In this paper, the photoelectric conversion properties and stability of 42 inorganic double perovskite materials were studied based on density functional theory (DFT). Starting from the construction of double perovskite crystal structures, the data mining algorithm in informatics was introduced into the analysis of high-throughput computing data. The results show that the tolerance factors of 39 crystals are between 0.8 and 1.10, indicating that these crystals have a stable perovskite structure. Then, the important parameters such as dielectric function, PDOS, elastic modulus, shear modulus and Poisson's ratio of the crystal were analyzed. Considering the band gap structure and absorption spectrum, it is found that the light absorption curves of Cs2SeI6，Cs2SeBr6 Rb2SeI6，Rb2SeBr6，and Rb2SeCl6 fall in a relatively large range in the visible light region.Further considering the stability factor Cs2SeI6, Rb2SeI6, Cs2SeBr6 and Rb2SeBr6 can be considered as ideal candidates for light absorbing materials, providing a basis for the industrial application of solar cells.
PACS: 78.56.-a 81.05.Fb 42.50.Nn