Synthesis, properties, and optical applications of low-dimensional perovskites

Zhang, Yupeng; Liu, Jingying; Wang, Ziyu; Xue, Yunzhou; Ou, Qingdong; Polavarapu, Lakshminarayana; Zheng, Jun; Qi, Xiang; Bao, Qiaoliang

doi:10.1039/c6cc06425f

Cited by 261 publications

(211 citation statements)

References 132 publications

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“…It was demonstrated that by changing the capping organic ligand, the morphology of CsPbX 3 could be effectively tuned from nanocubes to nanowires and nanoplatelets with different sizes (Figure 4) [73][74][75]. The synthesis, properties, and applications of morphological low dimensional metal halide perovskites have been well reviewed in several publications [45,46,65,[76][77][78].…”

Section: Morphological Low Dimensional Metal Halide Perovskitesmentioning

confidence: 99%

Organic–inorganic metal halide hybrids beyond perovskites

Zhou

Lin

Lee

et al. 2018

Materials Research Letters

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Organic-inorganic metal halide hybrids have emerged as new generation functional materials with exceptional structure and property tunability for a variety of applications. Besides the most investigated ABX 3 metal halide perovskites, a variety of hybrids consisting of a wide range of organic cations and metal halide anions have been developed and studied recently. Here, we provide an overview of these new materials possessing various crystallographic structures, including double perovskites, low dimensional hybrids, and other perovskite-related materials. We discuss their syntheses, functional properties, and optoelectronic applications. Challenges and opportunities are then laid out for these hybrid materials beyond perovskites. IMPACT STATEMENTBy choosing appropriate organic cations and metal halide anions, single crystalline ionically bonded hybrid materials can be assembled to possess various structures beyond the well-known ABX 3 perovskite. These hybrid materials exhibit exciting new properties with potential applications in a variety of areas. ARTICLE HISTORY

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Section: Morphological Low Dimensional Metal Halide Perovskitesmentioning

confidence: 99%

Organic–inorganic metal halide hybrids beyond perovskites

Zhou

Lin

Lee

et al. 2018

Materials Research Letters

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“…[49] Since then a large number of research and review articles have been published on perovskite-based LEDs. [13,19,50] The efficiency of these LEDs has been significantly improved by replacing bulk 3D perovskites with corresponding nanocrystals that exhibit weak quantum confinement effects (emission wavelength close to 3D perovskites, but significantly enhanced PLQYs approaching 100%). [37,51,52] The fabrication of bright LEDs covering the entire visible spectrum using both organic/ inorganic hybrid and all-inorganic perovskite nanocrystals has been reported.…”

Section: Applicationsmentioning

confidence: 99%

“…[13,14] These components not only dictate the crystal structure, but also control their optical and electronic properties. [2,15] Exemplary is the optical bandgap, which can be tuned throughout the visible range by controlling the halide content.…”

