3results about "Halide preparation methods" patented technology

The invention relates to the field of semiconductor materials with photoelectric functions, in particular to a synthesis method of a perovskite precursor material. According to the synthesis method of the perovskite precursor material, the waste liquid treatment step is added, the waste liquid treatment step is based on the synthesis step of the precursor material, lead-free emission and high lead element recovery rate are achieved, the preparation process is completely carried out in a conventional air environment, and extra environment control cost is avoided; no organic solvent is needed in the preparation process, and the solvent for washing can be completely recycled theoretically, so that the cost and environmental pollution are reduced; the lead element is recycled after preparation, so that the pollution is reduced while the cost is saved, and nearly complete utilization of the lead element can be realized in the circulation process; the prepared perovskite precursor is good in performance; the steps are simple and easy to industrialize.

A method for producing a halide according to the present disclosure comprises baking, in a vacuum or in an inert gas atmosphere, a mixture material containing a powder of MOx and a powder of NH4X. M represents at least one element selected from rare earth elements, X represents at least one element selected from F, Cl, Br, and I, x is 1-2, and, when the average particle diameter of the powder of MOx is defined as D1 and the average particle diameter of the powder of NH4X is defined as D2, requirement (a) or (b) is satisfied.　(a): D1≤D2 and D2-D1≤0.5×D2 (b): D2<D1 and D1-D2≤0.5×D1

The present invention relates to methods of purifying metal halide precursors and related compositions, related methods, and the like. One method includes one or more of the following steps: obtaining a metal halide precursor, the metal halide precursor including a metal halide compound and at least one impurity; contacting the metal halide precursor with an oxygen-containing compound in the presence of a polar oxygen-free solvent to form a reaction product in solution; and separating at least one of the reaction product, at least a portion of the at least one impurity, at least a portion of the solution, or any combination thereof. Other compositions and methods are provided herein.