Perovskite solar cells are solar cells that use perovskite structural materials as light absorbing materials. They belong to the third generation of thin-film cells, including single junction perovskite cells and perovskite stacked cells. They have the characteristics of high energy conversion efficiency, low price, light weight, and high flexibility.

　　At present, the efficiency of crystalline silicon cells is gradually approaching the theoretical efficiency limit of 29.4%, the theoretical efficiency limit of perovskite single junction cells is 33.7%, and the theoretical efficiency limit of all perovskite stacked cells can reach 44%.

　　Perovskite optoelectronic materials are prone to phase transition under the influence of external environments such as temperature, light, pressure, etc. In the preparation process of perovskite solar cells, the influence of temperature on perovskite materials is most significant

　　Perovskite stacked cells are composed of multiple sub cells with different band gaps. The wide bandgap top cell and the narrow bandgap bottom cell absorb short wavelength and long wavelength solar light, respectively, which can effectively broaden the range of solar energy spectrum utilization and improve the photoelectric conversion efficiency of solar cells.

　　There are many testing equipment for perovskite solar cells, and different devices are used to test the characteristics of perovskite cells.

　　Perovskite steady-state LED solar simulator can simulate lighting conditions close to sunlight and test the current voltage characteristics of perovskite cells under different lighting intensities.

　　The principle of the perovskite cell EL tester is to apply voltage to the perovskite cell to generate electroluminescence, and then capture the image with an EL imaging camera. Detect defects, cracks, and other abnormal issues in battery materials.