PEROVSKITE FILM LAYER, DEVICE AND MANUFACTURING METHOD FOR EFFECTIVELY IMPROVING EFFICIENCY OF LIGHT-EMITTING DEVICE

摘要

Disclosed are a perovskite film layer, a device and a manufacturing method for effectively improving the efficiency of a perovskite optoelectronic device. The perovskite film layer consists of a layer of discontinuous, irregularly distributed perovskite grains (5) and an organic insulating layer (4) with a low refractive index embedded between the perovskite grains. The perovskite grains form a plurality of convex portions, and the organic insulating layer forms a plurality of concave portions between the convex portions. By means of adding an excess of an alkylammonium salt and/or an organic molecule having a specific functional group to a perovskite precursor solution, the perovskite crystal grains and concave-convex structures of the organic insulating layer embedded between the perovskite grains are spontaneously formed during a thin film manufacturing process, and an upper charge transmission layer and an electrode spontaneously form pleated concave-convex structures. Such a special perovskite thin film structure formed by means of a simple solution method can effectively improve light collecting efficiency, and finally improve the performance of the perovskite light-emitting device.