1
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Wang K, Ecker BR, Ghosh M, Li M, Karasiev VV, Hu SX, Huang J, Gao Y. Light-enhanced oxygen degradation of MAPbBr 3 single crystal. Phys Chem Chem Phys 2024; 26:5027-5037. [PMID: 38258478 DOI: 10.1039/d3cp03493c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Organometal halide perovskites are promising materials for optoelectronic applications, whose commercial realization depends critically on their stability under multiple environmental factors. In this study, a methylammonium lead bromide (MAPbBr3) single crystal was cleaved and exposed to simultaneous oxygen and light illumination under ultrahigh vacuum (UHV). The exposure process was monitored using X-ray photoelectron spectroscopy (XPS) with precise control of the exposure time and oxygen pressure. It was found that the combination of oxygen and light accelerated the degradation of MAPbBr3, which could not be viewed as a simple addition of that by oxygen-only and light-only exposures. The XPS spectra showed significant loss of carbon, bromine, and nitrogen at an oxygen exposure of 1010 Langmuir with light illumination, approximately 17 times of the additive effects of oxygen-only and light-only exposures. It was also found that the photoluminescence (PL) emission was much weakened by oxygen and light co-exposure, while previous reports had shown that PL was substantially enhanced by oxygen-only exposure. Measurements using a scanning electron microscope (SEM) and focused ion beam (FIB) demonstrated that the crystal surface was much roughened by the co-exposure. Density functional theory (DFT) calculations revealed the formation of superoxide and oxygen induced gap state, suggesting the creation of oxygen radicals by light illumination as a possible microscopic driving force for enhanced degradation.
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Affiliation(s)
- Ke Wang
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA.
| | - Benjamin R Ecker
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA.
| | - Maitrayee Ghosh
- Laboratory for Laser Energetics (LLE), University of Rochester, Rochester, NY 14623, USA
| | - Mingze Li
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Valentin V Karasiev
- Laboratory for Laser Energetics (LLE), University of Rochester, Rochester, NY 14623, USA
| | - S X Hu
- Laboratory for Laser Energetics (LLE), University of Rochester, Rochester, NY 14623, USA
| | - Jinsong Huang
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Yongli Gao
- Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA.
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2
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Ryu HJ, Shin M, Park M, Lee JS. In Situ Tetraalkylammonium Ligand Engineering of Organic-Inorganic Hybrid Perovskite Nanoparticles for Enhancing Long-Term Stability and Optical Tunability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13448-13455. [PMID: 36288550 DOI: 10.1021/acs.langmuir.2c01888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Organic-inorganic hybrid perovskite nanoparticles (OIHP NPs) have attracted scientific attention owing to their efficient photoluminescence with optical tunability, which is highly advantageous for optoelectronic applications. However, the limited long-term stability of OIHP NPs has significantly hindered their practical application. Despite several synthetic strategies and encapsulation methods to stabilize OIHP NPs, complicated multi-step procedures are often required. In this study, we introduce an in situ ligand engineering method for stabilizing and controlling the optical properties of OIHP NPs using tetraalkylammonium (TAA) halides with various molecular structures at different concentrations. Our one-pot ligand engineering substantially enhanced the stability of the OIHP NPs without post-synthetic processes. Moreover, in certain cases, approximately 90% of the initial photoluminescence (PL) intensity was preserved even after a month under ambient conditions (room temperature, 20-50% relative humidity). To determine the role of ligand engineering in stabilizing the OIHP NPs, the surface binding properties of the TAA ligands were thoroughly analyzed using Raman spectroscopy. Specifically, the permanent positive charge of the TAA cations and consequent effective electrostatic interactions with the surfaces of the OIHP NPs are pivotal for preserving the initial PL intensity. Our investigation is beneficial for developing OIHP nanomaterials with improved stability and controlled photoluminescence for various optoelectronic applications, such as light-emitting devices, photosensitizers, photodetectors, photocatalysis, and solar cells.
