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Open Access Publications from the University of California

Copper(I)-Based Highly Emissive All-Inorganic Rare-Earth Halide Clusters

  • Author(s): Lin, J;
  • Chen, H;
  • Kang, J;
  • Quan, LN;
  • Lin, Z;
  • Kong, Q;
  • Lai, M;
  • Yu, S;
  • Wang, L;
  • Wang, LW;
  • Toney, MF;
  • Yang, P
  • et al.

Halide perovskites are of great interest because of their large potential for a broad range of applications, such as photovoltaics, light-emitting diodes, and photodetectors. However, currently the state-of-the-art highly emissive halide perovskite materials contain toxic lead ions, and the synthesis of color-stable efficient blue-emissive perovskite analogs remains challenging. The discovery of lead-free, non-toxic halide materials with efficient blue light emission is promising for practical light-emitting applications. Here, we have discovered a series of highly blue-emissive all-inorganic Cu(I)-containing rare-earth halide compounds in the solid state at room temperature. The Cu(I) ions in the compounds show a 3-coordination geometry with the halide ions and connect Sc-Cl octahedra to form clusters in alternating layers, which play a crucial role in the regulation of the electronic structure and emission properties of this series of rare-earth halide cluster compounds.

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