Synthesis of ligand-free, large scale with high quality all-inorganic CsPbI3 and CsPb2Br5 nanocrystals and fabrication of all-inorganic perovskite solar cells

Murugadoss, Govindhasamy; Thangamuthu, R.; Kumar, Sakkarapalayam Murugesan Senthil; Anandhan, N.; Kumar, Manavalan Rajesh; Rathishkumar, Arumugam

doi:10.1016/j.jallcom.2019.02.018

Cited by 46 publications

(30 citation statements)

References 33 publications

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“…Different sized CsPbBr 3 nanoplates and Cs 4 PbBr 6 NCs were successfully obtained by adjusting the Cs precursor concentration. [128] Interestingly, the product could be readily scaled up by using this method, [82,129] which could reach up to 1.5 g per 40 mL solvents.…”

Section: Solvothermal/hydrothermal Approachmentioning

confidence: 99%

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

et al. 2020

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resistance against thermal-treatment compared to organic-inorganic hybrid lead halide perovskites (MAPbX 3 and FAPbX 3), due to the high thermal decomposition temperature of inorganic cations, thus drawing much attention. Owing to their impressive features, all-inorganic lead halide perovskites have been greatly useful in photovoltaic and optoelectronic applications, including solar cells, light-emitting diodes (LEDs), lasers, photodetectors and photocatalysis. [5-17] The conspicuous achievements in CsPbX 3 provoke the rapid development of its derivatives, Cs 4 PbX 6 and CsPb 2 X 5. These Cs x Pb y X z materials are composed of the same element compositions and [PbX 6 ] 4− unit cells. However, they possess completely different connectivity characters of [PbX 6 ] 4− octahedrons. CsPbX 3 is classified as a type of 3D perovskite, because [PbX 6 ] 4− octahedra are corner-shared along all three axes, while CsPb 2 X 5 has a sandwich-like arrangement with Cs + cations in between PbX 2 crystallographic planes, which can be regarded as a 2D phase. In Cs 4 PbX 6 , disconnected [PbBr 6 ] 4− octahedra are completely decoupled by Cs + cations. Among these three structures, CsPb 2 X 5 and Cs 4 PbX 6 , with dimensional-network less than 3 are referred to as lowdimensional-networked cesium lead halide perovskites. Besides the connectivity, these structures can be understood from a confinement perspective. CsPbX 3 is not confined in any dimension such that it can be considered as a 3D networked semiconductor. CsPb 2 X 5 and Cs 4 PbX 6 are confined in one dimension and all three dimensions, hence the name 2D and 0D structures, respectively. [18,19] In CsPb 2 X 5 and Cs 4 PbX 6 , the excitons cannot dissociate easily within all dimensions; instead, they are confined in the PbX 2 planes and individual [PbX 6 ] 4− units, respectively, resulting in larger bandgaps compared to the traditional ABX 3 phase. Figure 1 illustrates these three structures with different dimensions. Until now, comprehensive accounts of these Cs x Pb y X z materials have been made. However, most recent research focuses on CsPbX 3 , which has excellent optical properties and promising potential in various applications. Its derivatives, CsPb 2 X 5 and Cs 4 PbX 6 have achieved tremendous progress but are still far behind that of CsPbX 3. Many problems still seriously limit the rapid development of these low-dimensional-networked perovskites, a typical one being the debate on the origin of their luminescence. In this Review article, we focus on Cs 4 PbX 6 and CsPb 2 X 5 , and attempt to unveil their features, potential in All-inorganic cesium lead halide perovskites have emerged as promising optoelectronic materials with excellent photophysical properties and great potential in a variety of applications. In parallel with the most investigated CsPbX 3 , its derivates, Cs 4 PbX 6 and CsPb 2 X 5 , with low-dimensional-networked structures have also attracted great attention. In this review, recent advancements on the low-dimensional-networked cesium lead halide perovs...

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Section: Solvothermal/hydrothermal Approachmentioning

confidence: 99%

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

et al. 2020

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“…For example, the observation of CsPbBr 3 nanocrystals in CsPb 2 Br 5 , by either XRD or TEM, proves that CsPbBr 3 nanocrystals may be a possible source for the green emission, but it cannot exclude the possibility of defect contribution [28,33,39] . Conversely, the conclusion of luminescent CsPb 2 Br 5 based on TEM observation of pure CsPb 2 Br 5 is problematic because PL on the same TEM spot was typically not confirmed or reported [17,20,24,40,41] . It is well known that XRD is not a technique sensitive enough for detection of minority phases; while TEM is a local probe, it has to be combined with the same spot PL to connect structure to property [38,42] .…”

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confidence: 99%

“…The same argument and detection methods can be applied to CsPb 2 Br 5 nanowires or nanorods [40,41] .…”

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confidence: 99%

Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides

Wang

et al. 2019

Advanced Materials

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Same-spot Raman-photoluminescence with two lasers in a diamond anvil cell under hydrostatic pressure reveals that CsPbBr 3 nanocrystals, mostly located on the edges of CsPb 2 Br 5 2D platelets, are responsible for CsPb 2 Br 5 's green emission. This sensitive non-invasive technique combining static and dynamic probes establishes a one-toone property-structure relationship and distinguishes light emission from point defects versus nano-inclusions.

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“…were also very promising HTL candidates due to their excellent thermal stability, but their fabrication condition need be to be further optimized. [16,[137][138][139][140]…”

Section: Charge Transfer Layermentioning

confidence: 99%

Structural Properties and Stability of Inorganic CsPbI₃ Perovskites

et al. 2020

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All inorganic lead halide perovskites (ILHPs) have recently become one of the research hotspots in the field of photovoltaics. Due to the absence of weakly bonded organic components, ILHPs exhibit excellent thermal stability compared with the hybrid organic–inorganic perovskites. However, the low structural stability against ambient conditions still limits their practical applications. Herein, the phase stability and structural properties of the inorganic CsPbI3 are discussed, followed by a comprehensive review of strategies to improve the performance and stability of CsPbI3 perovskite solar cells (PSCs) with respect to material engineering and device configuration engineering. Finally, the challenges of inorganic PSCs and the promising directions to further improve their efficiency and stability are discussed.

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Synthesis of ligand-free, large scale with high quality all-inorganic CsPbI3 and CsPb2Br5 nanocrystals and fabrication of all-inorganic perovskite solar cells

Cited by 46 publications

References 33 publications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides

Structural Properties and Stability of Inorganic CsPbI₃ Perovskites

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Synthesis of ligand-free, large scale with high quality all-inorganic CsPbI3 and CsPb2Br5 nanocrystals and fabrication of all-inorganic perovskite solar cells

Cited by 46 publications

References 33 publications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Low‐Dimensional‐Networked Cesium Lead Halide Perovskites: Properties, Fabrication, and Applications

Extrinsic Green Photoluminescence from the Edges of 2D Cesium Lead Halides

Structural Properties and Stability of Inorganic CsPbI3 Perovskites

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Structural Properties and Stability of Inorganic CsPbI₃ Perovskites