Perovskite semiconductor materials are compoundsgiải ngoại hạng anh, and their bandgap can be adjusted between 1.2 eV and 3.2 eV through component adjustment. Adjust the bandgap of perovskite material to approximately 1.68 eV, and use stacking technology to form a stacked solar cell with crystalline silicon material with a bandgap of 1.12 eV. Perovskite acts as the top cell to absorb short wavelength high-energy photons, while crystalline silicon acts as the bottom cell to absorb long wavelength low-energy photons. The absorption of different wavelengths of light by sub cells with different bandgaps can reduce the thermal relaxation loss of photo generated carriers and effectively improve the photoelectric conversion efficiency of solar cells.

The theoretical efficiency limit of single crystal silicon solar cells is 29.4%ketquabongda, the actual laboratory efficiency record is 26.7%, and the highest average efficiency of mass-produced batteries is about 24.5%. The theoretical efficiency limit of perovskite/crystalline silicon double junction stacked solar cells can be increased to 42.5%, and the actual laboratory efficiency record has reached 29.52%, exceeding the theoretical limit of single crystalline silicon.

At presentketquabongda, through third-party testing and certification by the Chinese Academy of Metrology, the steady-state output efficiency of the small area perovskite/crystalline silicon double-end stacked battery independently developed by Yaoneng Technology has reached 32.44%.