Large-area flexible scintillator screen based on copper-based halides for sensitive and stable X-ray imaging

Duan, Ruiguang; Chen, Zhipeng; Xiang, Dandan; Si, Jinhao; Liu, Xiaomin

doi:10.1016/j.jlumin.2022.119482

Cited by 12 publications

(5 citation statements)

References 41 publications

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“…Large Stokes shift enhances light yield and scintillation performance. 44 We then measured their RL spectra under X-ray excitation (Figure 9a). The XPL peaks is also at ∼525 nm indicating that the same STE emission, and the XPL peak intensity of 2% doped NCs is the optimized.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Enhancing the Green Luminescence Efficiency and Stability of Cs₃Cu₂Cl₅ Nanocrystals by Na⁺ Substitutional Doping

Zhao,

Yu,

Liu

et al. 2023

ACS Appl. Nano Mater.

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Cesium halide copper compound semiconductors with a typical composition like Cs 3 Cu 2 X 5 have the advantages of nontoxicity and low cost, which show great potential for photoelectronic devices and biomedical applications. However, due to the valence variability of Cu + in Cs 3 Cu 2 X 5 and the inherent structural defects on the surface of nanocrystals (NCs), it has the shortcomings of easy oxidation and poor stability. Such instability is the main bottleneck limiting its application in a real environment. In this paper, the substitutional doping strategy with typical alkaline metal sodium (Na) was developed to greatly improve the photoluminescence quantum yield (PLQY) of Cs 3 Cu 2 X 5 NCs and the air stability of Cs 3 Cu 2 Cl 5 NCs. Detailed microstructure characterizations using X-ray diffraction, scanning transmission electron microscopy, and X-ray photoelectron spectroscopy indicated that Na + doping into the NCs effectively replaced the Cs + ion in the lattice, which can stabilize the Cu + chemical state by increasing the Cu−Cl bond energy and prevent the oxidation from Cu + to Cu 2+ . Substitutional Na doping also reduces defect-related nonradiative recombination and enhances the photocarrier recombination in the form of self-trapped excitons. The doped Cs 3 Cu 2 Cl 5 NCs exhibited an PLQY as high as 96% at the optimized doping concentration, which was due to the enhanced exciton−phonon coupling and reduced electron−phonon coupling as proved by the detailed PL spectroscopy analysis. In addition, such doped lead-free perovskite NCs also show higher X-ray excited emission efficiency and a more sensitive X-ray response, which further indicate their potential applications in medical imaging and photodynamic therapy for deep tumors.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…The absorption coefficient and attenuation capacity of Cs 3 Cu 2 Cl 5 are slightly lower than those of CsI and CdTe, but superior to Si that is widely used for commercial X-ray PIN or SDD detector. Large Stokes shift enhances light yield and scintillation performance . We then measured their RL spectra under X-ray excitation (Figure a).…”

Section: Resultsmentioning

confidence: 99%

Enhancing the Green Luminescence Efficiency and Stability of Cs₃Cu₂Cl₅ Nanocrystals by Na⁺ Substitutional Doping

Zhao,

Yu,

Liu

et al. 2023

ACS Appl. Nano Mater.

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“…23 The water resistance of scintillators is an essential prerequisite for its long-term and stable operation, which is a dilemma for some commercial scintillators (CsI:Tl) and perovskitebased scintillators. 24 Compound 1 retained its structural stability, and showed almost unanimous X-ray responsive scintillation sensitivities after being immersed in water for 30 d, demonstrating excellent water tolerance (Fig. 3a, b and Fig.…”

Section: X-ray Scintillation Propertiesmentioning

confidence: 94%

Flexible strontium-based metal–organic framework scintillation screens for high-resolution X-ray imaging

Wang,

et al. 2023

Inorg. Chem. Front.

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“…As we discussed in above sections, a broad range of TCHs demonstrate attractive characters for optoelectronic devices. [216][217][218][219][220][221][222][223][224][225][226][227][228][229][230][231][232][233] Although the most efficient devices still employ lead-containing perovskites, the issue of lead-toxic is driving the development of novel TCHs. In this section, we will discuss the potential optoelectronic devices based on the newly-emerging TCHs, focusing on the phosphor-converted WLEDs, electroluminescent LEDs, anti-counterfeiting, X-ray scintillators, photodetectors, sensors, and memristors.…”

Section: Optoelectronic Applications Of Tchsmentioning

confidence: 99%

Recent Advances and Opportunities of Eco‐Friendly Ternary Copper Halides: A New Superstar in Optoelectronic Applications

Lin

et al. 2023

Advanced Materials

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Recently, the newly‐emerging lead‐free metal‐halide materials with less toxicity and superior optoelectronic properties have received wide attention as the safer and potentially more robust alternatives to lead‐based perovskite counterparts. Among them, ternary copper halides (TCHs) have become a vital group due to their unique features, including abundant structural diversity, ease of synthesis, unprecedented optoelectronic properties, high abundance, and low cost. Although the recent efforts in this field have made certain progresses, some scientific and technological issues still remain unresolved. Herein, a comprehensive and up‐to‐date overview of recent progress on the fundamental characteristics of TCH materials and their versatile applications is presented, which contains topics such as: i) crystal and electronic structure features and synthesis strategies; ii) mechanisms of self‐trapped excitons, luminescence regulation, and environmental stability; and iii) their burgeoning optoelectronic devices of phosphor‐converted white light‐emitting diodes (WLEDs), electroluminescent LEDs, anti‐counterfeiting, X‐ray scintillators, photodetectors, sensors, and memristors. Finally, the current challenges together with future perspectives on the development of TCH materials and applications are also critically described, which is considered to be critical for accelerating the commercialization of these rapidly evolving technologies.

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Large-area flexible scintillator screen based on copper-based halides for sensitive and stable X-ray imaging

Cited by 12 publications

References 41 publications

Enhancing the Green Luminescence Efficiency and Stability of Cs₃Cu₂Cl₅ Nanocrystals by Na⁺ Substitutional Doping

Enhancing the Green Luminescence Efficiency and Stability of Cs₃Cu₂Cl₅ Nanocrystals by Na⁺ Substitutional Doping

Flexible strontium-based metal–organic framework scintillation screens for high-resolution X-ray imaging

Recent Advances and Opportunities of Eco‐Friendly Ternary Copper Halides: A New Superstar in Optoelectronic Applications

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Large-area flexible scintillator screen based on copper-based halides for sensitive and stable X-ray imaging

Cited by 12 publications

References 41 publications

Enhancing the Green Luminescence Efficiency and Stability of Cs3Cu2Cl5 Nanocrystals by Na+ Substitutional Doping

Enhancing the Green Luminescence Efficiency and Stability of Cs3Cu2Cl5 Nanocrystals by Na+ Substitutional Doping

Flexible strontium-based metal–organic framework scintillation screens for high-resolution X-ray imaging

Recent Advances and Opportunities of Eco‐Friendly Ternary Copper Halides: A New Superstar in Optoelectronic Applications

Contact Info

Product

Resources

About

Enhancing the Green Luminescence Efficiency and Stability of Cs₃Cu₂Cl₅ Nanocrystals by Na⁺ Substitutional Doping

Enhancing the Green Luminescence Efficiency and Stability of Cs₃Cu₂Cl₅ Nanocrystals by Na⁺ Substitutional Doping