2results about How to "Avoid the "coffee ring effect"" patented technology

This application relates to the field of optoelectronic materials technology, and in particular to a method for preparing perovskite thin films on curved substrates, perovskite thin films, and their applications. The method includes: applying a perovskite precursor solution to a curved substrate, partially drying it to form a perovskite precursor liquid film on the curved substrate; immersing the curved substrate with the perovskite precursor liquid film into a first solution to aggregate the perovskite precursor in the liquid film, forming a perovskite precursor gel on the curved substrate; immersing the curved substrate with the perovskite precursor gel into a second antisolvent and heating it to crystallize the perovskite precursor, forming a primary perovskite thin film on the curved substrate; and annealing the primary perovskite thin film on the curved substrate to form a perovskite thin film. The preparation method provided in this application allows for the preparation of perovskite thin films with uniform thickness, low pinhole rate, low defect density, and uniform crystallinity on curved substrates.

The invention discloses laser curing type conductive silver ink for electronic components and a preparation method of the laser curing type conductive silver ink. The laser curing type conductive silver ink comprises a silver precursor, an amine complexing agent, a non-polar organic solvent and an additive, a silver precursor and an amine complexing agent form a uniform and stable silver-amine complex solution in a non-polar organic solvent. The preparation method comprises the following steps: uniformly mixing a non-polar organic solvent, an amine complexing agent and an additive, then adding a silver precursor, stirring until the silver precursor is completely dissolved, and filtering to obtain the conductive silver ink with excellent conductivity, stability and printing performance. The invention also provides a method for preparing a conductive film on a substrate by using the conductive silver ink through a laser sintering process. According to the conductive silver ink, the light absorption characteristic of the silver-amine complex is regulated and controlled through the non-polar solvent, so that the conductive silver ink perfectly adapts to a laser sintering process, and the conductive silver ink has the advantages of being low in curing energy consumption, short in curing time, free of thermal damage to a flexible base material, high in conductivity of a formed silver film, high in adhesive force and the like, and is suitable for the fields of flexible electronics, printed circuits and the like.