Aqueous Solution Growth of Millimeter-Sized Nongreen-Luminescent Wide Bandgap Cs<sub>4</sub>PbBr<sub>6</sub> Bulk Crystal

Zhang, Zhaojun; Zhu, Yanming; Wang, Weiliang; Zheng, Wei; Lin, Rijia; Li, Xubiao; Zhang, Hao; Zhong, Dingyong; Huang, Feng

doi:10.1021/acs.cgd.8b00817

Cited by 59 publications

(103 citation statements)

References 29 publications

(87 reference statements)

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“…The thickness of each CMD is measured to be ≈200 nm (Figure S9a, Supporting Information). The corresponding X‐ray diffraction (XRD) pattern (Figure b, green line) of these CMDs matches well with the standard card and the reported XRD pattern of rhombohedral Cs 4 PbBr 6 phase . Qualitative elemental analysis from EDX on individual CMDs shows that the molar ratio of Cs:Pb:Br element is in accord with the stoichiometric ratio of Cs 4 PbBr 6 and three elements all have uniform distribution (Figure S8a, Supporting Information).…”

Section: Resultssupporting

confidence: 79%

“…Significantly, we find that many small particles are inserted inside the Cs 4 PbBr 6 crystal. According to a recently reported result, these smaller lattice distances of 0.29 and 0.27 nm should be attributable to CsPbBr 3 phase . In addition, the Moiré fringe patterns in Figure d also point to the existence of CsPbBr 3 phase, which is formed through coupling two overlapping lattice fringes.…”

Section: Resultssupporting

confidence: 62%

“…These results demonstrate the single‐crystalline nature of obtained CMDs but the concomitant existence of CsPbBr 3 phase inside the Cs 4 PbBr 6 microcrystals, namely, CsPbBr 3 ‐in‐Cs 4 PbBr 6 CMDs. For rhombohedral Cs 4 PbBr 6 morphology, many previous works have demonstrated that green emissive rhombohedral Cs 4 PbBr 6 single crystal consists of embedded CsPbBr 3 NCs and Cs 4 PbBr 6 matrixes . Herein, we further demonstrate the structure of the circular‐like Cs 4 PbBr 6 MDs is embedded CsPbBr 3 NCs in Cs 4 PbBr 6 microcrystals by XRD refinement and TEM analysis.…”

Section: Resultsmentioning

confidence: 59%

“…Using DMF/DCM as solvent/antisolvent, desired CMDs can be synthesized successfully. Owing to the intrinsic characteristics of trigonal crystal system, Cs 4 PbBr 6 microcrystal is usually rhombus in shape and consists of isolated octahedral PbBr 6 4− ions interspersed with Cs + cations . The key to control the shape of Cs 4 PbBr 6 microcrystal is tuning the growing rate of each crystal plane.…”

Section: Resultsmentioning

confidence: 99%

“…Cs 4 PbX 6 (X is halogen) is defined as 0D perovskite because the individual PbX 6 4− octahedrons are separated from each other by interspersed Cs + ions in three crystal lattice dimensions . Most of the reported Cs 4 PbBr 6 single crystal morphology are rhombus due to its inherent trigonal space group R̅ c . Theoretically, the Cs 4 PbBr 6 can grow into trigonal, rhombohedral, or hexagonal platelets (prisms) under suitable crystallization kinetics process.…”

Section: Introductionmentioning

confidence: 99%

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Solution‐Processed Perovskite Microdisk for Coherent Light Emission

Li¹,

Zhang

Li³

et al. 2019

Advanced Optical Materials

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High‐quality semiconductor microdisks (MDs) are of crucial importance for realizing on‐chip coherent light sources. However, the fabrication of all‐inorganic semiconductor circular or circular‐like microdisks (CMDs) with suitable size for optoelectronic applications is still complex and expensive. Herein, a facile ligand‐free antisolvent‐assisted growth method is used to synthesize high‐quality Cs4PbBr6 MDs with tunable size and morphology, which is evolved from rhombohedral to octahedral, hexagonal‐like, and circular‐like MDs based on Cl‐containing antisolvents. Significantly, this is the first time that large semiconductor CMDs are synthesized from solution self‐assembled growth at room temperature. These Cs4PbBr6 MDs show high‐efficient and stable green emission (522 nm), which should be attributed to the first‐order excitonic emission from embedded CsPbBr3 nanocrystals (NCs). The distribution of CsPbBr3 NCs is verified by lattice fringe, crystal data refinement, and time‐resolved photoluminescence analysis. These CsPbBr3‐in‐Cs4PbBr6 CMDs are demonstrated to hold outstanding two‐photon pumped coherent light emission ability with a remarkably low threshold (400 µJ cm−2). These findings suggest CsPbBr3‐in‐Cs4PbBr6 MDs have excellent light emission capability and stability toward practical optoelectronic applications, and their tunable morphology and size indicate that solution method is feasible for the fabrication of semiconductor CMDs.

