Induced circularly polarized luminescence of perovskite nanocrystals by self-assembly chiral gel

Perovskites nanocrystals (NCs) with circularly polarized light (CPL) activity have drawn much attention due to the fascinating photoelectric properties of perovskite NCs as well as the abundant applications of CPL in three-dimensional (3D) displays, nonlinear optics, spintronics devices, CPL lasers, and so on. Herein, bio-inspired by life, we designed and synthesized a simple amphiphilic molecule which could self-assemble into chiral gel with helix chirality in non-polar solvents. Through co-assembly of the CsPbX₃ NCs with the chiral gel, CPL at the first excitation band of CsPbX₃ NCs is induced in the whole visible spectrum with a maximum g_lum of 8.2 × 10⁻³. The induced CPL arises from the selective CPL-absorption of the CsPbX₃ NCs’ luminesce by the chiral gel, which provides a facile and practical approach to induce CPL in perovskite NCs and other nanocrystals.