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Affiliation(s)
- Han-Jung Ryu
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Mingyeong Shin
- Department of Chemistry, Dong-A University, 37 Nakdong-daero 550beon-gil, Saha-gu, Busan 49315, Republic of Korea
- Department of Chemistry, College of Natural Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
| | - Myeongkee Park
- Department of Chemistry, College of Natural Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
| | - Jae-Seung Lee
- Department of Materials Science and Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
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3
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Cevallos‐Toledo RB, Rosa‐Pardo I, Arenal R, Oestreicher V, Fickert M, Abellán G, Galian RE, Pérez‐Prieto J. Ruddlesden–Popper Hybrid Lead Bromide Perovskite Nanosheets of Phase Pure
n
=2: Stabilized Colloids Stored in the Solid State. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202113451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rita B. Cevallos‐Toledo
- Institute of Molecular Science University of Valencia c/ Catedrático José Beltrán 2 Paterna Spain
| | - Ignacio Rosa‐Pardo
- Institute of Molecular Science University of Valencia c/ Catedrático José Beltrán 2 Paterna Spain
| | - Raul Arenal
- Laboratorio de Microscopias Avanzadas (LMA) U. Zaragoza Mariano Esquillor s/n 50018 Zaragoza Spain
- Instituto de Nanociencia y Materiales de Aragon (INMA) CSIC-U. de Zaragoza Calle Pedro Cerbuna 12 50009 Zaragoza Spain
- ARAID Foundation 50018 Zaragoza Spain
| | - Víctor Oestreicher
- Institute of Molecular Science University of Valencia c/ Catedrático José Beltrán 2 Paterna Spain
| | - Michael Fickert
- Department of Chemistry and Pharmacy, Chair of Organic Chemistry II and Joint Institute of Advanced Materials and Processes (ZMP) Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Nikolaus-Fiebiger Strasse 10 90762 Erlangen Germany
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Dr.-Mack Strasse 81 90762 Fürth Germany
| | - Gonzalo Abellán
- Institute of Molecular Science University of Valencia c/ Catedrático José Beltrán 2 Paterna Spain
| | - Raquel E. Galian
- Institute of Molecular Science University of Valencia c/ Catedrático José Beltrán 2 Paterna Spain
| | - Julia Pérez‐Prieto
- Institute of Molecular Science University of Valencia c/ Catedrático José Beltrán 2 Paterna Spain
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4
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Locardi F, Samoli M, Martinelli A, Erdem O, Magalhaes DV, Bals S, Hens Z. Cyan Emission in Two-Dimensional Colloidal Cs 2CdCl 4:Sb 3+ Ruddlesden-Popper Phase Nanoplatelets. ACS NANO 2021; 15:17729-17737. [PMID: 34668701 PMCID: PMC8613908 DOI: 10.1021/acsnano.1c05684] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Metal halide perovskites are one of the most investigated materials in optoelectronics, with their lead-based counterparts being renowned for their enhanced optoelectronic performance. The 3D CsPbX3 structure has set the standard with many studies currently attempting to substitute lead with other metals while retaining the properties of this material. This effort has led to the fabrication of metal halides with lower dimensionality, wherein particular 2D layered perovskite structures have captured attention as inspiration for the next generation of colloidal semiconductors. Here we report the synthesis of the Ruddlesden-Popper Cs2CdCl4:Sb3+ phase as colloidal nanoplatelets (NPs) using a facile hot injection approach under atmospheric conditions. Through strict adjustment of the synthesis parameters with emphasis on the ligand ratio, we obtained NPs with a relatively uniform size and good morphological control. The particles were characterized through transmission electron microscopy, synchrotron X-ray diffraction, and pair distribution function analysis. The spectroscopic characterization revealed most strikingly an intense cyan emission under UV excitation with a measured PLQY of ∼20%. The emission was attributed to the Sb3+-doping within the structure.
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Affiliation(s)
- Federico Locardi
- Department
of Chemistry and Industrial Chemistry, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
| | - Margarita Samoli
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
| | | | - Onur Erdem
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
| | - Debora Vale Magalhaes
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Sara Bals
- EMAT
and NANOlab Center of Excellence, University
of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Zeger Hens
- Physics
and Chemistry of Nanostructures group (PCN), Ghent University, Krijgslaan 281, Gent 9000, Belgium
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5
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Cevallos-Toledo RB, Rosa-Pardo I, Arenal R, Oestreicher V, Fickert M, Abellán G, Galian RE, Pérez-Prieto J. Ruddlesden-Popper Hybrid Lead Bromide Perovskite Nanosheets of Phase Pure n=2: Stabilized Colloids Stored in the Solid State. Angew Chem Int Ed Engl 2021; 60:27312-27317. [PMID: 34672406 PMCID: PMC9298809 DOI: 10.1002/anie.202113451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Indexed: 11/08/2022]
Abstract
Ruddlesden‐Popper lead halide perovskite (RP‐LHP) nano‐nanostructures can be regarded as self‐assembled quantum wells or superlattices of 3D perovskites with an intrinsic quantum well thickness of a single or a few (n=2‐4) lead halide layers; the quantum wells are separated by organic layers. They can be scaled down to a single quantum well dimension. Here, the preparation of highly (photo)chemical and colloidal stable hybrid LHP nanosheets (NSs) of ca. 7.4 μm lateral size and 2.5 nm quantum well height (thereby presenting a deep blue emission at ca. 440 nm), is reported for the first time. The NSs are close‐lying and they even interconnect when deposited on a substrate. Their synthesis is based on the use of the p‐toluenesulfonic acid/dodecylamine (pTS/DDA) ligand pair and their (photo)chemical stability and photoluminescence is enhanced by adding EuBr2 nanodots (EuNDs). Strikingly, they can be preserved as a solid and stored for at least one year. The blue emissive colloid can be recovered from the solid as needed by simply dispersing the powder in toluene and then using it to prepare solid films, making them very promising candidates for manufacturing devices.
