Metal Halide Perovskites for X-ray Imaging Scintillators and Detectors

ACS Energy Letters, Год журнала: 2021, Номер 6(2), С. 739 - 768

Опубликована: Янв. 29, 2021

Radiation detection, using materials to convert high-energy photons low-energy (X-ray imaging) or electrical charges detector), has become essential for a wide range of applications including medical diagnostic technologies, computed tomography, quality inspection and security, etc. Metal halide perovskite-based high-resolution scintillation-imaging screens direct conversion detectors are promising candidates such applications, because they have high absorption cross sections X-rays due their heavy atom (e.g., Pb2+, Bi3+, I–) compositions; moreover, these solution-processable at low temperature, possessing tunable bandgaps, near-unity photoluminescence quantum yields, trap density, charge carrier mobility, fast photoresponse. In this review, we explore decipher the working mechanism scintillators as well key advantages perovskites both detection approaches. We further discuss recent advancements in research area, pointing out remaining challenges our perspective future directions toward X-ray applications.

Язык: Английский

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Recent progress of zero-dimensional luminescent metal halides

Chemical Society Reviews, Год журнала: 2021, Номер 50(4), С. 2626 - 2662

Опубликована: Янв. 1, 2021

This review provides in-depth insight into the structure–luminescence–application relationship of 0D all-inorganic/organic–inorganic hybrid metal halide luminescent materials.

Язык: Английский

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Highly efficient eco-friendly X-ray scintillators based on an organic manganese halide

Nature Communications, Год журнала: 2020, Номер 11(1)

Опубликована: Авг. 28, 2020

Scintillation based X-ray detection has received great attention for its application in a wide range of areas from security to healthcare. Here, we report highly efficient scintillators with state-of-the-art performance on an organic metal halide, ethylenebis-triphenylphosphonium manganese (II) bromide ((C

Язык: Английский

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Efficient and Reabsorption‐Free Radioluminescence in Cs₃Cu₂I₅ Nanocrystals with Self‐Trapped Excitons

Advanced Science, Год журнала: 2020, Номер 7(11)

Опубликована: Апрель 16, 2020

Radioluminescent materials (scintillators) are widely applied in medical imaging, nondestructive testing, security inspection, nuclear and radiation industries, scientific research. Recently, all-inorganic lead halide perovskite nanocrystal (NC) scintillators have attracted great attention due to their facile solution processability ultrasensitive X-ray detection, which allows for large area flexible imaging. However, the light yield of these NCs is relatively low because strong self-absorption that reduces out-coupling efficiency. Here, with self-trapped excitons emission demonstrated be sensitive, reabsorption-free scintillators. Highly luminescent stable Cs3Cu2I5 a photoluminescence quantum yields 73.7%, new record blue lead-free or perovskite-like NCs, produced assistance InI3. The PL peak locates at 445 nm matches response silicon photomultiplier. Thus, as efficient zero extremely high (≈79 279 photons per MeV). Both NC colloidal film exhibit radioluminescence under irradiation. potential application reabsorption-free, cost, area, by prototype imaging spatial resolution.

Язык: Английский

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Low-dose real-time X-ray imaging with nontoxic double perovskite scintillators

Light Science & Applications, Год журнала: 2020, Номер 9(1)

Опубликована: Июнь 30, 2020

X-rays are widely used in probing inside information nondestructively, enabling broad applications the medical radiography and electronic industries. X-ray imaging based on emerging lead halide perovskite scintillators has received extensive attention recently. However, strong self-absorption, relatively low light yield toxicity of these perovskites restrict their practical applications. Here, we report a series nontoxic double-perovskite Cs

Язык: Английский

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Sb³⁺‐Doping in Cesium Zinc Halides Single Crystals Enabling High‐Efficiency Near‐Infrared Emission

Advanced Functional Materials, Год журнала: 2021, Номер 31(40)

Опубликована: Июль 10, 2021

Abstract Luminescent metal halide materials with flexible crystallography/electronic structures and tunable emission have demonstrated broad application prospects in the visible light region. However, designing near‐infrared (NIR) light‐emitting halides remains a challenge. Here, an enlightening prototype is proposed to explore high‐efficiency broadband NIR systems by incorporating Sb 3+ into Cs 2 ZnCl 4 matrix. Combined experimental analysis density functional theory calculations reveal modified self‐trapped excitons model elaborate emission. The high photoluminescence quantum yield of 69.9% peaking at 745 nm large full width half maximum 175 nm, along excellent air/thermal stability, show unique advantages lead‐free :Sb as source. substitution Cl − Br further enables red‐shift peak from 823 nm. diode device based on demonstrates potential non‐visible source night vision. This study puts forward effective strategy design novel eco‐friendly emissive provides guidance for expanding scope luminescent halides.

