Bulk Assembly of Corrugated 1D Metal Halides with Broadband Yellow Emission

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...

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Bibliographic Details
Published in:Advanced optical materials 2019-03, Vol.7 (6), p.n/a
Main Authors: Lin, Haoran, Zhou, Chenkun, Neu, Jennifer, Zhou, Yan, Han, Dan, Chen, Shiyou, Worku, Michael, Chaaban, Maya, Lee, Sujin, Berkwits, Ella, Siegrist, Theo, Du, Mao‐Hua, Ma, Biwu
Format: Article
Language:English
Subjects:
1D structures
Assembly
Broadband
Emission spectra
exciton self‐trapping
Excitons
Facilities management
Halides
Materials science
Metal halides
Optics
Organic chemistry
organic metal halide hybrids
Photoluminescence
quantum confinement effect
Quantum efficiency
Tubes
Ultraviolet radiation
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Summary: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.
ISSN:2195-1071
2195-1071
DOI:10.1002/adom.201801474