| abstract |
The invention provides a preparation method of a Bi-based perovskite light-absorbing layer material, which is characterized in that: the specific steps are: step 1 prepares a TiO 2 substrate; step 2 prepares a perovskite precursor solution, and respectively prepares CsI, BiI 3 , CH 4 N 2 S according to the molar ratio of 1:1:X, where X=0,1,2,3, was added to 1ml of N,N-dimethylformamide solution and magnetically stirred for 3-5h to prepare the precursor Bulk solution; step 3, drop the prepared precursor solution on the previously prepared TiO 2 substrate for spin coating; step 4, heat the spin-coated film; step 5, perform characterization analysis on the prepared perovskite film . The invention has simple process, low cost, easy operation and high repeatability. |