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Lead-Free Double Perovskite Cs2AgInCl6.

Zhiguo Xia, Ying Liu, Angshuman Nag, Liberato Manna,

Lead-free halide perovskites have drawn wide attention for the recent attempts to find alternative solutions to the toxic and poorly stable lead-based counterparts. Among them, double perovskites with Cs 2 AgInCl 6 composition, often doped with various elements, have been under the spotlight for their intriguing optical properties, viz., self-trapped ... Read more >>

Angew Chem Int Ed Engl (Angewandte Chemie (International ed. in English))
[2020, :]

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Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals

Stefano Toso, Dmitry Baranov, Davide Altamura, Francesco Scattarella, Jakob Dahl, Xingzhi Wang, Sergio Marras, Paul Alivisatos, Andrej Singer, Cinzia Giannini, Liberato Manna,

Colloidal superlattices are fascinating materials made of ordered nanocrystals, yet they are rarely called “atomically precise.” That is unsurprising, given how challenging it is to quantify the degree of structural order in these materials. However, once that order crosses a certain threshold, constructive interference of X-rays diffracted by the nanocrystals ... Read more >>

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0D Nanocrystals as Light-Driven, Localized Charge Injection Sources for the Contactless Manipulation of Atomically Thin 2D Materials

Ilka Kriegel, Michele Ghini, Emanuil Sashev Yanev, Christoph Kastl, Adam Jansons, Brandon Crockett, Kristopher Koskela, Edward Barnard, Erika Penzo, James Evan Hutchison, Joshua. Robinson, Liberato Manna, Nicholas Borys, James Schuck,

We report a new localized and electrodeless charge injection scheme that quasi-permanently modifies monolayer (1L-)MoS2 doping levels to extents competing with electrostatic gating. The key innovation is to use Sn-doped In2O3 (ITO) nanocrystals (NCs) as contactless light-driven charge injection sources triggered solely by light. Each nanocrystal can store and transfer ... Read more >>

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Alloy CsCdxPb1-xBr3 Perovskite Nanocrystals: The Role of Surface Passivation in Preserving Composition and Blue Emission

Muhammad Imran, Julien Ramade, Francesco Di Stasio, Manuela De Franco, Joka Buha, Sandra Van Aert, Luca Goldoni, Simone Lauciello, Mirko Prato, Ivan Infante, Sara Bals, Liberato Manna,

Various strategies have been proposed to engineer the band gap of metal halide perovskite nanocrystals (NCs) while preserving their structure and composition and thus ensuring spectral stability of the emission color. An aspect that has only been marginally investigated is how the type of surface passivation influences the structural/color stability ... Read more >>

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Simple fabrication of layered halide perovskite platelets and enhanced photoluminescence from mechanically exfoliated flakes.

Balaji Dhanabalan, Andrea Castelli, Milan Palei, Davide Spirito, Liberato Manna, Roman Krahne, Milena Arciniegas,

Rapid progress on the fabrication of lead halide perovskite crystals has led to highly promising performance in optoelectronic devices, particularly from three-dimensional crystals. Recently, these efforts have been extended to layered perovskite structures, motivated in part by their good environmental stability. Furthermore, layered perovskites represent a nanocrystal system with micron-size ... Read more >>

Nanoscale (Nanoscale)
[2019, 11(17):8334-8342]

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O2 as a molecular probe for nonradiative surface defects in CsPbBr3 perovskite nanostructures and single crystals.

Carmelita Rodà, Ahmed L Abdelhady, Javad Shamsi, Monica Lorenzon, Valerio Pinchetti, Marina Gandini, Francesco Meinardi, Liberato Manna, Sergio Brovelli,

Lead halide perovskites, owing to their flexible, scalable chemistry and promising physical properties are attracting increasing attention for solution-processed optoelectronic and photonic technologies. Despite their well-known 'defect tolerant' electronic structure, studies highlighted the active role of shallow and deep defect states, as well as of oxidative environmental conditions, on the ... Read more >>

Nanoscale (Nanoscale)
[2019, 11(16):7613-7623]

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X-ray ptychographic mode of self-assembled CdSe/CdS octapod-shaped nanocrystals in thick polymers.

