Structural Transformation and Luminescence Switching of Hybrid Antimony Halides for Single-Component White Light and Encryption
Ruoyu Zhang, Dan Ni, Xiaoning Gao, Hong‐Ru Fu, Yuming Guo, Lu‐Fang Ma
Abstract
Organic–inorganic metal halides (OIMHs) have attracted great attention for white light emission and also exhibited structural transformation-induced luminescence switching for encryption. However, it is still challenging to explore Sb-based halides for single-component white light-emitting diodes (WLEDs) and to show fast phase transitions for anticounterfeiting. Herein, through unveiling the full potential of organic components, three Sb-based halide hybrids (TPP-HBtrz)SbCl 5 ([TPP-Btrz]Cl = [(1H-Benzotriazol-1-yl)methyl]triphenylphosphonium chloride), (TPP-Btrz) 2 Sb 2 Cl 8, and (TPP-HBtrz)SbBr 5 were rapidly prepared. (TPP-HBtrz)SbCl 5 exhibits white light emission benefiting from the combination of organic cation and self-trapped exciton (STE) emission of [SbCl 5 ] 2– . The WLED shows white light emission with CIE coordinates of (0.32, 0.34), a correlated color temperature (CCT) of 6130 K, and a color-rendering index (CRI) of 86. Moreover, the fast structural transformations among them are achieved when stimulated by ethanol or HCl solutions, leading to a multilevel encryption.