Compositions of chiral molecules and perovskite nanocrystals and methods of making the same

A composition comprising:

• a nanocrystalline core comprising a perovskite having an outer surface;
• a chiral molecule comprising a functional group and a second group;
• and
• a halide, wherein:
• the perovskite comprises at least one of FAPb(XyX′zX″1−y−z)3, CsPb(XyX′zX″1−y−z)3, MAPb(XyX′zX″1−y−z)3, or Cs1−u−vMAuFAvPb(XyX′zX″1−y−z)3,
• X comprises at least one of iodide, bromide, or chloride,
• X′ comprises at least one of iodide, bromide, or chloride and is different than X,
• X″ comprises at least one of iodide, bromide, or chloride and is different than X and X′,
• 0≤z≤1, 0≤y≤1, 0≤u≤1, 0≤v≤1,
• the functional group comprises an amine group,
• the second group comprises a hydrocarbon having between 3 and 30 carbon atoms,
• the functional group is bonded to a first portion of the outer surface,
• the halide interacts with at least one of the outer surface or with the chiral molecule, and
• the composition is capable of circularly polarized luminescence (CPL).