Journal article
Disphenoidal Zero-Dimensional Lead, Tin, and Germanium Halides: Highly Emissive Singlet and Triplet Self-Trapped Excitons and X-ray Scintillation
Journal of the American Chemical Society, Vol.141(25), pp.9764-9768
26 Jun 2019
PMID: 31244134
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Low-dimensional metal halides have been researched as optoelectronic materials for the past two decades. Zero-dimensional halides of ns(2) elements (Sn, Pb, Sb) have recently gained attention as highly efficient broadband light emitters. These compounds comprise discrete metal halide centers, isolated by bulky organic cations. Herein, we report isostructural halide complexes of Ge(II), Sn(II), and Pb(II) with a 1-butyl-1-methyl-piperidinium cation (Bmpip), featuring unusual disphenoidal coordination with a highly stereoactive lone pair. Spectrally broad, bright emission from highly localized excitons, with quantum efficiencies of up to 75%, is observed in blue to red spectral regions for bromides (for Pb, Sn, and Ge, respectively) and extends into the near-infrared for Bmpip(2)SnI(4) (peak at 730 nm). In the case of Sn(II) and Ge(II), both singlet and triplet excitonic emission bands have been observed. Furthermore, Bmpip(2)SnBr(4) and Bmpip(2)PbBr(4) exhibit X-ray-excited luminescence (radioluminescence) with brightness being commensurate with that of a commercial inorganic X-ray scintillator (NaI:Tl).
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Details
- Title
- Disphenoidal Zero-Dimensional Lead, Tin, and Germanium Halides: Highly Emissive Singlet and Triplet Self-Trapped Excitons and X-ray Scintillation
- Creators
- Viktoriia Morad - ETH ZurichYevhen Shynkarenko - ETH ZurichSergii Yakunin - ETH ZurichAlexandra Brumberg - Northwestern UniversityRichard D. Schaller - Northwestern UniversityMaksym V. Kovalenko - ETH ZurichArgonne National Lab. (ANL), Argonne, IL (United States)
- Publication Details
- Journal of the American Chemical Society, Vol.141(25), pp.9764-9768
- Publisher
- Amer Chemical Soc
- Number of pages
- 5
- Grant note
- DE-AC02-06CH11357 / U.S. Department of Energy, Office of Science; United States Department of Energy (DOE) DGE-1324585 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000473251500004
- Scopus ID
- 2-s2.0-85067917360
- Other Identifier
- 991022053867204721
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- Domestic collaboration
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- Web of Science research areas
- Chemistry, Multidisciplinary