Search

The rich chemistry of organic metal halide hybrids has enabled the development of a variety of new functional materials with crystal structures beyond perovskites. In article number 1801474, Biwu Ma and co‐workers report a novel bulk assembly of one‐dimensional (1D) organic metal halide hybrid, C5H16N2Pb2Br6, in which lead bromide octahedrons form a corrugated chain structure via non‐planar edge‐sharing. This 1D material exhibits a broadband yellow emission peaked at 554 nm with a full width at half maximum of 155 nm with a photoluminescence quantum efficiency of around 10%, due to exciton self‐trapping. [ABSTRACT FROM AUTHOR]

The family of molecular level low‐dimensional organic metal halide hybrids has expanded significantly over the last few years. Here a new type of 1D metal halide structure is reported, in which metal halide octahedra form a corrugated double‐chain structure via nonplanar edge‐sharing. This material with a chemical formula of C5H16N2Pb2Br6 exhibits a broadband yellow emission under ultraviolet light excitation with a photoluminescence quantum efficiency of around 10%. The light‐yellow emission is considered to be attributed to self‐trapping excitons. Theoretical calculations show that the unique alignment of the octahedra leads to small band dispersion and large exciton binding energy. Together with previously reported 1D metal halide wires and tubes, this new bulk assembly of 1D metal halides suggests the potential to develop a library of bulk assemblies of metal halides with controlled structures and compositions. A novel molecularly 1D metal halide C5H16N2Pb2Br6 is discovered, in which metal halide octahedra employ a double‐chain structure in the bulk crystals. C5H16N2Pb2Br6 exhibits a broadband yellow emission with a photoluminescence quantum efficiency of ≈10% due to exciton self‐trapping. [ABSTRACT FROM AUTHOR]