Orange/cyan emissive sensors of Sb³⁺ for probing water via reversible phase transformation in rare-earth-based perovskite crystals

Abstract

A facile strategy for water probing with visible perception is of particular importance to water transport, ecosystem sustainability, and the ocean industry. Here, we have developed a simple technology to...

Enhancing Luminescence in Hue-Tunable White-Light Emitting K4CdCl6:Sb3+,Mn2+ All-Inorganic Halide Perovskites: Insights from Defect Engineering and Energy Transfer

“…Thus, it is reasonable to conclude that the broadband luminescence in the cyan region is attributed to the s-p transition of Sb 3+ rather than the STEs emission, which is quite different from the luminescence mechanism of Sb 3+ in Rb 4 CdCl 6 , Rb 3 ScCl 6 , and Rb 2 ScCl 5 •H 2 O crystals. 7,34 This mechanism K 4 CdCl 6 :Sb 3+ ,Mn 2+ is distinct from STEs emission, which typically involves electron trapping and recombination processes within the crystal structure itself. The specific energy levels and electronic configurations of Sb 3+ in the K 4 CdCl 6 :Sb 3+ ,Mn 2+ crystal enable s−p transitions as the dominant luminescence mechanism.…”

Enhanced Efficiency, Broadened Excitation, and Tailored Er3+ Luminescence Triggered by Te4+ Codoping in Cs2NaYbCl6 Crystals for Multifunctional Applications

“…Rare earth-based AIHPs with unique crystal structures are considered as promising candidates to produce efficient photoluminescence (PL) materials. − The codoping of different ions in the AIHPs lattice makes them ideal candidates for tuning and enhancing the luminescence efficiency of rare earth ions. − Through sensitization by the Te 4+ , an intense and multiwavelength NIR luminescence originating from the 4f–4f transitions of Er 3+ , Nd 3+ , and Yb 3+ has been acquired in perovskite Cs 2 ZrCl 6 which shows potential applications such as NIR-LEDs and bioimaging . The zero-dimensional perovskite crystal Cs 3 TbF 6 :Eu 3+ experienced ultrafast (20 ms) phase transformation into CsTb 2 F 7 , which triggers a switchable emission color change from green to orange upon water exposure .…”

A thermally induced fluorescence enhancement strategy for efficient all-inorganic rubidium manganese halide

“…4,5 Considering the intrinsic instability and toxicity of lead-based metal halides in practical applications, many efforts have been devoted to exploring environmentally friendly metal halides with outstanding properties. 6,7 Owing to structural diversity and rich elements, metal halides based on Sn 2+ , 8,9 Bi 3+ , 10,11 Sb 3+ , 12,13 In 3+ , 14,15 Cu + , 16,17 and Ag + /In 3+ ions 18 are regarded as ideal alternatives due to the attractive features of self-trapped excitons. For instance, CsCu 2 I 3 with a blue emission at 446 nm (full width at half-maximum (FWHM) of 85 nm) and Cs 3 Cu 2 I 5 with a yellow emission at 550 nm (FWHM of 115 nm) served as emitters to fabricate white LED devices, achieving a high color-rendering index (CRI) of 91.6.…”