Moisture-Induced reversible structure conversion of Zero-Dimensional organic cuprous bromide hybrids for multiple photoluminescent anti-Counterfeiting, information encryption and rewritable luminescent paper

•Two organic cuprous bromide hybrids, namely (TPA)CuBr2 and (TPA)2Cu4Br6, with different coordination geometries were synthesized.•The different lattice structure and charge distribution were the dominant reasons for their different self-trapped exciton emission.•A reversible structural transition triggered by water or heat can be witnessed between (TPA)CuBr2 and (TPA)2Cu4Br6.•We construct a series of anti-counterfeiting, information encryption scenarios and the rewritable PL paper.