Shape-Evolution Control of hybrid perovskite CH3NH3PbI3 crystals via solvothermal synthesis

Zhang, Baohua; Guo, Fuqiang; Yang, Liheng; Jia, Xiuling; Liu, Bin; Xie, Zili; Chen, Dunjun; Lu, Hai; Zhang, Rong; Zheng, Yuanlin

doi:10.1016/j.jcrysgro.2016.12.014

Cited by 18 publications

(18 citation statements)

References 21 publications

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“…Besides, the huge difference in photoluminescence intensity is significantly associated with the number of defects owing to the different reaction condition. These have been discussed in detail in our recent work [22].…”

Section: Photoluminescence Characteristicsmentioning

confidence: 81%

“…It suggests the existence of the characteristic 3d 3/2 (495.7 eV) and 3d 5/2 (487.2 eV) peaks of Sn 2+ in addition to Sn 4+ 3d 3/2 (496.1 eV) and 3d 5/2 (487.6 eV) [16,19]. The intensity of the PL emission peak depends on the number of defects in the crystals, and that of high purity and uniform crystals is relatively weaker [21,22], the highest one is 60 times larger than the lowest one as shown in Figure 6a. However, the relationship between the photoluminescence intensity and the crystal morphology is still irregular.…”

Section: Photoluminescence Characteristicsmentioning

confidence: 99%

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Morphologically Controlled Synthesis of Cs2SnCl6 Perovskite Crystals and Their Photoluminescence Activity

Zhang¹,

Zhu²,

Cheng³

et al. 2019

Crystals

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The Cs2SnX6 perovskites have attracted much attention due to excellent optoelectronic properties and high stability. In the present work, we have focused on the morphology control and photoluminescence characteristics of the Cs2SnCl6 perovskite crystals. The synthesis process of the Cs2SnCl6 crystals includes two stages composed of the formation of initial crystals and the growth of Cs2SnCl6; the later originated from the oxidization of CsSnCl3. This process has been confirmed by Scanning electron microscope (SEM) and X-rays diffraction (XRD). By controlling the concentration of the initial reactants and hydrochloric acid in the solution to change the supersaturation of the solution, different crystal morphologies, such as truncated octahedron, octahedron, hexapod, quasi-sphere, have been obtained. In relatively a low supersaturation solution, the amount of growth units dominates the crystal growth process to obtain the hexapod and self-assembly crystals. In contrast, in relatively high supersaturation solution, nucleation predominates to yield small size truncated octahedrons and near-spherical Cs2SnCl6 crystals. The synthesized Cs2SnCl6 crystals have shown a wide emission band peaking at 450 nm with full width at half maximum (FWHM) 63 nm due to the defects introduced by Sn2+. The photoluminescence intensities of crystals synthesized at various conditions exhibited considerable difference, which was about 60 times between the highest and the lowest.

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Section: Photoluminescence Characteristicsmentioning

confidence: 81%

Section: Photoluminescence Characteristicsmentioning

confidence: 99%

Morphologically Controlled Synthesis of Cs2SnCl6 Perovskite Crystals and Their Photoluminescence Activity

Zhang¹,

Zhu²,

Cheng³

et al. 2019

Crystals

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“…10 However, when the degree of supersaturation is nely adjusted at an intermediate degree of the interfacial instability, hopper shapes can form in the surface of the perovskite crystals when grown using a solution method. [11][12][13][14][15][16][17][18] Chen et al, 11 Zhang et al 15 and Li et al 17 obtained hopper shaped CH 3 NH 3 PbX 3 (X ¼ Br, I) perovskite crystals, and attributed it to the dissolution of the crystals due to the low concentration of the precursor in the central part. In the work of Hou et al, the local enrichment of methylamine caused the dissolution of the CH 3 NH 3 PbBr 3 crystal surface.…”

Section: Introductionmentioning

confidence: 99%

Growth of hopper-shaped CsPbCl₃ crystals and their exciton polariton emission

et al. 2021

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“…To overcome this challenge, the design of highly active, stable and low-cost bifunctional electrocatalysts is of upmost importance. In this context, research devoted to non-precious metal-based bifunctional electrocatalysts is, therefore, one of the most active and competitive fields in electrocatalysis [4][5][6][7]. Among them, cobalt oxides (Co3O4 and CoO) are widely used as oxygen electrocatalysts due to their straightforward preparation, high availability, high OER activity and stability in alkaline media [8,9].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Mesoporous Co₃O₄/CoO on rGO Nanocomposites as Highly Active and Stable Oxygen Bi-Functional Electrocatalysts

Abidat

Ferreira

Napporn

et al. 2020

J. Electrochem. Soc.

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Mesoporous Co3O4 mixed CoO onto reduced graphene oxide (rGO) nanocomposites were obtained by an easy surfactant-free synthesis using urea as hydrolyzing agent. This route enabled nanomaterials presenting tuned morphology, surface composition and oxide-rGO interactions as revealed by the different characterization techniques. Indeed, nanostructures varied from broom-like, chrysanthemumlike to micro-sized sheet-like morphologies. The amount of Co3O4 phase was shown to be gradually rising as the urea amount increases being always higher at the surface than in the bulk. Different oxide-rGO interactions have also been demonstrated, suggesting that high amounts of urea cause a decrease in the size of the nanoparticles and limit their superposition. The catalysts prepared at high urea concentrations showed more exposed electroactive surface and enhanced activity as bifunctional oxygen electrocatalysts. Furthermore, the most active nanocomposite exhibited remarkable stability, making it a very promising candidate for the elaboration of a stable and truly reversible air electrode in alkaline media.

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Shape-Evolution Control of hybrid perovskite CH3NH3PbI3 crystals via solvothermal synthesis

Cited by 18 publications

References 21 publications

Morphologically Controlled Synthesis of Cs2SnCl6 Perovskite Crystals and Their Photoluminescence Activity

Morphologically Controlled Synthesis of Cs2SnCl6 Perovskite Crystals and Their Photoluminescence Activity

Growth of hopper-shaped CsPbCl₃ crystals and their exciton polariton emission

Facile Synthesis of Mesoporous Co₃O₄/CoO on rGO Nanocomposites as Highly Active and Stable Oxygen Bi-Functional Electrocatalysts

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Shape-Evolution Control of hybrid perovskite CH3NH3PbI3 crystals via solvothermal synthesis

Cited by 18 publications

References 21 publications

Morphologically Controlled Synthesis of Cs2SnCl6 Perovskite Crystals and Their Photoluminescence Activity

Morphologically Controlled Synthesis of Cs2SnCl6 Perovskite Crystals and Their Photoluminescence Activity

Growth of hopper-shaped CsPbCl3 crystals and their exciton polariton emission

Facile Synthesis of Mesoporous Co3O4/CoO on rGO Nanocomposites as Highly Active and Stable Oxygen Bi-Functional Electrocatalysts

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Product

Resources

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Growth of hopper-shaped CsPbCl₃ crystals and their exciton polariton emission

Facile Synthesis of Mesoporous Co₃O₄/CoO on rGO Nanocomposites as Highly Active and Stable Oxygen Bi-Functional Electrocatalysts