-size industrial assembly line preparation scenes.