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Abstract

High pressure is an effective means to manipulate the crystal structure and optical properties of hybrid metal halides. By pressure treatment of the zero-dimensional metal halide BTPP₂ZnBr₄ (BTPP = Benzyl triphenyl phosphonium), a 7-fold enhanced blue emission is obtained. In-situ synchrotron powder X-ray diffraction and Raman experiments show that the phenomenon arises from an irreversible structural compression. More details are discussed in the article by Li et al. on pages 524—530.