Perovskite film layer, device and manufacturing method to effectively improve light emitting device efficiency

摘要

The present invention provides a perovskite film layer and a device and a manufacturing method that effectively improves the perovskite optoelectronic device efficiency, wherein the perovskite film layer is a discontinuous and irregularly distributed perovskite particle (5 ) And a low refractive index organic insulating layer 4 interposed between the perovskite particles, wherein the perovskite particles form a plurality of convex portions, and the organic insulating layer comprises a plurality of concave portions between the convex portions. To form. Organic insulation intercalated between perovskite particles and perovskite particles during film production by adding excess alkyl ammonium salt and/or organic molecules with specific functional groups to the perovskite precursor solution The uneven structure of the layer is formed spontaneously, which can cause the upper charge transport layer and the electrode to spontaneously form a undulating pleated structure. The special perovskite film structure formed by this simple solution method can effectively improve the light collection efficiency and ultimately improve the performance of the perovskite light emitting device.