Excitation-mode-selective emission through multiexcitonic states in a double perovskite single crystal

Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk, different excitonic states in the crystals can be selectively excited by ultraviolet light, X-ray irradiation, and mechanical action, enabling dynamic control of steady/transient-state spectral features by modulating the excitation modes. Remarkably, the transparent crystal exhibits highly efficient white…

• NN
  National Natural Science Foundation of China

  Awards: 12004093, 12474402 and 12004093
• HU
  Huazhong University of Science and Technology
• IA
  Innovation and Technology Commission

  Award: MHP/038/22
• IA
  Innovation and Technology Fund