White light emission in 0D halide perovskite [(CH₃)₃S]₂SnCl₆·H₂O crystals through variation of doping ns² ions

Abstract

With the rapid development of white LEDs, the research of new and efficient white light emitting materials has attracted increasing attention. Zero dimensional (0D) organic–inorganic hybrid metal halide perovskites with superior luminescent property are promising candidates for LED application, due to their abundant and tailorable structure. Herein, [(CH₃)₃S]₂SnCl₆·H₂O is synthesized as a host for dopant ions Bi³⁺ and Sb³⁺. The Sb³⁺ doped, or Bi³⁺/Sb³⁺ co-doped, [(CH₃)₃S]₂SnCl₆·H₂O has a tunable optical emission spectrum by means of varying dopant ratio and excitation wavelength. As a result, we can achieve single-phase materials suitable for emission ranging from cold white light to warm white light. The intrinsic mechanism is examined in this work, to clarify the dopant effect on the optical properties. The high stability of title crystalline material, against water, oxygen and heat, makes it promising for further application.

Key words： 0D; Metal halide; White light; Perovskite; Ions doping; Excitation dependent

References

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