Gd2O3:Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors

Oliveira, Juliana T.; Martins, Pedro M.; Correia, V.; Rocha, J. G.; Lanceros‐Méndez, S.

doi:10.1007/s00339-015-9435-2

Cited by 21 publications

(18 citation statements)

References 27 publications

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“…Figure 1a shows that the optical transmittance of the samples as a function of wavelength decrease with increasing scintillator filler content, as increasing filler concentration leads to light dispersion and decreased optical transparency of the films. The main emission peak of the Gd2O3:Eu 3+ is observed at ≈ 611 nm and is related to the red emission transition of Eu 3+ under X-ray radiation [15,22]. Figure 2b shows the optical transmittance as a function of Gd2O3:Eu 3+ content, at a wavelength of 611nm.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 2b shows the optical transmittance as a function of Gd2O3:Eu 3+ content, at a wavelength of 611nm. The transmittance at ≈ 611 nm suffers a decrease with increasing of scintillator nanoparticle content due to increased light dispersion [22] which leads to the decrease of the composites transmittance from 85% for the pristine polymer to around 65% for the higher filler concentrations.…”

Section: Resultsmentioning

confidence: 99%

“…The electronic circuit is powered by a battery, and the voltage is regulated using the switching step-down regulator LM2596 from Texas Instruments, allowing the system to be fully remote. Details on the developed set-up can be found in [22].…”

Section: Sample Characterization and Scintillator Composite Performance Evaluationmentioning

confidence: 99%

“…Due to their atomic number, wide band gap (~5.2 eV), , high density (~7.4 g cm -3 ), proper light yield (~2×10 4 photons.M eV -1 ) and radioluminescence [21], Gd2O3:Eu 3+ nanoparticles were selected as scintillators. Further, the overall visible light output in the Xray to electrical conversion process was improved by incorporating the fluorescence molecules PPO and POPOP [22].…”

Section: Introductionmentioning

confidence: 99%

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Stretchable scintillator composites for indirect X-ray detectors

Oliveira

Correia

Francesko

et al. 2018

Composites Part B: Engineering

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Flexible and stretchable materials are increasingly being investigated for future technological platforms, polymer based materials being the most suitable candidates for those emerging technologies. This work reports on polymer based scintillator composites based on the thermoplastic elastomer Styrene-Ethylene/Butadiene-Styrene (SEBS) and Gd2O3:Eu 3+ scintillator nanoparticles, to form a polymer-based flexible and stretchable material for X-ray indirect detectors. Further, visible light yield under X-ray irradiation was improved by the inclusion of 2,5 dipheniloxazol (PPO) and (1,4-bis (2-(5-phenioxazolil))-benzol (POPOP) within the polymer matrix. Together with high levels of stretchability, with deformations up to 100%, the films exhibit suitable performance with low mechanical hysteresis (less than 1.5 MJ/m 3 for cycles up to 100% of strain) and reproducibly such as a scintillator material for the conversion of X-ray radiation into visible radiation. The decrease of just ~13% of the X-ray radiation into visible light upon stretching up to 100% is attributed to a reduction of the effective filler concentration and proves the suitability of the developed materials for large area and stretchable X-ray radiation detectors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Sample Characterization and Scintillator Composite Performance Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stretchable scintillator composites for indirect X-ray detectors

Oliveira

Correia

Francesko

et al. 2018

Composites Part B: Engineering

Self Cite

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“…The performance of the printed photodetector under X-ray radiation with and without the printed scintillator layer was measured by subjecting the samples to the X-ray radiation produced by a Bruker D8 Discover diffractometer using Cu Kα incident radiation (wavelength of 1.54056 angstroms) and powered with a voltage of 40 kV and a current ranging from 0 to 40 mA (output power changes from 0 to 1600 W). The efficiency of the X-ray to visible conversion was evaluated with an electronic measurement system that allows to quantify the emitted visible wavelength radiation, as described in 35 .…”

Section: Characterization Of the Printed Photodetectorsmentioning

confidence: 99%

Indirect X-ray Detectors Based on Inkjet-Printed Photodetectors with a Screen-Printed Scintillator Layer

Oliveira

Correia

Sowade

et al. 2018

ACS Appl. Mater. Interfaces

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Organic photodetectors (PDs) based on printing technologies will allow to expand the current field of PD applications toward large-area and flexible applications in areas such as medical imaging, security, and quality control, among others. Inkjet printing is a powerful digital tool for the deposition of smart and functional materials on various substrates, allowing the development of electronic devices such as PDs on various substrates. In this work, inkjet-printed PD arrays, based on the organic thin-film transistor architecture, have been developed and applied for the indirect detection of X-ray radiation using a scintillator ink as an X-ray absorber. The >90% increase of the photocurrent of the PDs under X-ray radiation, from about 53 nA without the scintillator film to about 102 nA with the scintillator located on top of the PD, proves the suitability of the developed printed device for X-ray detection applications.

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Molecular Sensitization Enabled High Performance Organic Metal Halide Hybrid Scintillator

Shonde

Chaaban

et al. 2023

Advanced Materials

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Scintillators, one of the essential components in medical imaging and security checking devices, rely heavily on rare‐earth‐containing inorganic materials. Here, a new type of organic‐inorganic hybrid scintillators containing earth abundant elements that can be prepared via low‐temperature processes is reported. With room temperature co‐crystallization of an aggregation‐induced emission (AIE) organic halide, 4‐(4‐(diphenylamino) phenyl)‐1‐(propyl)‐pyrindin‐1ium bromide (TPA‐PBr), and a metal halide, zinc bromide (ZnBr2), a zero‐dimensional (0D) organic metal halide hybrid (TPA‐P)2ZnBr4 with a yellowish‐green emission peaked at 550 nm has been developed. In this hybrid material, dramatically enhanced X‐ray scintillation of TPA‐P+ is achieved via the sensitization by ZnBr42−. The absolute light yield (14,700 ± 800 Photons/MeV) of (TPA‐P)2ZnBr4 is found to be higher than that of anthracene (≈13,500 Photons/MeV), a well‐known organic scintillator, while its X‐ray absorption is comparable to those of inorganic scintillators. With TPA‐P+ as an emitting center, short photoluminescence and radioluminescence decay lifetimes of 3.56 and 9.96 ns have been achieved. Taking the advantages of high X‐ray absorption of metal halides and efficient radioluminescence with short decay lifetimes of organic cations, the material design paves a new pathway to address the issues of low X‐ray absorption of organic scintillators and long decay lifetimes of inorganic scintillators simultaneously.

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Gd2O3:Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors

Cited by 21 publications

References 27 publications

Stretchable scintillator composites for indirect X-ray detectors

Stretchable scintillator composites for indirect X-ray detectors

Indirect X-ray Detectors Based on Inkjet-Printed Photodetectors with a Screen-Printed Scintillator Layer

Molecular Sensitization Enabled High Performance Organic Metal Halide Hybrid Scintillator

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