Method for preparing solar cell, solar cell, and tandem solar cell

Abstract

A method for preparing a solar cell includes: providing a carrier plate and a separation auxiliary layer, forming a perovskite absorption layer, having a first side facing away from the separation auxiliary layer and a second side opposite to the first side and including a bonding matrix and monocrystal perovskite particles, over the separation auxiliary layer away from the carrier plate, at least some of the monocrystal perovskite particles having first convex surfaces and second convex surfaces protruding from the bonding matrix on the first and second side respectively, and a functional layer formed over a respective monocrystal perovskite particle; forming a first carrier transport layer on the first side of the perovskite absorption layer; forming a first conductive layer over the first carrier transport layer; removing the carrier plate and the separation auxiliary layer, and forming a second conductive layer on the second side of the perovskite absorption layer.