Antimony Doping Enabled Photoluminescence Quantum Yield Enhancement in 0D Inorganic Bismuth Halide Crystals

Yellow-Orange Emission in Sb3+-Doped Hexakis(thiocarbamidium) Hexabromoindium(III) Tribromide

“…There are disagreements in the interpretation of these bands in the PLE spectrum of In 3+ -based hexabromides without doping. ,,,, On the one hand, these excitation bands at 324–326 nm and 362–365 nm can be attributed to parity-forbidden exciton transitions in isolated [InBr 6 ] 3– , like the band at 380 in the absorption spectrum, or even associated with the 1 S 0 → 1 P 1 and 1 S 0 → 3 P 1 transitions of In 3+ ions, which seems not entirely correct to us. On the other hand, such bands in the PLE spectrum (Figure b) are characteristic specifically of ns 2 ions, for example, Sb 3+ ,, or Bi 3+ . , Many researchers point out that the presence of Sb as a native impurity in In-based halides is responsible for their luminescent properties ,, since materials based on pure In 3+ either do not emit or emit very weakly ,,,,− due to the parity-forbidden transitions of In 3+ . Based on the latter, we can assume that the PLE spectrum of both undoped and Sb 3+ -doped (TUH) 6 [In 1– x Sb x Br 6 ]­Br 3 powders in the range of 290–450 nm, by monitoring at 600 nm, exhibits bands characteristic of the spin-forbidden 1 S 0 → 3 P 1 transition of the Sb 3+ ions, which is possible due to the strong spin–orbital coupling for heavy atoms.…”

Band gap engineering and photoluminescence tuning in halide double perovskites

“…Bright orange emission at 628 nm was reported in Sb 3+ doped Rb 3 BiCl 6 ·0.5H 2 O. 69 In contrast, the introduction of Sb 3+ into the Cs 2 Na(Bi, Sb)Cl 6 structure resulted in a PL peak in the blue-green region (480 nm), while the pristine host material emits orange-red light with a peak at 700 nm. 70 In Cs 2 MInCl 6 : x Sb 3+ , the emission color changes from blue to green for M = Na and M = K, respectively.…”