Lead-free Cs3Bi2Br9 and Cs3Bi2-xSbxBr9 nanocrystals as photocatalysts with enhanced activity for the degradation of rhodamine in aqueous environments

Lead‐Free Halide Perovskite Photocatalysts for Photocatalytic CO2 Reduction: A Review

“…Aragon et al studied the doping of metal Sb with Cs 3 Bi 2 Br 9 . [ 99 ] The synthesized Cs 3 Bi 2‐x Sb x Br 9 not only broadens the optical response range and inhibits the electron–hole pair recombination but also improves the electron transport capacity. Cui et al successfully synthesized lead‐free perovskite Cs 3 (Bi x Sb 1‐x ) 2 Br 9 photocatalysts.…”

Bandgap lowering in mixed alloys of Cs3Bi2−xSbxBr9 perovskite powders

“…In contrast, the good interlayer connectivity in the two-dimensional perovskite facilitates the interlayer charge transfer, leading to enhanced photoelectric performance. 13…”

“…In contrast, the good interlayer connectivity in the two-dimensional perovskite facilitates the interlayer charge transfer, leading to enhanced photoelectric performance. 13 The Cs 3 Bi 2 Br 9 perovskite has been used in many scenarios due to its appealing optoelectronic characteristics, such as outstanding structural stability, 2 low trap density, and extended diffusion length. 14,15 Cs 3 Bi 2 Br 9 as millimeter-sized single crystals, [15][16][17] heterostructures, 15 and nanosheets 18 have been reported, and it exhibits excellent performance in photocatalysis and photodetectors.…”

Boosting the Photoluminescence Quantum Yield and Stability of Lead-Free CsEuCl3 Nanocrystals via Ni2+ Doping

“…Lead-based halide perovskites have been extensively studied for their ease of synthesis, − long carrier diffusion length, , high monochromatic − and tunable spectra, − ,, high luminous efficiency, − , and high defect tolerance properties − that make them attractive candidates for wide color gamut displays, , but the toxicity of lead has been a major limitation, hindering their industrial application. While Sn 2+ and Ge 2+ have been considered to replace Pb 2+ , their susceptibility of easy oxidation leads to the decomposition of the perovskite structure. − Vacancy-ordered perovskites , (i.e., A 2 B 4+ X 6 , A 3 B 3+ 2 X 9 , etc.) and double perovskites − (i.e., A 2 B + B 3+ X 6 ) exhibit higher photoluminescence quantum yields (PLQYs), but their spectral widths are relatively wide due to the nature of self-trapped exciton (STE) emission.…”

“…While Sn 2+ and Ge 2+ have been considered to replace Pb 2+ , their susceptibility of easy oxidation leads to the decomposition of the perovskite structure. 16−20 Vacancy-ordered perovskites 21,22 (i.e., A 2 B 4+ X 6 , A 3 B 3+ 2 X 9 , etc.) and double perovskites 23−25 (i.e., A 2 B + B 3+ X 6 ) exhibit higher photoluminescence quantum yields (PLQYs), but their spectral widths are relatively wide due to the nature of self-trapped exciton (STE) emission.…”