Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158656 - 158656
Published: Dec. 1, 2024
Language: Английский
Materials Science in Semiconductor Processing, Journal Year: 2025, Volume and Issue: 189, P. 109296 - 109296
Published: Jan. 19, 2025
Language: Английский
Citations
1
Published: Jan. 1, 2025
Language: Английский
Citations
0
Inorganics, Journal Year: 2025, Volume and Issue: 13(3), P. 83 - 83
Published: March 13, 2025
In this study, the luminescence efficiency of a crystal-form barium fluoride (BaF2) inorganic scintillator was assessed for medical imaging applications. For experiments, we used typical X-ray tube (50–140 kVp) estimating absolute (AE). Furthermore, examined spectral matching with series optical detectors. BaF2 showed higher AE than cerium (CeF3), comparable to that commercially available bismuth germanate (Bi4Ge3O12-BGO), but lower gadolinium orthosilicate (Gd2SiO5:Ce-GSO:Ce) scintillator. The maximum 2.36 units (EU is S.I. equivalent μWm−2/(mR/s) at 140 kVp, which corresponding fluoride-based CeF3 (0.8334 EU)) same energy. GSO:Ce and BGO crystals, are often integrated in commercial positron emission tomography (PET) scanners, had values 7.76 3.41, respectively. (~310 nm) adequate coupling flat-panel position-sensitive (PS) photomultipliers (PMTs) various photocathodes. results were those BGO; thus, it could possibly be modalities, considering its significantly cost.
Language: Английский
Citations
0
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 21, 2025
Abstract Large‐area perovskite (PVK) X‐ray detectors exhibit significant potential for commercial applications. However, the production of uniform and dense thick films as well achieving efficient carrier transport over tens microns in PVK films, remain major challenges highly sensitive detection. Herein, an innovative vacuum‐assisted blade coating strategy is proposed using inks that strictly controls nucleation growth PVKs to prepare large‐area, high‐quality MAPbI 3 homojunction films. Arising from formation a type II between top bottom layers, effective reduction density defect states, resultant film exhibits impressive performances, including increase lifetime 1272 9335 ps, surface photovoltage change 93 386 mV, nearly three times higher mobility‐lifetime product compared with pristine NMP‐PVK film. Consequently, detector based on demonstrates high sensitivity 1.3 × 10 5 µC Gy air −1 cm −2 , surpassing most previously reported values method. This research provides convenient approach preparing large‐area establishes solid foundation development
Language: Английский
Citations
0
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: April 8, 2025
Low-dimensional lead-free perovskite single crystals (SCs) have exhibited great potential in high-energy ionizing radiation detections owing to their outstanding sensitivity and charge transport properties. However, the preparation of chlorine-based SCs is more challenging due low solubility organic solvents acidic solutions. In this work, we report a universal growth strategy hydrochloric acid-assisted temperature lowering for low-dimensional layered CsMnCl3·2H2O SCs. Compared with prepared by solution evaporation crystallization, centimeter-sized were achieved ultrahigh crystal quality, showing very small full width at half-maximum 0.02° plane (002). Our CsMnCl3 2H2O X-ray detector shows unique anisotropic detecting performance parallel perpendicular (002) plane. An ultralow detection limit 9.3 nGyair s-1 has been obtained, which significantly lower than 5.5 μGyair required regular medical diagnostics. Furthermore, device enhanced stability slight degradation 8% after storage air ambient 6 months. work suggests promising approach fabricate high-quality sensitive stable applications.
Language: Английский
Citations
0
Materials, Journal Year: 2025, Volume and Issue: 18(9), P. 1904 - 1904
Published: April 23, 2025
Amorphous lead oxide (a-PbO) X-ray photoconductors show potential for applications in direct conversion medical imaging detectors within the diagnostic energy range. a-PbO enables large-area deposition at low temperatures and exhibits no signal lag. Low dark current can be maintained through specialized blocking layers, similar to those used multilayer amorphous selenium (a-Se) structures commercial detectors. However, state of technology faces challenges thick layer deposition, leading crystalline inclusions cracks. Our proposed stress-induced crystallization model reveals that intrinsic stress layers amplifies with thickness, crystallographic defects. These defects, which are associated stable phase β-PbO, contribute increased initiate cracking. We calculate thermal expansion coefficient a-PbO, indicating a thermomechanical mismatch between photoconductor substrate as primary source stress. Furthermore, we demonstrate parameters significantly impact heat accumulation growing layer, thereby facilitating temperature-induced crystallization. study suggests relieving grown by eliminating mismatches different structures, coupled optimizing prevent during growth, may inhibit or even emergence structural defects layers.
Language: Английский
Citations
0
Advanced Materials Technologies, Journal Year: 2025, Volume and Issue: unknown
Published: May 14, 2025
Abstract Solution‐grown metal halide perovskite single crystals (MHP SCs) hold significant promise for applications in photodetection and high‐energy radiation detection. However, the detection performance long‐term operational durability of single‐crystal detectors are hindered by surface defects. Conventional mechanical grinding polishing methods time‐consuming labor‐intensive, inevitably pose potential risks related to environmental pollution. In this work, a multiple solvent‐based engineering strategy is proposed mitigate these issues. By utilizing 1‐octadecene buffer layer 1‐ethyl‐3‐methylimidazolium bromide (EMIMBr) ionic liquid passivation agent, morphology effectively improved defects MAPbBr 3 (MPB passivated. The treated MPB SCs demonstrate substantial increase photoluminescence intensity, nearly five times greater than that untreated samples, along with prolonged PL lifetime. photodetectors based on exhibit suppressed dark current 13.5 nA at bias 1 V, response speed. Notably, after 110 days, unencapsulated devices maintain reliable performance. Benefiting from leakage noise, planar an Au/MPB SCs/Au device structure distinct 241 [email protected] MeV alpha particles room temperature.
Language: Английский
Citations
0
ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2770 - 2777
Published: May 15, 2025
Language: Английский
Citations
0
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(46), P. 31836 - 31848
Published: Nov. 6, 2024
All-inorganic CsPbBr
Language: Английский
Citations
3
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 17, 2024
Cutting-edge techniques utilizing continuous films made from pure, novel semiconductive materials offer promising pathways to achieve high performance and cost-effectiveness for X-ray detection. Semiconductive metal-organic framework (MOF) glass are known their remarkably smooth surface morphology, straightforward synthesis, capability large-area fabrication, presenting a new direction high-performance detectors. Here, material centered on MOF glasses highly uniform film fabrication customized detection is introduced. glasses, composed of zinc imidazole derivatives, enable the transition solid liquid at low temperatures, facilitating preparation with mobility device fabrication. Remarkably, detectors demonstrate an exceptional sensitivity 112.8 µC Gy
Language: Английский
Citations
2