Cesium Oleate Precursor Preparation for Lead Halide Perovskite Nanocrystal Synthesis: The Influence of Excess Oleic Acid on Achieving Solubility, Conversion, and Reproducibility

Lü, Chang; Wright, Marcus W.; Ma, Xiao; Li, Hui; Itanze, Dominique S.; Carter, Jake A.; Hewitt, Corey A.; Donati, George L.; Carroll, David; Lundin, Pamela M.; Geyer, Scott M.

doi:10.1021/acs.chemmater.8b04876

Cited by 76 publications

(76 citation statements)

References 34 publications

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“…Synthesis of CsPbBr3 nanoplatelets superlattices. Lead and cesium oleate solutions were prepared in line with previous descriptions by Lu et al 46 192 mg (1 mmol) of cesium acetate were placed into a 4 mL glass vial with stir bar, and 1 mL of OA was added. For lead oleate solutions, 379 mg (1 mmol) lead acetate were placed into a 4 mL glass vial with stir bar, and 1.5 mL of OA was added.…”

Section: Methodsmentioning

confidence: 99%

Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Toso¹,

Баранов²,

Altamura³

et al. 2020

Preprint

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Colloidal superlattices are fascinating materials made of ordered nanocrystals, yet they are rarely called “atomically precise.” That is unsurprising, given how challenging it is to quantify the degree of structural order in these materials. However, once that order crosses a certain threshold, constructive interference of X-rays diffracted by the nanocrystals dominates the diffraction pattern, offering a wealth of structural information. By treating nanocrystals as scattering sources forming a self-probing interferometer, we developed a multilayer diffraction method that enabled the accurate determination of nanocrystal size, interparticle spacing, and their fluctuations for samples of self-assembled CsPbBr<sub>3</sub> and PbS nanomaterials. The average nanocrystal displacement of 0.32-1.4 Å in the studied superlattices provides a figure of merit for their structural perfection and approaches the atomic displacement parameters found in traditional crystals. The method requires a laboratory-grade diffractometer and an open-source fitting algorithm for data analysis, providing a competitive alternative to resource-intensive synchrotron experiments.

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Section: Methodsmentioning

confidence: 99%

Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Toso¹,

Баранов²,

Altamura³

et al. 2020

Preprint

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“…In the synthesis of perovskite NCs, OA is widely used to passivate surfaces defects and to improve stability. [ 5a,27 ]…”

Section: The Luminescence Of Sb3+ In Metal Halidesmentioning

confidence: 99%

Photoluminescence of Singlet/Triplet Self‐Trapped Excitons in Sb³⁺‐Based Metal Halides

Jing

Liu

et al. 2021

Advanced Optical Materials

203

177

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these alternatives with varied crystal structures improved the water/thermal stability and optimized the optical performance of metal halide materials group. [7] ns 2 metal ion-based metal halides have always been regarded as the mainstream materials owing to their excellent optical properties and the facile synthesis procedure. [8] Moreover, ns 2 metal ion-based halides with broad-band emission and large Stokes shift, which can avoid selfabsorption effectively, are desirable for phonic applications. And, the self-trapped excitons (STEs) herein are ascribed to the strong electronphonon coupling in the distorted excited structure. [9] To generate diverse STEs emission in the visible light region, different ns 2 metal ions like Ge 2+ , Sn 2+ , Te 4+ , Bi 3+ , and Sb 3+ are selected to adjust emission peaks due to their different coordination environment and special crystal/local structures. [10] Among ns 2 metal halides, Sb 3+ -based halides with blue, green, and red tunable luminescence have been explored extensively as low-toxic and highly stable candidates, moreover, their luminescence mechanisms are discussed by combined experimental and theoretical methods, as well as their unique singlet and triplet excitonic emission. [5d,e,11] In this review, we first look back the electronic energy levels of ground state and excited state for ns 2 ions and the luminescence of Sb 3+ in transition metal oxides. Next, we summarize the recent progresses of the crystal structures, optical properties, and luminescence mechanisms of some Sb 3+ -based halides and Sb 3+ -doped metal halides including all-inorganic and hybrid organic-inorganic perovskite derivatives. Then, we discuss the current achievements of these materials in the emerging applications. And finally, we offer the perspective and some suggestions on the possible development of luminescent Sb 3+ -based metal halides. Electronic Energy Levels of Sb 3+The luminescence and radiation process of ns 2 ions in solidstate compounds have been widely investigated. [10a,b,d,12] A free Emerging lead-free metal halides with low toxicity and unparalleled optoelectronic properties have attracted growing research interests, also demonstrating extensive application potentials. Among these, Sb 3+ -based allinorganic/organic-inorganic hybrid metal halides become a vital group due to the special energy level distribution along with diverse optical properties. However, there remains a gap in understanding the relationship between the crystal structure and the radiation process of involved Sb 3+ emission. Herein, the existing reports about Sb 3+ -based luminescent metal halides are revisited and their structure-luminescence-application relationship is explored, and it is further established that the triplet self-trapped excitons (STEs) emission of Sb 3+ varies in different crystallographic environments and endows tunable luminescent performance. This work aims to provide constructive strategies in the further exploitation of Sb 3+ -based metal halides, and also guides the structura...

