CsPbBr3-DMSO merged perovskite micro-bricks for efficient X-ray detection

Abstract

Inorganic perovskite wafers with good stability and adjustable sizes are promising in X-ray detection but the high synthetic temperature is a hindrance. Herein, dimethyl sulfoxide (DMSO) is used to prepare the CsPbBr 3 micro-bricks powder at room temperature. The CsPbBr 3 powder has a cubic shape with few crystal defects, small charge trap density, and high crystallinity. A trace amount of DMSO attaches to the surface of the CsPbBr 3 micro-bricks via Pb-O bonding, forming the CsPbBr 3 -DMSO adduct. During hot isostatic processing, the released DMSO vapor merges the CsPbBr 3 micro-bricks, producing a compact and dense CsPbBr 3 wafer with minimized grain boundaries and excellent charge transport properties. The CsPbBr 3 wafer shows a large mobility-lifetime (μτ) product of 5.16 × 10 − 4 cm 2 ·V − 1 , high sensitivity of 14,430 μC·Gy air −1 ·cm −2 , low detection limit of 564 nGy air ·s −1 , as well as robust stability in X-ray detection. The results reveal a novel strategy with immense practical potential pertaining to high-contrast X-ray detection. Electronic Supplementary Material Supplementary material (further details of the characterization, SEM images, AFM images, KPFM images, schematic illustration, XRD patterns, XPS spectra, FTIR spectra, UPS spectra, and stability tests) is available in the online version of this article at 10.1007/s12274-023-5487-3.

Passivation of Organic–Inorganic Hybrid Perovskite with Poly(lactic Acid) to Achieve Stable Red-Light Flexible Films

“…This value is lower than the dose rate required for X-ray diagnosis (5.5 μGy s –1 ) . The detection limit of m PC-M@PLA thin film is comparable to the values reported recently for lead-based perovskites CsPbBr 3 -DMSO (564 n Gy s –1 ), CsPbBr 3 –CsPb 2 Br 5 (1.130 μGy s –1 ), and CsPbBr 3 @PMMA (0.12 μGy s –1 ) . A plastic capsule with a metal spring inside was first placed on the background of PC-M@PLA.…”

Amorphous Modulation of Atomic Nb‐O/N Clusters with Asymmetric Coordination in Carbon Shells for Advanced Sodium‐Ion Hybrid Capacitors

“…[26,36] N-doped carbon material favors sodiumion storage and charge transfer in the composite. [37][38][39] Meanwhile, Nb-O/N@C also exhibits obvious Nb-O-N bonds, [40,41] suggesting that the Nb-O clusters doped with N atoms may produce asymmetric coordination (Nb-O/N), which can further optimize the electronic structure of clusters. As for the O 1s spectra (Figure 2f), the presence of Nb-O bonds (530.5 eV) suggests that these materials contain niobium oxides.…”

Agar‐Derived Slope‐Dominated Carbon Anode with Puparium Like Nano‐Morphology for Cost‐Effective SIBs

“…In final, electrochemical impedance spectroscopy (EIS) was performed on the fresh cells aged 12 h assembled by HC and P-HC-2 electrodes, and the data are fitted to obtain value of fitted Rs (impedance of electrolyte solution) and Rct (charge transfer resistance) (Figure 4h and i) . [31,32] Compared with HC, P-HC-2 shows the smaller semicircle diameter, indicating a low charge transfer resistance at the electrolyte/electrode interface, due to the increased surface wettability by P doping. Besides, D Na+ also could be estimated by calculating the Warburg coefficient (𝜎, the slope of Z′ versus 𝜔 −1/2 ) , [31] and the more is 𝜎 value, the less is D Na+ .…”