Nanocomposite scintillation perovskite-delignified wood photonic guides for X-ray imaging

Advances in Perovskite Nanocrystals and Nanocomposites for Scintillation Applications

“…96 On the other hand, the optical and scintillation performances are strongly dependent on the synthetic routes for the PNCs' preparation, retaining both PLQY and LY values both for pristine and F-treated CsPbBr 3 PNCs (Figure 9h) up to 1 MGy dose of 60 Co γ-rays. More recently also Ostrikov and coworkers 228,229 reported on 60 Co γ-rays stability of CsPbBr 3 PNCs showing 90% retention of RL intensity up to 319 kGy (Figure 9i). The origin of such resistance to radiation damage in PNCs is still debated, whereas in bulk perovskites selfhealing processes have been observed under proton, 92 soft Xray, 230 and γ-ray 231 irradiation, showing that the ionic lattice mobility in LHP prompts the recycle of the degradation byproducts trapped in the crystal and results in a complete recovery of the optoelectronic properties.…”

“…This has been achieved by Yang et al on specifically surface treated CsPbBr 3 PNCs, demonstrating RL intensity stability in PNCs up to 42 kGy dose of 60 Co γ-rays (at a dose rate of 0.45 kGy h –1 ). A different aspect of radiation hardness is that of high-energy particle colliders and nuclear reactors, where the doses involved are up to 5 or 6 orders of magnitude higher than in X-ray imaging and typically exceed the extreme dose of 1 MGy. , To date, only a few studies have directly addressed radiation hardness in PNCs above 10 5 Gy, mainly from Brovelli and co-workers ,, and from Ostrikov and co-workers , using 60 Co γ-rays. In particular, it has been shown that radiation hardness is an intrinsic property of PNCs, regardless of whether they are synthesized by HI or by LARP techniques, , and that this property is retained when they are embedded in polyacrylate nanocomposites (Figure c,d) obtained by solvent evaporation or by UV-initiated free-radical polymerization (Figure e).…”

All-inorganic copper-halide perovskites for large-Stokes shift and ten-nanosecond-emission scintillators

“…75 Perovskite scintillators in powder form exhibit faster X-ray or scintillation decay times compared to their single crystal or thin film counterparts primarily due to their increased surface area and defect levels. 76,77 The powder form allows for more efficient energy transfer and quicker electron–hole recombination. 78,79 Furthermore, we observed incremental changes in the decay time for the 0D system, where the contribution of τ 3 varied from 387.15 ± 6.05 ns (27%) for CsCu 2 I 3 to 924.85 ± 4.05 (90%) for Cs 3 Cu 2 I 5 .…”