Synthesis of Cesium Lead Halide Perovskite Quantum Dots

Shekhirev, Mikhail; Goza, John; Teeter, Jacob D.; Lipatov, Alexey; Sinitskii, Alexander

doi:10.1021/acs.jchemed.7b00144

Cited by 59 publications

(58 citation statements)

References 40 publications

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“…1c . This pattern is in very good agreement with other reports [13]. In addition, according to the Debye-Scherrer formula [14], the average crystallite size of ZnO NPs and CsPbBr 3 perovskite NPs was found to be ~ 52.46 nm and ~ 39.20 nm (Fig.…”

Section: Methodssupporting

confidence: 91%

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

et al. 2019

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All-inorganic cesium lead bromide (CsPbBr 3) perovskite nanoparticles and ZnO nanoparticles were synthesized. The structure, optical properties and the morphology of synthesized nanoparticles were fully characterized using X-ray diffraction (XRD), UV/Vis spectroscopy and transition electron microscopy (TEM). A comparative study was carried out to investigate the antibacterial activity of ZnO and CsPbBr 3 perovskite nanoparticles toward Gram-negative, rod-shaped Escherichia coli O157:H7 bacteria cells. Experimental results showed that the antibacterial activity of CsPbBr 3 nanoparticles was better than that of ZnO nanoparticles.

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Section: Methodssupporting

confidence: 91%

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

et al. 2019

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“…1a ). The perovskite NCs were synthesised via a hot injection method 26 – 28 (see “Methods” for details). Transmission electron microscopy (TEM) measurements revealed that the as-synthesized NCs have a cubic shape with an average size of 12 nm (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The Cs-oleate precursor was synthesised using the conventional hot injection method 26 – 28 . Cs 2 CO 3 (0.407 g), OA (1.25 ml) and ODE (15 ml) were dissolved in a 3-necked round-bottom flask by heating under vacuum at 120 °C for 60 min with magnetic stirring.…”

Section: Methodsmentioning

confidence: 99%

Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators

et al. 2020

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Compared with solid scintillators, liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light yields. Here, we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA3 (A: Cl, Br, I) nanocrystals (NCs) with organic molecules (2,5-diphenyloxazole). The hybrid liquid scintillators, compared to state-of-the-art CsI and Gd2O2S, demonstrate markedly highly competitive radioluminescence quantum yields under X-ray irradiation typically employed in diagnosis and treatment. Experimental and theoretical analyses suggest that the enhanced quantum yield is associated with X-ray photon-induced charge transfer from the organic molecules to the NCs. High-resolution X-ray imaging is demonstrated using a hybrid CsPbBr3 NC-based liquid scintillator. The novel X-ray scintillation mechanism in our hybrid scintillators could be extended to enhance the quantum yield of various types of scintillators, enabling low-dose radiation detection in various fields, including fundamental science and imaging.

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“…[37,[45][46][47] Figure 1c shows the X-ray diffraction (XRD) pattern for samples with 60% and 67% iodide contents, where the two main peaks at 30 and 15 2θ are characteristic of the orthorhombic perovskite structure. [48][49][50] We reported additional compositions in the Supporting Information. The same Figure 1c displays the XRD pattern (red lines) for the same films left in the dark for about 100 h at room temperature and relative humidity lower than 38%.…”

Section: Stable Inorganic Perovskite Mixed Halide Compositionmentioning

confidence: 99%

Efficient and Stable Inorganic Perovskite Solar Cells Manufactured by Pulsed Flash Infrared Annealing

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et al. 2018

Advanced Energy Materials

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approach to enhance the stability of the material under device working condition, i.e., light and thermal stress. [6,7] ABX 3 halide perovskites most commonly used in solar cells contain cesium, methylammonium (MA) and formamidinium (FA) in the A site, Pb in the B, and Br and I in the X site of the crystalline lattice. [1,8-10] Compositions based on organic cations, such as MA and FA, can be prepared with a bandgap of around 1.5 eV, which is suited for an efficient single junction solar cell. [11] However, the presence of organic cations, and in particular the volatile MA, is linked to the relatively poor thermal stability and the high sensitivity to humid air, which affect most of the perovskite compositions employed in highly efficient PSCs. [12-16] Swapping entirely or in part the organic with inorganic cations, such as cesium (Cs), can help to enhance the stability of halide perovskites at the cost of a bandgap higher than 1.5, [17,18] which is suboptimal for a single junction solar cells. For example, the fully inorganic CsPbI 3 perovskite has a bandgap of 1.7 eV, which is not optimal for single junction but is instead nearly ideally suited for perovskite-silicon tandem solar cell. [19-21] Unfortunately, CsPbI 3 is only stable in the photovoltaic active perovskite structure-black phase-at temperatures above 300 °C, [22-25] which is not useful for applications. Partially (or completely) replacing iodide (I) with bromide (Br), i.e., exploring CsPbI x Br (3−x) compositions, can stabilize the active photovoltaic phase at room temperature with progressively increasing bandgap as the bromine content increases. This mixed halide approach is extensively used to prepared stable inorganic halide perovskite both for photo voltaic and light emitting devices. [26-32] As restricted to photovoltaics, it is a challenge controlling the interplay between phase stability, which can be obtained by enhancing the Br content, while maintaining the smallest possible bandgap. Indeed, the larger ionic radius of I as compared to Br upsets the stability perovskite, which tends to relax in a photovoltaic inactive delta phase. [33-37] The I/Br ratio must be therefore adjusted to achieve the lowest possible bandgap without sacrificing the perovskite phase stability. In the search for the best I/Br ratio, CsPbI 2 Br (I 67%, Br 33%) has been so far indicated as the optimum to achieve the highest efficiency PSC with a stable inorganic perovskite. [34-38] Liu et al. reported

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Synthesis of Cesium Lead Halide Perovskite Quantum Dots

Cited by 59 publications

References 40 publications

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

The comparison of antibacterial activities of CsPbBr3 and ZnO nanoparticles

Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators

Efficient and Stable Inorganic Perovskite Solar Cells Manufactured by Pulsed Flash Infrared Annealing

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