| abstract |
The invention relates to a method for synthesizing high-purity two-dimensional layered CsPb 2 Br 5 nanosheets, comprising: S1: uniformly mixing a cesium source, a lead source and a halogen, and adding a nonpolar solution. S2: Use a grinder to grind the precursors of cesium source, lead source and halogen, and obtain mixed powder after grinding. S3: Covering the ground mixed powder with carbon powder and calcining to obtain high-purity two-dimensional layered CsPb 2 Br 5 nanosheets. Compared with the prior art, the preparation method of the present invention is simple to operate, the process flow is greatly reduced compared with the prior art, the raw materials are extensive, the stoichiometric ratio of elements is easy to control, and the industrial scale-up production is easy to realize. The high-purity Two-dimensional layered CsPb 2 Br 5 nanosheets can be used as optoelectronic materials; the liquid seal/liquid film seal is used to construct an oxygen-free environment, and carbon powder is used to prevent oxygen during the calcination process, which is beneficial to the two-dimensional layered CsPb 2 Br 5 Increased purity of nanosheets. |