Liberato De Caro, Francesco Scattarella, Davide Altamura, Milena P Arciniegas, Dritan Siliqi, Liberato Manna, Cinzia Giannini,

This work describes the application of X-ray ptychography for the inspection of complex assemblies of highly anisotropic nanocrystals embedded in a thick polymer matrix. More specifically, this case deals with CdSe/CdS octapods, with pod length L = 39 ± 2 nm and pod diameter D = 12 ± 2 nm, dispersed in ... Read more >>

J Appl Crystallogr (Journal of applied crystallography)
[2020, 53(Pt 3):741-747]

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Bright Blue Emitting Cu-doped Cs2ZnCl4 Colloidal Nanocrystals

Dongxu Zhu, Valerio Pinchetti, Rosaria Brescia, Fabrizio Moro, Marco Fanciulli, Aiwei Tang, Ivan Infante, Luca De Trizio, Sergio Brovelli, Liberato Manna,

We report here the synthesis of undoped and Cu-doped Cs<sub>2</sub>ZnCl<sub>4</sub> nanocrystals (NCs), in which we could tune the concentration of Cu from 0.7% to 7.5%. According to electron paramagnetic resonance analysis, in 0.7% and 2.1% Cu-doped NCs the Cu ions were present in the +1 oxidation state only, while in ... Read more >>

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Nanocrystals of Lead Chalcohalides: A Series of Kinetically Trapped Metastable Nanostructures.

Stefano Toso, Quinten A Akkerman, Beatriz Martín-García, Mirko Prato, Juliette Zito, Ivan Infante, Zhiya Dang, Anna Moliterni, Cinzia Giannini, Eva Bladt, Ivan Lobato, Julien Ramade, Sara Bals, Joka Buha, Davide Spirito, Enrico Mugnaioli, Mauro Gemmi, Liberato Manna,

We report the colloidal synthesis of a series of surfactant-stabilized lead chalcohalide nanocrystals. Our work is mainly focused on Pb4S3Br2, a chalcohalide phase unknown to date that does not belong to the ambient-pressure PbS-PbBr2 phase diagram. The Pb4S3Br2 nanocrystals herein feature a remarkably narrow size distribution (with a size dispersion ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2020, 142(22):10198-10211]

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Directional Anisotropy of the Vibrational Modes in 2D-Layered Perovskites.

Balaji Dhanabalan, Yu-Chen Leng, Giulia Biffi, Miao-Ling Lin, Ping-Heng Tan, Ivan Infante, Liberato Manna, Milena P Arciniegas, Roman Krahne,

The vibrational modes in organic/inorganic layered perovskites are of fundamental importance for their optoelectronic properties. The hierarchical architecture of the Ruddlesden-Popper phase of these materials allows for distinct directionality of the vibrational modes with respect to the main axes of the pseudocubic lattice in the octahedral plane. Here, we study ... Read more >>

ACS Nano (ACS nano)
[2020, 14(4):4689-4697]

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Nanocrystals of Lead Chalcohalides: A Series of Kinetically Trapped Metastable Nanostructures

Stefano Toso, Quinten Akkerman, Beatriz Martín-García, Mirko Prato, Juliette Zito, Ivan Infante, Zhiya Dang, Anna Moliterni, Cinzia Giannini, Eva Bladt, Ivan Lobato, Julien Ramade, Joka Buha, Sara Baals, Davide Spirito, Enrico Mugnaioli, mauro gemmi, Liberato Manna,

We report the colloidal synthesis of a series of surfactant-stabilized lead chalcohalide nanocrystals. Our work is mainly focused on Pb<sub>4</sub>S<sub>3</sub>Br<sub>2</sub>, a chalco-halide phase unknown to date that does not belong to the ambient-pressure PbS – PbBr<sub>2</sub> phase diagram. The Pb<sub>4</sub>S<sub>3</sub>Br<sub>2</sub> nanocrystals herein feature a remarkably narrow size distribution (with a ... Read more >>

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Transforming colloidal Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) into stable CsPbBr3 perovskite emitters through intermediate heterostructures.

Dmitry Baranov, Gianvito Caputo, Luca Goldoni, Zhiya Dang, Riccardo Scarfiello, Luca De Trizio, Alberto Portone, Filippo Fabbri, Andrea Camposeo, Dario Pisignano, Liberato Manna,

The preparation of strongly emissive CsPbBr3 perovskite nanocrystals with robust surface passivation is a challenge in the field of lead halide perovskite nanomaterials. We report an approach to prepare polymer-capped CsPbBr3 perovskite nanocrystals by reacting oleylammonium/oleate-capped Cs4PbBr6 nanocrystals with poly(maleic anhydride-alt-1-octadecene) (PMAO). PMAO contains succinic anhydride units that are reactive ... Read more >>

Chem Sci (Chemical science)
[2020, 11(15):3986-3995]

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Composition-, Size-, and Surface Functionalization-Dependent Optical Properties of Lead Bromide Perovskite Nanocrystals.

