Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations

Nazarenko, Olga; Kotyrba, Martin; Wörle, Michael; Cuervo‐Reyes, Eduardo; Yakunin, Sergii; Kovalenko, Maksym V.

doi:10.1021/acs.inorgchem.7b01204

Cited by 133 publications

(181 citation statements)

References 80 publications

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“…It is notable that the ammonium groups (‐NH 2 ) of G cations form strong NH···I hydrogen bonds with the neighboring iodine ions of corner‐sharing PbI 6 octahedra (Figure b; Table S4, Supporting Information). Emphatically, compared with the previous studies on Cs + /G + , MA + /G + or FA + /G + systems in which G + acts as the “spacer”, the G + cation in (PA) 2 (G)Pb 2 I 7 is for the first time confined in the cavity instead of interlayer space. Figure c depicts that G cation resides in the barycenter of the polyhedral voids between the corner‐sharing PbI 6 octahedra.…”

Section: Resultsmentioning

confidence: 94%

Highly Sensitive and Ultrafast Responding Array Photodetector Based on a Newly Tailored 2D Lead Iodide Perovskite Crystal

Liu

et al. 2019

Advanced Optical Materials

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flexibility and allow for a molecule-level assembling of inorganic and organic components. [10][11][12][13][14] Structurally, inorganic perovskite layers (wells) and the organic spacers (barriers) are organized alternatively, resembling that of the quantumconfined motifs, which render a vast modulation of electronic and optical properties. [15][16][17][18] For instance, the conductive attributes for a series of tin(II)-based 2D hybrid perovskites have been finely tuned from semiconducting to metallic states by increasing the number of inorganic perovskite layers. [19,20] Particularly, their inherent 2D quantum-confined structures facilitate rapid dissociation of the photogenerated electron-hole pairs: the electrons transfer to inorganic conduction band and high electron mobility reduces recombination rate, thus creating the large photoconductivity gains. [21] Therefore, such unique characteristics make 2D hybrid perovskites promising candidates for assembling newly conceptual optoelectronic devices, particularly for the high-performance photodetectors.As an intriguing subclass, 2D Ruddlesden-Popper multilayered perovskites with a generic formula of (A 1 ) 2 (A 2 ) n−1 PbI 3n+1 (A 1 is bulky "spacer" sandwiched by perovskite layers and A 2 is small "perovskiter" cation in the cavity enclosed by PbI 6 octahedra), [22][23][24][25] have recently stimulated intensive research in the field of photodetection. [26][27][28] For example, photodetectors fabricated on single crystals of (C 4 H 9 NH 3 ) 2 (MA) 2 Pb 3 I 10 exhibit a detectivity up to ≈3.6 × 10 10 Jones. [27] Despite great efforts devoted to 2D hybrid perovskites, for practical application, the photosensitivity and responding rate of such photodetectors still need improved. [29][30][31] In this context, to design new 2D candidates are indispensable for the advance of highperformance photodetectors. In the known lead iodide ABX 3 system, the "perovskiter" is strictly limited by a very narrow selection of small-size organic cations, such as CH 3 NH 3 + (r = 217 pm) and NH 2 CHNH 2 + (r = 253 pm). [32] Owing to the strict restriction of tolerance-factor concept, it is almost impossible to accommodate organic cations with even large ionic radii into the perovskite cavity. [33] However, we propose that 2D organic-inorganic hybrid perovskites are emerging as the promising alternatives in photodetection, due to their unique merits stemming from intrinsic quantum-confined structures. Despite great ongoing effects, highly sensitive and ultrafast responding photodetectors of 2D hybrid perovskites remain a huge blank. Here, the first nanosecond-responsive array photodetector based on 2D perovskite crystals of (PA) 2 (G)Pb 2 I 7 (where PA = n-pentylaminium and G = guanidinium) is fabricated, which features a newly tailored bilayer motif with large-size G cation as "perovskiter" inside the distorted PbI 3 perovskite framework. This motif creates a new branch of the intriguing 2D hybrid perovskite family. Strikingly, both high photodetectivities (6.3 × 10 12 Jones) and respo...

