Lyotropic liquid crystalline phases of anisotropic nanoparticles of organic–inorganic metal halide perovskites: photoluminescence from self-assembled ordered microstructures of semiconductors

Within one hour at room temperature, 2D lead iodide perovskites (R-NH₃)₂PbI₄ with semiconductivity were transformed into colloidal liquid crystalline phases exhibiting optical anisotropy and photoluminescence.