Язык: Английский

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Sb³⁺ Dopant and Halogen Substitution Triggered Highly Efficient and Tunable Emission in Lead-Free Metal Halide Single Crystals

Chemistry of Materials, Год журнала: 2020, Номер 32(12), С. 5327 - 5334

Опубликована: Май 15, 2020

Rational doping and compositional control remain significant challenges in designing luminescent metal halides to achieve highly efficient tunable emission. Here, the air-stable lead-free Cs2InCl5·H2O crystal with a zero-dimensional structure was investigated as pristine compound design new luminescence materials. Sb3+-doping Cs2InCl5·H2O:Sb3+ enabled broadband yellow emission photoluminescence quantum yield up 95.5%. The colors can be expanded into orange-red region by halogen substitution for Cs2InX5·H2O:Sb3+ (X = Cl/Br/I). optical characterizations along theoretical calculations demonstrate that characteristic singlet triplet self-trapped exciton emissions of ns2-metal-halide centers account luminescence. Moreover, admirable stability against air heat pave way its further applications white light-emitting diodes high-resolution fluorescent signs anticounterfeiting technology. Our achievement case Sb3+-doped represents successful strategy developing stable versatile applications.

Язык: Английский

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Colloidal Synthesis of Ternary Copper Halide Nanocrystals for High-Efficiency Deep-Blue Light-Emitting Diodes with a Half-Lifetime above 100 h

Nano Letters, Год журнала: 2020, Номер 20(5), С. 3568 - 3576

Опубликована: Апрель 3, 2020

Currently, the blue perovskite light-emitting diodes (PeLEDs) suffer from a compromise in lead toxicity and poor operation stability, most previous studies have struggled to meet crucial NTSC standard. In this study, electrically driven deep-blue LEDs (∼445 nm) based on zero-dimensional (0D) Cs3Cu2I5 nanocrystals (NCs) were demonstrated with color coordinates of (0.16, 0.07) high external quantum efficiency ∼1.12%, comparable best-performing lead-halide perovskites. Encouraged by remarkable stability NCs against heat environmental oxygen/moisture, proposed device was operated continuous current mode for 170 h, producing record half-lifetime ∼108 h. The further verified an aggressive thermal cycling test (300–360–300 K) 35-day storage test. Together eco-friendly features facile colloidal synthesis technique, 0D can be therefore regarded as promising candidate applications.

Язык: Английский

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Stable Yellow Light-Emitting Devices Based on Ternary Copper Halides with Broadband Emissive Self-Trapped Excitons

ACS Nano, Год журнала: 2020, Номер 14(4), С. 4475 - 4486

Опубликована: Март 13, 2020

Great successes have been achieved in developing perovskite light-emitting devices (LEDs) with blue, green, red, and near-infrared emissions. However, as key optoelectronic devices, yellow-colored LEDs remain challenging, mainly due to the inevitable halide separation mixed perovskites under high bias, causing undesired color change of devices. In addition this color-missing problem, intrinsic toxicity poor stability conventional lead-halide also restrict their practical applications. We herein report fabrication stable yellow based on a ternary copper CsCu2I3, addressing instability issues facing current LED's compromise. Joint experiment-theory characterizations indicate that electroluminescence originates from broadband emission self-trapped excitons centered at 550 nm well comparable reasonably low carrier effective masses favorable for charge transport. With maximum luminance 47.5 cd/m2 an external quantum efficiency 0.17%, fabricated exhibit long half-lifetime 5.2 h 25 °C still function properly 60 2.2 h, which benefits superior resistance CsCu2I3 heat, moisture, oxidation ambient environmental conditions. The results obtained promise halides light environment-friendly emitter compatible

Язык: Английский

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Lead‐Free Halide Perovskites for Light Emission: Recent Advances and Perspectives

Advanced Science, Год журнала: 2021, Номер 8(4)

Опубликована: Янв. 4, 2021

Abstract Lead‐based halide perovskites have received great attention in light‐emitting applications due to their excellent properties, including high photoluminescence quantum yield (PLQY), tunable emission wavelength, and facile solution preparation. In spite of characteristics, the presence toxic element lead directly obstructs further commercial development. Hence, exploiting lead‐free perovskite materials with superior properties is urgent necessary. this review, deep‐seated reasons that benefit light for perovskites, which help develop performance, are first emphasized. Recent advances (single crystals, thin films, nanocrystals different dimensionalities) from synthesis, crystal structures, optical optoelectronic then systematically summarized. particular, phosphor‐converted LEDs electroluminescent using fully examined. Ultimately, based on current development future directions terms devices discussed.

Язык: Английский

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