Physics · Materials Science

With reference to chiral perovskite films recently studied by researchers, consider the following statements: I. Chirality in materials enables unique light-matter interactions, such as controlling electron spin and detecting circularly polarized light. II. Most chiral materials studied so far have been organic in nature, but halide perovskites offer superior charge transport properties. III. In the crystallization of 2D methylbenzylammonium copper bromide ((R/S-MBA)2CuBr4) films, growth begins from the substrate and proceeds upward towards the air interface. IV. Vacuum processing and careful solvent selection can suppress 1D impurity phases that degrade device performance. Which of the statements given above are correct?