Strongly Emissive Lead‐Free 0D Cs3Cu2I5 Perovskites Synthesized by a Room Temperature Solvent Evaporation Crystallization for Down‐Conversion Light‐Emitting Devices and Fluorescent Inks

Zhang, Fa; Zhao, Ziqi; Chen, Bingkun; Zheng, Hong; Huang, Lingling; Liu, Yue; Wang, Yongtian; Rogach, Andrey L.

doi:10.1002/adom.201901723

Cited by 115 publications

(116 citation statements)

References 61 publications

Supporting

Mentioning

106

Contrasting

Order By: Relevance

“…The efforts to address this issue have focused on the substitution of Pb with less-toxic or nontoxic elements. [229] Low-dimensional-networked lead-free perovskites have been widely investigated, such as Cs 3 Sb 2 I 9 (2D), [230] Cs 4 CuSb 2 Cl 12 (2D), [231] Cs 3 CuX 5 (0D) [232,233] Cs 3 Bi 2 X 9 (1D or 2D), [234] and CsCu 2 I 3 (1D). [235] In these lead-free structure, the abundant surface defects may worsen the bandgap trapping progress, resulting in poor optical properties and stability.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

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...

show abstract

Section: Discussionmentioning

confidence: 99%

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

et al. 2020

View full text Add to dashboard Cite

show abstract

“…63 G, Schematic diagram showing the basics of the room temperature solvent evaporation crystallization process to synthesize Cs 3 Cu 2 I 5 perovskite crystals, whose photographs under daylight and the UV lamp are provided on the right. Reproduced with permission: Copyright 2020, Wiley-VCH 70 displace nucleation. The separate processes of nucleation and growth led to a concurrent situation for all grains, which ensuring the mono-dispersity of the products.…”

Section: Hot-injection Methodsmentioning

confidence: 99%

“…G, Schematic diagram showing the basics of the room temperature solvent evaporation crystallization process to synthesize Cs 3 Cu 2 I 5 perovskite crystals, whose photographs under daylight and the UV lamp are provided on the right. Reproduced with permission: Copyright 2020, Wiley‐VCH 70 …”

Section: The Strategies For Lfmhps Preparationmentioning

confidence: 99%

“…The obtained products showed a PL emission centered at 600 nm with a FWHM of 136 nm and a high PLQY of 95%. In Figure 1G, Zhang et al 70 showed the process of synthesizing the Cs 3 Cu 2 I 5 and CsCu 2 I 3 using the solvent evaporation crystallization method. With this method, they fabricated the 0D millimeter‐sized crystals of Cs 3 Cu 2 I 5 perovskite, which show a strong blue PL emission at 442 nm with a high PLQY of 89%.…”

Section: The Strategies For Lfmhps Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Lead‐free metal halide perovskites for light‐emitting diodes

Yan

Feng

et al. 2021

EcoMat

View full text Add to dashboard Cite

Metal halide perovskites (MHPs) have been developing rapidly in recent years due to their outstanding optoelectronic properties and tremendous contributions from worldwide researchers. The external quantum efficiencies of perovskite light-emitting diodes (Pero-LEDs) have all exceeded 20% for the green, red, and near-infrared emitting ones. However, the toxicity and instability issues of the lead-based MHPs are still big problems limiting their practical applications. The applications of the lead-free MHPs (LFMHPs) are emerging as one of the most promising strategies to tackle these issues. Compared with lead-based MHPs, the LFMHPs show better environment stability and broader emission regions from the violet to near-infrared wavelength. Thanks to numerous contributions made by the researchers, great progress has already been made for the LFMHPs. For example, the photoluminescence quantum yield has reached near 100%. However, the performances of the lead-free Pero-LEDs are still lagging compared with their lead-based counterparts. In this review, we comprehensively summarize the synthesis developments of LFMHPs and their applications in the down-conversion white LEDs and electroluminescent Pero-LEDs. Moreover, some suggestions and outlooks of the lead-free Pero-LEDs developments are proposed in the end.

show abstract

“…To date, most of the synthesis techniques of 1D metal halide materials are based on solution process, such as antisolvent vapor‐assisted crystallization, [ 29,68 ] rapid antisolvent crystallization, [ 82,84 ] inverse‐temperature crystallization, [ 85 ] temperature‐lowering crystallization, [ 26,70,86 ] and solvent evaporation crystallization. [ 23,50,51,87 ] Therefore, it is necessary to develop other synthetic routes besides solution process. Synthesizing morphologically low‐dimensional structures, such as nanocrystals, nanorods, nanowires, nanosheets, and nanoplatelets, can be another effective route to tune the photophysical properties of these 1D metal halide materials.…”

Section: Summary and Future Perspectivesmentioning

confidence: 99%

One‐Dimensional Molecular Metal Halide Materials: Structures, Properties, and Applications

Rahaman

Lin

et al. 2021

Small Structures

View full text Add to dashboard Cite

Metal halides with low‐dimensional molecular structures are the rising stars in the horizon of functional materials research. Among them, 1D metal halide hybrids are very promising for future optoelectronic applications because of their unusual photophysical properties resulting from strong quantum confinement. In the past few years, besides lead‐based 1D metal halide hybrids, research has been extended to lead‐free organic and all‐inorganic metal halides. Due to near‐unity photoluminescence quantum yield and excellent structural stability, all‐inorganic 1D metal halides are suitable for environmentally friendly optoelectronic devices. Moreover, the distortion and connectivity mode of metal halide octahedra arouse the formation of self‐trapped excitons within 1D metal halides, thus endowing the materials with distinct optical properties. Recent investigations have revealed many exciting characteristics of this new class of materials, such as ferroelectricity, ferromagnetism, optical cooling, and so on. This perspective presents not only structure–property correlations and recent applications of 1D metal halides but also the existing challenges and future research directions.

show abstract

Strongly Emissive Lead‐Free 0D Cs₃Cu₂I₅ Perovskites Synthesized by a Room Temperature Solvent Evaporation Crystallization for Down‐Conversion Light‐Emitting Devices and Fluorescent Inks

Cited by 115 publications

References 61 publications

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

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

Lead‐free metal halide perovskites for light‐emitting diodes

One‐Dimensional Molecular Metal Halide Materials: Structures, Properties, and Applications

Contact Info

Product

Resources

About