mentioning

confidence: 99%

Advances in Quantum‐Confined Perovskite Nanocrystals for Optoelectronics

Polavarapu

Nickel

Feldmann

et al. 2017

Advanced Energy Materials

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bivalent cation (Pb 2+ , Sn 2+ or Ge 2+ ) enveloped by an octahedron comprising six halide ions (XCl − , Br − or I − ) with A being a monovalent cation (e.g., CH 3 NH 3 + , NH 2 CHNH 2 + , or Cs + ) residing in between these corner sharing octahedra. [13,14] These components not only dictate the crystal structure, but also control their optical and electronic properties. [2,15] Exemplary is the optical bandgap, which can be tuned throughout the visible range by controlling the halide content. Halide perovskites can form two-dimensional (2D) or quasi-2D layered structures with thickness of one or a few octahedral layers. [16] The reduced thickness of these layers leads to quantum confinement effects, which changes their optical properties significantly in comparison with their three-dimensional (3D) counterparts, as studied since the 80's on thin film perovskites. [17] Recent studies have shown that nanocrystalline perovskites exhibit enhanced PLQYs and offer tunable optical properties not only through their constituent ions but also through their size. [3,[8][9][10][11]15,18,19] Quantum size effects, as illustrated in Figure 1a, have been extensively investigated in conventional semiconductor nanocrystals such as metal chalcogenides and utilized for a wide range of applications during the last two decades. [20] As the size of the nanocrystals approaches the exciton Bohr radius of the material, quantum confinement effects start to influence the excitonic wave function and the energetic states of the exciton, leading to blueshifted photoluminescence (Figure 1a). Precise control of colloidal semiconductor nanocrystal size has enabled the tuning of the PL emission over wide wavelength ranges. Similarly, perovskite nanocrystals of reduced dimensionality exhibit quantum confinement effects, as shown for the case of nanoplatelets in 2015. [8][9][10]21,22] Despite recent advances, an accurate understanding of thickness-and dimensionality-dependent optical properties of perovskite nanocrystals still proves elusive due to difficulties in the controlled syntheses and characterization of their dimensions. Additionally, while many recent publications present perovskite nanocrystals, most of these show negligible or no quantum confinement. [23,24] Here we will provide a concise overview of quantum confinement effects in perovskite nanocrystals, highlighting synthetic methods and resulting properties, characterization methods and finally applications for these enticing nanostructures.Metal halide perovskites have emerged as a promising new class of layered semiconductor material for light-emitting and photovoltaic applications owing to their outstanding optical and optoelectronic properties. In nanocrystalline form, these layered perovskites exhibit extremely high photoluminescence quantum yields (PLQYs) and show quantum confinement effects analogous to conventional semiconductors when their dimensions are reduced to sizes comparable to their respective exciton Bohr radii. The reduction in size leads to strongly blueshifted ...

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“…This chemical bonding nature could endow them special properties distinguished from their 3D structures. For example, these 2D perovskites have an increased exciton binding energy, can reduce fluorescence decay time, and enhance absorption cross sections with respect to the bulk as well as having a notable optical nonlinearity [40][41][42]. Moreover, energy transfer in the stack of 2D perovskite sheets or platelets is significantly enhanced due to the large contact area between individual platelets.…”

Section: Two-dimensional Materials For Photodetector 76mentioning

confidence: 99%

Two-Dimensional Halide Perovskites for Emerging New- Generation Photodetectors

Tang¹,

Cao²,

Chi³

2018

Two-Dimensional Materials for Photodetector

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Compared to their conventional three-dimensional (3D) counterparts, two-dimensional (2D) halide perovskites have attracted more interests recently in a variety of areas related to optoelectronics because of their unique structural characteristics and enhanced performances. In general, there are two distinct types of 2D halide perovskites. One represents those perovskites with an intrinsic layered crystal structure (i.e. MX 6 layers, M = metal and X = Cl, Br, I), the other defines the perovskites with a 2D nanostructured morphology such as nanoplatelets and nanosheets. Recent studies have shown that 2D halide perovskites hold promising potential for the development of new-generation photodetectors, mainly arising from their highly efficient photoluminescence and absorbance, color tunability in the visible-light range and relatively high stability. In this chapter, we present the summary and highlights of latest researches on these two types of 2D halide perovskites for developing photodetectors, with an emphasis on synthesis methods, structural characterization, optoelectronic properties, and theoretical analysis and simulations. We also discuss the current challenging issues and future perspective. We hope this chapter would add new elements for understanding halide perovskite-based 2D materials and for developing their more efficient optoelectronic devices.

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Synthesis, properties, and optical applications of low-dimensional perovskites

Cited by 261 publications

References 132 publications

Organic–inorganic metal halide hybrids beyond perovskites

Organic–inorganic metal halide hybrids beyond perovskites

Advances in Quantum‐Confined Perovskite Nanocrystals for Optoelectronics

Two-Dimensional Halide Perovskites for Emerging New- Generation Photodetectors

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