Palvasha Ijaz, Muhammad Imran, Márcio M Soares, Hélio C N Tolentino, Beatriz Martín-García, Cinzia Giannini, Iwan Moreels, Liberato Manna, Roman Krahne,

The photoluminescence (PL), color purity, and stability of lead halide perovskite nanocrystals depend critically on surface passivation. We present a study on the temperature-dependent PL and PL decay dynamics of lead bromide perovskite nanocrystals characterized by different types of A cations, surface ligands, and nanocrystal sizes. Throughout, we observe a ... Read more >>

J Phys Chem Lett (The journal of physical chemistry letters)
[2020, 11(6):2079-2085]

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Transforming Colloidal Cs4PbBr6 Nanocrystals by Poly(maleic anhydride-alt-1-octadecene) into Stable CsPbBr3 Perovskite Emitters Through Intermediate Heterostructures

Dmitry Baranov, Gianvito Caputo, Luca Goldoni, Zhiya Dang, Riccardo Scarfiello, Luca De Trizio, Alberto Portone, Filippo Fabbri, Andrea Camposeo, Dario Pisignano, Liberato Manna,

The preparation of strongly emissive CsPbBr<sub>3</sub> perovskite nanocrystals with a robust surface passivation is a challenge in the field of lead halide perovskite nanomaterials. We report an approach to prepare polymer-capped CsPbBr<sub>3</sub> perovskite nanocrystals by reacting oleylammonium/oleate-capped Cs<sub>4</sub>PbBr<sub>6</sub> nanocrystals with poly(maleic anhydride-alt-1-octadecene) (PMAO). PMAO contains succinic anhydride units that are ... Read more >>

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Nano- and microscale apertures in metal films fabricated by colloidal lithography with perovskite nanocrystals.

Davide Spirito, Javad Shamsi, Muhammad Imran, Quinten A Akkermann, Liberato Manna, Roman Krahne,

We demonstrate patterning of metal surfaces based on lift-off of perovskite nanocrystals that enables the fabrication of nanometer-size features without the use of resist-based nanolithography. The perovskite nanocrystals act as templates for defining the shape of the apertures in metal layers, and we exploit the variety of sizes and shapes ... Read more >>

Nanotechnology (Nanotechnology)
[2020, 31(18):185304]

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Cs3Cu4In2Cl13 Nanocrystals: A Perovskite-Related Structure with Inorganic Clusters at A Sites.

Roman Kaiukov, Guilherme Almeida, Sergio Marras, Zhiya Dang, Dmitry Baranov, Urko Petralanda, Ivan Infante, Enrico Mugnaioli, Andrea Griesi, Luca De Trizio, Mauro Gemmi, Liberato Manna,

An effort to synthesize the Cu(I) variant of a lead-free double perovskite isostructural with Cs2AgInCl6 resulted in the formation of Cs3Cu4In2Cl13 nanocrystals with an unusual structure, as revealed by single-nanocrystal three-dimensional electron diffraction. These nanocrystals adopt a A2BX6 structure (K2PtCl6 type, termed vacancy ordered perovskite) with tetrahedrally coordinated Cu(I) ions. ... Read more >>

Inorg Chem (Inorganic chemistry)
[2020, 59(1):548-554]

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CsPbX3/SiOx (X = Cl, Br, I) monoliths prepared via a novel sol-gel route starting from Cs4PbX6 nanocrystals.

Sungwook Park, Mai Ngoc An, Guilherme Almeida, Francisco Palazon, Davide Spirito, Roman Krahne, Zhiya Dang, Luca De Trizio, Liberato Manna,

We developed a facile synthesis of nanocomposite powders of CsPbX3 nanocrystals (NCs) embedded in silica. The synthesis starts from colloidal Cs4PbX6 NCs that are mixed with tetraethyl orthosilicate in the presence of nitric acid, which triggers the sol-gel reaction yielding the formation of SiOx and the conversion of starting NCs ... Read more >>

Nanoscale (Nanoscale)
[2019, 11(40):18739-18745]

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Tunable Near-Infrared Localized Surface Plasmon Resonance of F, In-Codoped CdO Nanocrystals.

Roberto Giannuzzi, Francesco De Donato, Luca De Trizio, Anna Grazia Monteduro, Giuseppe Maruccio, Riccardo Scarfiello, Antonio Qualtieri, Liberato Manna,

Nanocrystals (NCs) of transparent conducting oxides with a localized surface plasmon resonance (LSPR) in the near-infrared (NIR) spectral region show promising electrochromic properties for the development of a new generation of dynamic "smart windows". In this regard, we exploit thin films of F, In-codoped CdO (FICO) NCs as active coatings ... Read more >>

ACS Appl Mater Interfaces (ACS applied materials & interfaces)
[2019, 11(43):39921-39929]

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HfN Nanoparticles: An Unexplored Catalyst for the Electrocatalytic Oxygen Evolution Reaction.