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“…The size of CsPbBr 3 NCs increased from about 10 to 15 nm and the size uniformity after the longer reaction time was also improved. This was considered to be due to Ostwald ripening (Figure g,h) . In particular, the small particles transformed into large particles to attain a lower energy state .…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembly of Completely Inorganic Perovskite Nanocrystals with Improved Stability by Anchoring on Kaolinite Lamellae

et al. 2020

Advanced Optical Materials

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Completely inorganic lead halide perovskite (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) are attracting increasing attention due to their outstanding luminescent properties, but their inherently poor stability is a severe impediment to further practical applications. Here, a facile two‐step synthetic procedure for preparing highly stable CsPbX3 NCs with the assistance of kaolinite lamellae (KL) is demonstrated. Systematic investigation shows that the cesium ions can be anchored tightly to the KL with the aid of strong Coulombic force interactions. These trigger the efficient growth of orthorhombic phase CsPbX3 NCs on the KL surfaces in a highly ordered manner. As a benefit of the inhibited aggregation caused by isolation and the anchoring effect of KL, the CsPbBr3‐KL composites display high luminescent efficiency (up to 73.0%) and excellent stability in air (>240 h). An efficient, stable, white light‐emitting diode device is fabricated by packaging green CsPbBr3‐KL and red CsPb(Br0.5I0.5)3‐KL composites on a blue GaN chip. These findings demonstrate the first attempt to improve the stability of CsPbX3 NCs by designing composites with materials having natural layers. This should shed important light on the preparation of high‐efficiency, stable, and color‐tunable perovskite materials for applications requiring high‐performance devices.

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Cesium Oleate Precursor Preparation for Lead Halide Perovskite Nanocrystal Synthesis: The Influence of Excess Oleic Acid on Achieving Solubility, Conversion, and Reproducibility

Cited by 76 publications

References 34 publications

Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Photoluminescence of Singlet/Triplet Self‐Trapped Excitons in Sb³⁺‐Based Metal Halides

Self‐Assembly of Completely Inorganic Perovskite Nanocrystals with Improved Stability by Anchoring on Kaolinite Lamellae

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Cesium Oleate Precursor Preparation for Lead Halide Perovskite Nanocrystal Synthesis: The Influence of Excess Oleic Acid on Achieving Solubility, Conversion, and Reproducibility

Cited by 76 publications

References 34 publications

Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Photoluminescence of Singlet/Triplet Self‐Trapped Excitons in Sb3+‐Based Metal Halides

Self‐Assembly of Completely Inorganic Perovskite Nanocrystals with Improved Stability by Anchoring on Kaolinite Lamellae

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Photoluminescence of Singlet/Triplet Self‐Trapped Excitons in Sb³⁺‐Based Metal Halides