Perovskite layer, manufacture method for perovskite layer, perovskite layer solar cell, and perovskite layer solar cell assembly

A perovskite layer, wherein the perovskite layer comprises perovskite seed crystals and a perovskite thin film;

• and
• a first interface is disposed between the perovskite seed crystals and the perovskite thin film, and the first interface is observable by using a high-resolution scanning electron microscope;
• wherein the first interface between the perovskite seed crystals and the perovskite thin film further comprises a structure transition layer, wherein a lattice parameter of the structure transition layer changes in a first order, and an atom-arrangement mode of the structure transition layer changes in a second order, wherein the first order refers to an order in which, in a direction further away from the perovskite seed crystals, an initial parameter changes into a second parameter greater than the initial parameter and subsequently changes into the initial parameter, and the second order refers to an order in which, in the direction further away from the perovskite seed crystals, an ordered arrangement changes into an unordered arrangement and subsequently changes into an ordered arrangement.