Dynamic bandgap modulation in CsPbBr perovskite nanocrystals through reversible ammonia intercalation.

Modulation of the electronic states of a semiconductor is an intriguing area of research because of its interesting applications. In general, physical methods are used to reversibly manipulate the bandgap of semiconductors. Herein, we have used a simple molecule, ammonia, and allowed it to intercalate inside the crystal lattice of CsPbBr perovskites to alter the band positions.