Europium-Doped Lead-Free Cs3Bi2Br9 Perovskite Quantum Dots and Ultrasensitive Cu2+ Detection

Ding, Nan; Zhou, Donglei; Pan, Gencai; Xu, Wen; Chen, Xu; Li, Dongyu; Zhang, Xiaohui; Zhu, Jinyang; Ji, Yanan; Song, Hongwei

doi:10.1021/acssuschemeng.9b00038

Cited by 135 publications

(75 citation statements)

References 56 publications

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“…It was also shown that such Cs 3 BiBr 6 single crystals with band gap of 2.55 eV possess high thermal stability. To further improve PLQY of Cs 3 Bi 2 Br 9 perovskite NCs, a Eu 3+ -doping can be used via modified ligand-assisted reprecipitation (LARP) method as was shown in work [53]. The Cs 3 Bi 2 Br 9 :Eu 3+ NCs demonstrate multicolor emissions: Emission from the NC’ host Cs 3 Bi 2 Br 9 matrix and the Eu 3+ ion emissive transition.…”

Section: Synthesismentioning

confidence: 99%

Lead-Free Perovskites for Lighting and Lasing Applications: A Minireview

et al. 2019

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Research on materials with perovskite crystal symmetry for photonics applications represent a rapidly growing area of the photonics development due to their unique optical and electrical properties. Among them are high charge carrier mobility, high photoluminescence quantum yield, and high extinction coefficients, which can be tuned through all visible range by a controllable change in chemical composition. To date, most of such materials contain lead atoms, which is one of the obstacles for their large-scale implementation. This disadvantage can be overcome via the substitution of lead with less toxic chemical elements, such as Sn, Bi, Yb, etc., and their mixtures. Herein, we summarized the scientific works from 2016 related to the lead-free perovskite materials with stress on the lasing and lighting applications. The synthetic approaches, chemical composition, and morphology of materials, together with the optimal device configurations depending on the material parameters are summarized with a focus on future challenges.

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Section: Synthesismentioning

confidence: 99%

Lead-Free Perovskites for Lighting and Lasing Applications: A Minireview

et al. 2019

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“…Fortunately, previous efforts have discovered many efficient lead-free emitters, e.g., double-perovskite [30][31][32] , copper [33][34][35] and bismuth (Bi) [36][37][38] -based metal halides, which hold potential for X-ray scintillators. Very recently, Rb 2 CuBr 3 33 and Cs 2 NaTbCl 6 39 were shown to be scintillators with high light yield.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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X-rays are widely used in probing inside information nondestructively, enabling broad applications in the medical radiography and electronic industries. X-ray imaging based on emerging lead halide perovskite scintillators has received extensive attention recently. However, the strong self-absorption, relatively low light yield and lead toxicity of these perovskites restrict their practical applications. Here, we report a series of nontoxic double-perovskite scintillators of Cs 2 Ag 0.6 Na 0.4 In 1-y Bi y Cl 6. By controlling the content of the heavy atom Bi 3+ , the X-ray absorption coefficient, radiative emission efficiency, light yield and light decay were manipulated to maximise the scintillator performance. A light yield of up to 39,000 ± 7000 photons/MeV for Cs 2 Ag 0.6 Na 0.4 In 0.85 Bi 0.15 Cl 6 was obtained, which is much higher than that for the previously reported lead halide perovskite colloidal CsPbBr 3 (21,000 photons/MeV). The large Stokes shift between the radioluminescence (RL) and absorption spectra benefiting from self-trapped excitons (STEs) led to a negligible selfabsorption effect. Given the high light output and fast light decay of this scintillator, static X-ray imaging was attained under an extremely low dose of ∼1 μGy air , and dynamic X-ray imaging of finger bending without a ghosting effect was demonstrated under a low-dose rate of 47.2 μGy air s −1. After thermal treatment at 85°C for 50 h followed by X-ray irradiation for 50 h in ambient air, the scintillator performance in terms of the RL intensity and X-ray image quality remained almost unchanged. Our results shed light on exploring highly competitive scintillators beyond the scope of lead halide perovskites, not only for avoiding toxicity but also for better performance.

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“…In addition, developing a lead‐free and non‐toxic photocatalyst for dye degradation is still of great significance to reduce the risk of secondary pollution and has been proven as a photocatalyst for CO 2 reduction .…”

Section: Photoelectrochemical Applications Of Ihpqdsmentioning

confidence: 99%

“…Quantitative determination of biorecognition elements, heavy metal ion pollution, light intensity and other substances has become an important research topic. Owing to its high sensitivity, selectivity, low background, signal approach and rapid determination, the PEC sensing technique, which can usually use semiconductor QDs to convert the target object into photocurrent signal under light illumination, has attracted extensive attention with attractive application prospect …”

Section: Photoelectrochemical Applications Of Ihpqdsmentioning

confidence: 99%

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications

Liang

Chen

Yao

et al. 2019

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Inorganic halide perovskite quantum dots (IHPQDs) have recently emerged as a new class of optoelectronic nanomaterials that can outperform the existing hybrid organometallic halide perovskite (OHP), II–VI and III–V groups semiconductor nanocrystals, mainly due to their relatively high stability, excellent photophysical properties, and promising applications in wide‐ranging and diverse fields. In particular, IHPQDs have attracted much recent attention in the field of photoelectrochemistry, with the potential to harness their superb optical and charge transport properties as well as spectacular characteristics of quantum confinement effect for opening up new opportunities in next‐generation photoelectrochemical (PEC) systems. Over the past few years, numerous efforts have been made to design and prepare IHPQD‐based materials for a wide range of applications in photoelectrochemistry, ranging from photocatalytic degradation, photocatalytic CO2 reduction and PEC sensing, to photovoltaic devices. In this review, the recent advances in the development of IHPQD‐based materials are summarized from the standpoint of photoelectrochemistry. The prospects and further developments of IHPQDs in this exciting field are also discussed.

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Europium-Doped Lead-Free Cs₃Bi₂Br₉ Perovskite Quantum Dots and Ultrasensitive Cu²⁺ Detection

Cited by 135 publications

References 56 publications

Lead-Free Perovskites for Lighting and Lasing Applications: A Minireview

Lead-Free Perovskites for Lighting and Lasing Applications: A Minireview

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

Recent Progress and Development in Inorganic Halide Perovskite Quantum Dots for Photoelectrochemical Applications

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