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Section: Resultssupporting

confidence: 79%

Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Solution‐Processed Perovskite Microdisk for Coherent Light Emission

Li¹,

Zhang

Li³

et al. 2019

Advanced Optical Materials

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A Scalable H₂O–DMF–DMSO Solvent Synthesis of Highly Luminescent Inorganic Perovskite‐Related Cesium Lead Bromides

Zhou

Ding

Wang

et al. 2020

Advanced Optical Materials

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All‐inorganic cesium lead bromide perovskites have attracted a lot of attention because of their excellent optical properties that can potentially be applied in various optical devices. However, large‐scale preparation of cesium lead bromide perovskites with outstanding optical performance is still hindered by the poor solubility of CsBr in polar aprotic solvents. In this work, a water/dimethylsulfoxide (DMSO)/dimethylformamide (DMF) system is demonstrated for the synthesis of inorganic cesium lead bromide perovskites, where the introduction of water can effectively address the dissolution issue of Cs+ ions. Large‐scale synthesis of pure‐phase emissive Cs4PbBr6 with a product yield of up to 73% is achieved and the photoluminescence quantum yield of resulting product reaches as high as 76%. The origin of the light emission is further revealed by the photoluminescence evolution of the colored Cs4PbBr6 single crystals. Furthermore, reversible phase transitions between Cs4PbBr6, CsPbBr3 and CsPb2Br5 are achieved by changing solely the water content, which paves the way for the recycle of the mother solution of Cs4PbBr6 without generation of additional hazardous waste. The three‐solvent‐based synthetic approaches enable an economical, robust, and large‐scale production for all‐inorganic cesium lead bromide perovskites.

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Enhanced Photocatalytic Activity of Cs₄PbBr₆/WS₂ Hybrid Nanocomposite

Immanuel,

Huang,

Taank

et al. 2023

Adv Energy and Sustain Res

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Photocatalytic processes are among the prime means for mitigating the pollution caused by toxic effluents. In this context, photocatalysis presents a promising path and is undergoing rapid evolution. Halide perovskite‐nanocrystals (HP‐NCs) are excellent candidates due to their negative conduction band minimum and low work function, essential for photocatalysis. Yet, HP‐NCs face limitations within this domain because they are prone to chemical degradation when exposed to external factors like high temperature, polar solvents, oxygen, and light. A practical approach toward stabilizing HP‐NCs involves hybridizing them with a chemically inert material that can provide steric stabilization and act as a cocatalyst. Transition‐metal dichalcogenides emerge as outstanding candidates to sterically stabilize the HPs as they are stable, chemically inert, and can serve as co‐catalysts, enabling suppressed charge recombination. Herein, the photocatalytic performance of Cs4PbBr6/WS2‐nanocomposites towards organic dye degradation in polar solvents under visible light illumination is investigated. We found that the presence of WS2 nanostructures significantly stabilizes the HP‐NCs and promotes dye degradation rate compared to pristine Cs4PbBr6‐NCs. Using transient absorption measurements, we found that the WS2‐nanostructures act as an electron transport channel, effectively reducing charge recombination in the NCs. These findings pave the way for implementing Cs4PbBr6/WS2‐nanocomposites as stable and superior photocatalysts.

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Aqueous Solution Growth of Millimeter-Sized Nongreen-Luminescent Wide Bandgap Cs₄PbBr₆ Bulk Crystal

Cited by 59 publications

References 29 publications

Solution‐Processed Perovskite Microdisk for Coherent Light Emission

Solution‐Processed Perovskite Microdisk for Coherent Light Emission

A Scalable H₂O–DMF–DMSO Solvent Synthesis of Highly Luminescent Inorganic Perovskite‐Related Cesium Lead Bromides

Enhanced Photocatalytic Activity of Cs₄PbBr₆/WS₂ Hybrid Nanocomposite

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Aqueous Solution Growth of Millimeter-Sized Nongreen-Luminescent Wide Bandgap Cs4PbBr6 Bulk Crystal

Cited by 59 publications

References 29 publications

Solution‐Processed Perovskite Microdisk for Coherent Light Emission

Solution‐Processed Perovskite Microdisk for Coherent Light Emission

A Scalable H2O–DMF–DMSO Solvent Synthesis of Highly Luminescent Inorganic Perovskite‐Related Cesium Lead Bromides

Enhanced Photocatalytic Activity of Cs4PbBr6/WS2 Hybrid Nanocomposite

Contact Info

Product

Resources

About

Aqueous Solution Growth of Millimeter-Sized Nongreen-Luminescent Wide Bandgap Cs₄PbBr₆ Bulk Crystal

A Scalable H₂O–DMF–DMSO Solvent Synthesis of Highly Luminescent Inorganic Perovskite‐Related Cesium Lead Bromides

Enhanced Photocatalytic Activity of Cs₄PbBr₆/WS₂ Hybrid Nanocomposite