Effect of commensurate lithium doping on the scintillation of two-dimensional perovskite crystals

Maddalena, Francesco; Xie, Aozhen; Arramel, Arramel; Witkowski, Marcin E.; Makowski, Michał; Mahler, Benoît; Drozdowski, Winicjusz; Thambidurai, M.; Springham, S. V.; Coquet, Philippe; Dujardin, Christophe; Birowosuto, Muhammad Danang; Dang, Cuong

doi:10.1039/d0tc05647b

Cited by 58 publications

(101 citation statements)

References 39 publications

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“…In contrast, CsPbBr 3 NCs show a more complex behavior, including negative thermal quenching (NTQ), that is, the phenomenon, where luminescence increases with temperature, which has been observed in other low-dimensional perovskites. 23,25 The XL of CsPbBr 3 NCs decreases as the temperature is increased from 10 to 160 K. Above 160 K, the XL intensity increases again, showing an NTQ behavior, reaching a maximum at 230 K before decreasing again.…”

Section: Resultsmentioning

confidence: 99%

Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals

Maddalena

Xie

Chin³

et al. 2021

J. Phys. Chem. C

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Lead halide perovskite (LHP) nanocrystals (NCs) have recently attracted attention due to both their high quantum yield and their potential for X-ray imaging applications. In this paper, we investigated the scintillation properties of three different LHP NCs; CsPbBr 3 , FAPbBr 3 , and CsPbI 3 . The featured NCs exhibited high X-ray excited luminescence (XL) at cryogenic temperatures. While FAPbBr 3 and CsPbI 3 NCs display thermal quenching, CsPbBr 3 NCs show negative thermal quenching and high XL at high temperatures, with a light yield of 24,000 ± 2,100 photons/MeV at 300 K. The LHP NCs exhibit a small afterglow and low trap density and exhibit a very fast XL decay time, under 20 ns, faster than those of some currently used commercial scintillators. Overall, CsPbBr 3 NCs are the best performing materials investigated here, making them particularly attractive for fast-timing applications such as positron emission tomography or particle detectors in high-energy physics. In the end, we demonstrate the proof of concept for using a CsPbBr 3 NC matrix for imaging applications and the flexibility of NCs for developing microstructure scintillators.

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Section: Resultsmentioning

confidence: 99%

Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals

Maddalena

Xie

Chin³

et al. 2021

J. Phys. Chem. C

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“…The measurement was performed using a pulsing X-ray source, where the source was turned on and held constant for 120 s and then switched off for 120 s. At low power (V = 15−20 kV and I = 6 mA), sometimes decay is not observed at all, particularly at T = 15 K. The CsPbBr 3 QD-resin sheets at a 50 wt % QD concentration do not show any decay until high power is used (V = 40−45 kV, I = 10 mA). We fitted the decay of the XL, similarly to a previous work 32 and as shown in Supporting Figure S11, at a high irradiation power (I = 10 mA and V = 45 kV), and reported the result in Supporting Table S6. From the obtained results, we note that the higher 50 wt % concentration of CsPbBr 3 QDs appears to be overall more stable than the 15 wt % at low temperatures or under low irradiation power and show similar stability under high irradiation power.…”

Section: Resultsmentioning

confidence: 93%

Stable and Bright Commercial CsPbBr₃ Quantum Dot-Resin Layers for Apparent X-ray Imaging Screen

Maddalena

Witkowski

Makowski

et al. 2021

ACS Appl. Mater. Interfaces

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CsPbBr3 quantum dots (QDs) have recently gained much interest due to their excellent optical and scintillation properties and their potential for X-ray imaging applications. In this study, we blended CsPbBr3 QDs with resin at different QD concentrations to achieve thick films and to protect the CsPbBr3 QDs from environmental moisture. Then, their scintillation properties are investigated and compared to the traditional commercial scintillators, CsI:Tl microcolumns, and Gadox layers. The CsPbBr3 QD-resin sheets show a high light yield of up to 21 500 photons/MeV at room temperature and a relatively small variation in light yield across a wide temperature range. In addition, the CsPbBr3 QD-resin sheets feature a small scintillation afterglow. The CsPbBr3 QD-resin sheets show a negligible trap density for the concentration below 50% weight, indicating that traps might arise from the aggregation of the QDs. The CsPbBr3 QD-resin sheets are also very stable at low irradiation intensities and relatively stable at higher intensities, with higher CsPbBr3 QD concentrations being more stable. Gamma-ray-excited-time-resolved emission measurements at 662 keV showed that the CsPbBr3 QD-resin sheets have an average scintillation decay time between 108 and 176 ns, which are still 10 000 and 6000 times faster than CsI:Tl and Gadox, respectively. Imaging tests show that the CsPbBr3 QD-resin sheets have a mean transfer function of 50% at 2 lp/mm and 20% at 4 lp/mm, comparable to that of commercial Gadox layers. This feature makes CsPbBr3 QD-resin sheets a good candidate for the low-cost, flexible X-ray imaging screens and γ-ray applications.