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Section: Resultsmentioning

confidence: 94%

Highly Sensitive and Ultrafast Responding Array Photodetector Based on a Newly Tailored 2D Lead Iodide Perovskite Crystal

Liu

et al. 2019

Advanced Optical Materials

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“…Despite of their success, there remain critical gaps in chemistry and scope to removal of lead and ligand toxicity. For example, nontoxic ligand–stabilized perovskite nanocrystals are rarely demonstrated in the literature . The installation of nontoxic ligands onto the surface of the perovskite nanocrystals substrate represents a unique synthetic challenge, that if overcome could significantly expand the utility of nontoxic‐based perovskite interfaces.…”

Section: Introductionmentioning

confidence: 99%

“…The installation of nontoxic ligands onto the surface of the perovskite nanocrystals substrate represents a unique synthetic challenge, that if overcome could significantly expand the utility of nontoxic‐based perovskite interfaces. Protocols for the synthesis of perovskite nanoparticles with precise sizes and shapes have been finely tuned over years . These methods often involve the use of oleylamine and oleic acid as ligands .…”

Section: Introductionmentioning

confidence: 99%

Essential Amino Acid–Enabled Lead Bromide Perovskite Nanocrystals with High Stability

Sharma

Bansal

Nim

et al. 2019

Part & Part Syst Charact

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This work reports the first synthesis of MAPbBr3 perovskite nanocrystals (PNCs) using amino acids as the ligand with excellent optical properties. A variety of amino acids are used to optimize the luminescence properties. A mechanochemical approach has taken lead over conventional colloidal chemistry during synthesis. All morphological and optical studies are performed to characterize the synthesized perovskite nanoparticles. Later, stability studies are investigated through thermogravimetric analysis, temperature‐dependent photoluminescence, time‐dependent X‐ray diffraction, as well as X‐ray photoelectron spectroscopy. In an application, interestingly, these perovskites show high luminescence upon scratching on flexible conducting plates and on plain paper surface. These results suggest that the amino acid–ligated perovskite nanocrystals can be potential materials for optoelectronic application including light‐emitting diodes and imaging.

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“…[34] In 2003, Mitzi reported the first structure of al ayered hybrid perovskite with two cations in the interlayer space,t he 2,3,4,5,6-pentafluorophenethylammonium (5FPEA + )and the À2-naphtylenethylammonium (NEA + )c ations:( 5FPEA,-NEA)SnI 4 .Ifastatistical disorder affects the organic cations, however, the analysis of physically reasonable intermolecular distances indicates that the organic bilayer is organized with each of the layers consisting of the same type of organic cation. [35] More recently,K ovalenko et al reported the structures of (Cs)(Gua)[PbX 4 ]( X = Br,I )a nd (Cs)(Gua)-[CsPb 2 Br 7 ]( Gua = guanidinium), [36] while at the same time Kanatzidis et al claimed that they discovered an ew type of 2D perovskites,w hich consists of two different alternating cations in the interlayer space (named ACI), (Gua,MA)-[(MA) nÀ1 Pb n I 3n+1 ]( n = 1, 2, 3). [37] These authors also define the ACIs tructures as lying "in between (the DJ and RP structures) and combines the layer stacking characteristics from both RP and DJ structural types,s howing a( 1 = 2 ,0 ) displacement.…”

Section: Angewandte Chemiementioning

confidence: 99%

Hybrid Halide Perovskites: Discussions on Terminology and Materials

Mercier

2019

Angew Chem Int Ed

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hybrid perovskites ·l ayered perovskites · lead and iodide deficient 3D hybrid perovskite · perovskites ·R uddlesden-Popper Abstract: Hybrid halide perovskites (HP) have emerged in the last decade as an ew class of semiconductors with superior performances in photovoltaic and electronic devices.T he literature about these halide semiconductors is abundant and al ot of names/expressions are used to define networks, structures,ormaterials.Inthis context, there is aneed to offer some discussions about the relevance of using the word "perovskite" and the associated expressions ("RP" (Ruddlesden-Popper), "DJ" (Dion-Jacobson), "ACI" (alternating cations in the interlayer space), "hexagonal perovskites", "hollow perovskites", "d-HP" (deficient 3D HP),…). Moreover,t he description of perovskite networks through elimination/substitution processes from the ABX 3 structure will be compared to the knownd imensional reduction concept.

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Luminescent and Photoconductive Layered Lead Halide Perovskite Compounds Comprising Mixtures of Cesium and Guanidinium Cations

Cited by 133 publications

References 80 publications

Highly Sensitive and Ultrafast Responding Array Photodetector Based on a Newly Tailored 2D Lead Iodide Perovskite Crystal

Highly Sensitive and Ultrafast Responding Array Photodetector Based on a Newly Tailored 2D Lead Iodide Perovskite Crystal

Essential Amino Acid–Enabled Lead Bromide Perovskite Nanocrystals with High Stability

Hybrid Halide Perovskites: Discussions on Terminology and Materials

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