Luminescent zero-dimensional organic metal halide hybrids with near-unity quantum efficiency

Zhou, Chenkun; Lin, Haoran; Tian, Yu; Zhao, Yuan; Clark, Ronald J.; Chen, Banghao; Burgt, Lambertus J. van de; Wang, Jamie; Zhou, Yan; Hanson, Kenneth; Meisner, Quinton J.; Neu, Jennifer; Besara, Tiglet; Siegrist, T.; Lambers, E. S.; Djurovich, Peter I.; Ma, Biwu

doi:10.1039/c7sc04539e

Cited by 495 publications

(607 citation statements)

References 36 publications

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“…We attribute this to the formation of STEs. The radiative recombination of STEs is a well-known mechanism accounting for the large Stokes shifts observed in a number of broadly emitting lead halide perovskites, such as the recently reported two-dimensional (2D), one-dimensional (1D), and 0D systems 26–28 . An STE represents a photoinduced electron-hole pair (exciton) mediated by the interaction between the exciton and the corresponding lattice.…”

Section: Resultsmentioning

confidence: 99%

Pressure-induced emission of cesium lead halide perovskite nanocrystals

et al. 2018

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Metal halide perovskites (MHPs) are of great interest for optoelectronics because of their high quantum efficiency in solar cells and light-emitting devices. However, exploring an effective strategy to further improve their optical activities remains a considerable challenge. Here, we report that nanocrystals (NCs) of the initially nonfluorescent zero-dimensional (0D) cesium lead halide perovskite Cs4PbBr6 exhibit a distinct emission under a high pressure of 3.01 GPa. Subsequently, the emission intensity of Cs4PbBr6 NCs experiences a significant increase upon further compression. Joint experimental and theoretical analyses indicate that such pressure-induced emission (PIE) may be ascribed to the enhanced optical activity and the increased binding energy of self-trapped excitons upon compression. This phenomenon is a result of the large distortion of [PbBr6]4− octahedral motifs resulting from a structural phase transition. Our findings demonstrate that high pressure can be a robust tool to boost the photoluminescence efficiency and provide insights into the relationship between the structure and optical properties of 0D MHPs under extreme conditions.

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Section: Resultsmentioning

confidence: 99%

Pressure-induced emission of cesium lead halide perovskite nanocrystals

et al. 2018

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“…Lowering the dimensionality further to 1D at the molecular level, stronger quantum confinement and exciton-lattice interaction were observed with broadband emissions [13]. In an extreme case, when the metal halides are completely isolated by the organic moieties, 0D structure at the molecular level can be obtained to display the intrinsic properties of individual metal halide species [14]. In addition to structure control, doping Mn ions to this class of materials to achieve efficient red emission has been realized in different hybrids [15][16][17][18].…”

Section: Introductionmentioning

confidence: 91%

“…The complete isolation leads to no interaction between the photoactive metal halide species or electronic band formation. These single crystalline bulk assemblies of 0D materials can be considered as perfect host-guest systems, in which the photoactive metal halide species are periodically embedded in an inert host matrix (Figure 8(a-c)) [14]. Therefore, the potential energy diagram for these bulk assemblies of 0D materials can be described as in Figure 8(d), suggesting that the bulk materials can exhibit the intrinsic properties of the individual metal halide species.…”

Section: D Metal Halide Hybridsmentioning

confidence: 99%

“…Highly luminescent 0D Sb halide hybrids, such as [Bmim] 2 SbCl 5 [132] and (C 9 NH 20 ) 2 SbCl 5 [14], have been reported, which contain isolated pyramidal SbCl 5 species. Recently, a facile synthetic approach was established to prepare 0D (Ph 4 P) 2 SbCl 5 by taking advantage of the easy crystallization of tetraphenylphosphonium salts (Figure 8(g)) [133].…”

Section: D Metal Halide Hybridsmentioning

confidence: 99%

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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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“…84,85 Another class of materials with a broad and Stokes-shifted PL are 0D (and also 1D) organic–inorganic Sn 2+ bromides such as (C 4 N 2 H 14 X) 4 SnX 6 (X = Br or I). 85−87 In these 0D materials, the large organic cations completely isolate each SnX 6 4– octahedron. Thus, these materials are considered to exhibit the intrinsic properties of the individual SnX 6 4– clusters, and the photoluminescent properties are explained to be not as a result of lattice defects but rather due to excited-state structural reorganization within individual SnX 6 4– clusters.…”

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confidence: 99%

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

Akkerman

Abdelhady

Manna

2018

J. Phys. Chem. Lett.

220

247

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Over the past decade, lead halide perovskites (LHPs) have emerged as new promising materials in the fields of photovoltaics and light emission due to their facile syntheses and exciting optical properties. The enthusiasm generated by LHPs has inspired research in perovskite-related materials, including the so-called “zero-dimensional cesium lead halides”, which will be the focus of this Perspective. The structure of these materials is formed of disconnected lead halide octahedra that are stabilized by cesium ions. Their optical properties are dominated by optical transitions that are localized within the individual octahedra, hence the title “‘zero-dimensional perovskites”. Controversial results on their physical properties have recently been reported, and the true nature of their photoluminescence is still unclear. In this Perspective, we will take a close look at these materials, both as nanocrystals and as bulk crystals/thin films, discuss the contrasting opinions on their properties, propose potential applications, and provide an outlook on future experiments.

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Luminescent zero-dimensional organic metal halide hybrids with near-unity quantum efficiency

Abstract: Single crystalline zero-dimensional organic metal halide hybrids have been developed.

Cited by 495 publications

References 36 publications

Pressure-induced emission of cesium lead halide perovskite nanocrystals

Pressure-induced emission of cesium lead halide perovskite nanocrystals

Organic–inorganic metal halide hybrids beyond perovskites

Zero-Dimensional Cesium Lead Halides: History, Properties, and Challenges

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