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“…[41] 2D perovskite with natural quantum well structure typically exhibits a compromised combination of excellent performance in chemical stability, physical flexibility, and optical property, which has been supposed to be a promising candidate for optoelectronics and radiation detection applications. [41][42][43][44][45] Herein, a series of 2D BA 2 PbBr 4 perovskite with variable Mn (II) doping concentration were synthesized by facile solution-processing and solid-state reaction at low temperature. Appropriate modulation of the Mn (II) doping concentration can markedly enhanced the X-ray scintillation light yield via efficient energy transfer.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Flexible Scintillation Screen Based on Manganese (II) Activated 2D Perovskite for Planar and Nonplanar High‐Resolution X‐Ray Imaging

Shao

Wang

Zhang

et al. 2022

Advanced Optical Materials

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power. [1] X-ray detection technology, as a derivative of its own special properties, plays a key role in multiple applications, including medical radiography, safety surveillance, industrial flaw inspection, and scientific research. [2][3][4] Especially for the global pandemic of Corona Virus Disease 2019, X-ray radiograph and computed tomography scan were employed as rapid and accurate autodetection methods to reveal abnormal lung indications for disease diagnosis. [5] Modern X-ray detectors with the advantages of digital image processing, massive storage capability, data sharing have almost replaced the traditional film-based detectors. Currently, two available schemes were adopted for X-ray detection: direct-detection based on semiconductor materials operating in currentto-current mode, [6][7][8] and indirect-detection based on scintillators working in photonto-current mode. [9][10][11][12][13][14][15][16][17][18] Indirect-detection type X-ray detectors occupy the majority of the market share because of their relatively low-cost and stability. [11,16] As the core component of the detector, scintillator is capable of converting X-ray into ultraviolet (UV)/visible light that can be collected by a sensor array (such as photomultiplier tube, [14] multipixel photon counter, [15] charge-coupled device, [16] and complementary metal-oxide-semiconductor). [17,18] Development over the decades has witnessed the emergence of various scintillators, which were classified according to their own characteristics to fit the demands of different occasions. Yet several issues and limitations still remain. For example, needle-like column CsI (Tl) crystals were commonly used as mainstream products in X-ray imaging applications, due to their large X-ray conversion efficiency, high light yield, and low light-crosstalk. [19,20] Their limitation lies in the high-cost caused by the complicated and time-consuming vacuum fabrication procedures. [21,22] Plastic scintillators, consisting of embedded or coated with scintillation materials, have the advantages of mechanical plasticity, fast decay time, and remarkable radiation resistance. They may seem to be economical alternatives to conventional inorganic scintillation crystals. [23,24] However, they are plagued by relatively low density, weak radioluminescence (RL) emission and poor thermal stability. Since the wide range X-ray imaging technology covers a wide range of applications in the medical, industrial, and scientific research fields. Highly sensitive, flexible, and cost-effective scintillation screens are of great importance for X-ray imaging applications. In this paper, manganese (II) activated 2D butylammonium lead bromide perovskite, namely BA 2 PbBr 4 :Mn (II), is demonstrated as a highly efficient and low-cost X-ray scintillator. The appropriate amount of Mn (II) dopant can act as an activator for achieving the optimization of luminescence performance through efficient energy transfer. This produces a large Stokes shift thus almost eliminates the effect of self-absorption. As ...

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Effect of commensurate lithium doping on the scintillation of two-dimensional perovskite crystals

Abstract: Commensurate Lithium doping of two-dimensional lead halide perovskites leads to improved scintillation properties, with enhanced light yield, narrower energy resolution, higher radiation hardness and faster scintillation decay.

Cited by 58 publications

References 39 publications

Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals

Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals

Stable and Bright Commercial CsPbBr₃ Quantum Dot-Resin Layers for Apparent X-ray Imaging Screen

Highly Efficient and Flexible Scintillation Screen Based on Manganese (II) Activated 2D Perovskite for Planar and Nonplanar High‐Resolution X‐Ray Imaging

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Effect of commensurate lithium doping on the scintillation of two-dimensional perovskite crystals

Abstract: Commensurate Lithium doping of two-dimensional lead halide perovskites leads to improved scintillation properties, with enhanced light yield, narrower energy resolution, higher radiation hardness and faster scintillation decay.

Cited by 58 publications

References 39 publications

Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals

Deterministic Light Yield, Fast Scintillation, and Microcolumn Structures in Lead Halide Perovskite Nanocrystals

Stable and Bright Commercial CsPbBr3 Quantum Dot-Resin Layers for Apparent X-ray Imaging Screen

Highly Efficient and Flexible Scintillation Screen Based on Manganese (II) Activated 2D Perovskite for Planar and Nonplanar High‐Resolution X‐Ray Imaging

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Product

Resources

About

Stable and Bright Commercial CsPbBr₃ Quantum Dot-Resin Layers for Apparent X-ray Imaging Screen