Inorganic antimony halide hybrids with broad yellow emissions.

Lead halide perovskites exhibit unexceptionable photoelectric properties. However, these materials are unsatisfactory in terms of stability and toxicity. Herein, we report RbSbCl as a new kind of lead free perovskite variants. This material can be easily obtained through hydrothermal reactions. The composition is determined through structure refinement, elemental analysis and X-ray photoelectron spectra. RbSbCl exhibits a broad yellow emission at 560 nm, with a Stokes shift of 175 nm and a photoluminescence quantum yield (PLQY) around 26%. RbSbCl also shows good thermal and water stability due to its inorganic composition. White light-emitting diodes (LEDs) are constructed by combining RbSbCl as yellow phosphors, our previously reported CsSnCl:2.75%Bi as blue phosphors, and commercial UV LED chips as the excitation source, producing a white light with the Commission Internationale de'Eclairage (CIE) color coordinates at (0.39, 0.38).