Chiara Defilippi, Dipak V Shinde, Zhiya Dang, Liberato Manna, Christopher Hardacre, Adam J Greer, Carmine D'Agostino, Cristina Giordano,

Water electrolysis is one of the most promising methods to produce H2 and O2 as high potential fuels. Comparing the two half-reactions, the oxygen evolution reaction (OER) is the more difficult to be optimized and still relies on expensive noble metal-based catalysts such as Ru or Ir. In this paper, ... Read more >>

Angew Chem Int Ed Engl (Angewandte Chemie (International ed. in English))
[2019, 58(43):15464-15470]

Cited: 2 times

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Stable Ligand Coordination at the Surface of Colloidal CsPbBr3 Nanocrystals.

Danila Quarta, Muhammad Imran, Agostina-Lina Capodilupo, Urko Petralanda, Bas van Beek, Filippo De Angelis, Liberato Manna, Ivan Infante, Luca De Trizio, Carlo Giansante,

Ruling over the surface chemistry of metal halide perovskite nanocrystals (NCs) is crucial to access reliable luminophores. Here, we provide an atomic-level description of the surface of colloidal CsPbBr3 NCs, achieving an effective passivation strategy that leads to near-unity photoluminescence quantum yield. To this end, we used two different types ... Read more >>

J Phys Chem Lett (The journal of physical chemistry letters)
[2019, 10(13):3715-3726]

Cited: 1 time

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Resurfacing halide perovskite nanocrystals.

Guilherme Almeida, Ivan Infante, Liberato Manna,

Science (Science (New York, N.Y.))
[2019, 364(6443):833-834]

Cited: 3 times

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Ultrafast THz Probe of Photoinduced Polarons in Lead-Halide Perovskites.

Eugenio Cinquanta, Daniele Meggiolaro, Silvia G Motti, Marina Gandini, Marcelo J P Alcocer, Quinten A Akkerman, Caterina Vozzi, Liberato Manna, Filippo De Angelis, Annamaria Petrozza, Salvatore Stagira,

We study the nature of photoexcited charge carriers in CsPbBr_{3} nanocrystal thin films by ultrafast optical pump-THz probe spectroscopy. We observe a deviation from a pure Drude dispersion of the THz dielectric response that is ascribed to the polaronic nature of carriers; a transient blueshift of observed phonon frequencies is ... Read more >>

Phys. Rev. Lett. (Physical review letters)
[2019, 122(16):166601]

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Revealing Photoluminescence Modulation from Layered Halide Perovskite Microcrystals upon Cyclic Compression.

Andrea Castelli, Giulia Biffi, Luca Ceseracciu, Davide Spirito, Mirko Prato, Davide Altamura, Cinzia Giannini, Sergey Artyukhin, Roman Krahne, Liberato Manna, Milena P Arciniegas,

Halide perovskites show promise for high-efficiency solar energy conversion and light-emitting diode devices owing to their bandgap, which falls within the visible optical range. However, due to their rigidity, GPa pressures are necessary to control the complex interplay between their electronic and crystallographic structure. Layered perovskites are likely to be ... Read more >>

Adv. Mater. Weinheim (Advanced materials (Deerfield Beach, Fla.))
[2019, 31(1):e1805608]

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Shape-Pure, Nearly Monodispersed CsPbBr3 Nanocubes Prepared Using Secondary Aliphatic Amines.

Muhammad Imran, Palvasha Ijaz, Dmitry Baranov, Luca Goldoni, Urko Petralanda, Quinten Akkerman, Ahmed L Abdelhady, Mirko Prato, Paolo Bianchini, Ivan Infante, Liberato Manna,

Fully inorganic cesium lead halide perovskite (CsPbX3) nanocrystals (NCs) have been extensively studied due to their excellent optical properties, especially their high photoluminescence quantum yield (PLQY) and the ease with which the PL can be tuned across the visible spectrum. So far, most strategies for synthesizing CsPbX3 NCs are highly ... Read more >>

Nano Lett. (Nano letters)
[2018, 18(12):7822-7831]

Cited: 5 times

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Colloidal Synthesis of Double Perovskite Cs2AgInCl6 and Mn-Doped Cs2AgInCl6 Nanocrystals.

Federico Locardi, Matilde Cirignano, Dmitry Baranov, Zhiya Dang, Mirko Prato, Filippo Drago, Maurizio Ferretti, Valerio Pinchetti, Marco Fanciulli, Sergio Brovelli, Luca De Trizio, Liberato Manna,

We show here the first colloidal synthesis of double perovskite Cs2AgInCl6 nanocrystals (NCs) with a control over their size distribution. In our approach, metal carboxylate precursors and ligands (oleylamine and oleic acid) are dissolved in diphenyl ether and reacted at 105 °C with benzoyl chloride. The resulting Cs2AgInCl6 NCs exhibit ... Read more >>

J Am Chem Soc (Journal of the American Chemical Society)
[2018, 140(40):12989-12995]

Cited: 3 times

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