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Affiliation(s)
- Rita B Cevallos-Toledo
- Institute of Molecular Science, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Spain
| | - Ignacio Rosa-Pardo
- Institute of Molecular Science, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Spain
| | - Raul Arenal
- Laboratorio de Microscopias Avanzadas (LMA), U. Zaragoza, Mariano Esquillor s/n, 50018, Zaragoza, Spain.,Instituto de Nanociencia y Materiales de Aragon (INMA), CSIC-U. de Zaragoza, Calle Pedro Cerbuna 12, 50009, Zaragoza, Spain.,ARAID Foundation, 50018, Zaragoza, Spain
| | - Víctor Oestreicher
- Institute of Molecular Science, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Spain
| | - Michael Fickert
- Department of Chemistry and Pharmacy, Chair of Organic Chemistry II and Joint Institute of Advanced Materials and Processes (ZMP), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Nikolaus-Fiebiger Strasse 10, 90762, Erlangen, Germany.,Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Dr.-Mack Strasse 81, 90762, Fürth, Germany
| | - Gonzalo Abellán
- Institute of Molecular Science, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Spain
| | - Raquel E Galian
- Institute of Molecular Science, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Spain
| | - Julia Pérez-Prieto
- Institute of Molecular Science, University of Valencia, c/ Catedrático José Beltrán 2, Paterna, Spain
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6
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Ye J, Byranvand MM, Martínez CO, Hoye RLZ, Saliba M, Polavarapu L. Defect Passivation in Lead-Halide Perovskite Nanocrystals and Thin Films: Toward Efficient LEDs and Solar Cells. Angew Chem Int Ed Engl 2021; 60:21636-21660. [PMID: 33730428 PMCID: PMC8518834 DOI: 10.1002/anie.202102360] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Indexed: 11/16/2022]
Abstract
Lead-halide perovskites (LHPs), in the form of both colloidal nanocrystals (NCs) and thin films, have emerged over the past decade as leading candidates for next-generation, efficient light-emitting diodes (LEDs) and solar cells. Owing to their high photoluminescence quantum yields (PLQYs), LHPs efficiently convert injected charge carriers into light and vice versa. However, despite the defect-tolerance of LHPs, defects at the surface of colloidal NCs and grain boundaries in thin films play a critical role in charge-carrier transport and nonradiative recombination, which lowers the PLQYs, device efficiency, and stability. Therefore, understanding the defects that play a key role in limiting performance, and developing effective passivation routes are critical for achieving advances in performance. This Review presents the current understanding of defects in halide perovskites and their influence on the optical and charge-carrier transport properties. Passivation strategies toward improving the efficiencies of perovskite-based LEDs and solar cells are also discussed.
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Affiliation(s)
- Junzhi Ye
- Cavendish LaboratoryUniversity of Cambridge19, JJ Thomson AvenueCambridgeCB3 0HEUK
| | - Mahdi Malekshahi Byranvand
- Institute for Photovoltaics (ipv)University of StuttgartPfaffenwaldring 4770569StuttgartGermany
- Helmholtz Young Investigator Group FRONTRUNNERIEK5-PhotovoltaikForschungszentrum Jülich52425JülichGermany
| | - Clara Otero Martínez
- CINBIOUniversidade de VigoMaterials Chemistry and Physics GroupDepartment of Physical ChemistryCampus Universitario Lagoas, Marcosende36310VigoSpain
| | - Robert L. Z. Hoye
- Department of MaterialsImperial College LondonExhibition RoadLondonSW7 2AZUK
| | - Michael Saliba
- Institute for Photovoltaics (ipv)University of StuttgartPfaffenwaldring 4770569StuttgartGermany
- Helmholtz Young Investigator Group FRONTRUNNERIEK5-PhotovoltaikForschungszentrum Jülich52425JülichGermany
| | - Lakshminarayana Polavarapu
- CINBIOUniversidade de VigoMaterials Chemistry and Physics GroupDepartment of Physical ChemistryCampus Universitario Lagoas, Marcosende36310VigoSpain
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7
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Ye J, Byranvand MM, Martínez CO, Hoye RLZ, Saliba M, Polavarapu L. Defect Passivation in Lead‐Halide Perovskite Nanocrystals and Thin Films: Toward Efficient LEDs and Solar Cells. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102360] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Junzhi Ye
- Cavendish Laboratory University of Cambridge 19, JJ Thomson Avenue Cambridge CB3 0HE UK
| | - Mahdi Malekshahi Byranvand
- Institute for Photovoltaics (ipv) University of Stuttgart Pfaffenwaldring 47 70569 Stuttgart Germany
- Helmholtz Young Investigator Group FRONTRUNNER IEK5-Photovoltaik Forschungszentrum Jülich 52425 Jülich Germany
| | - Clara Otero Martínez
- CINBIO Universidade de Vigo Materials Chemistry and Physics Group Department of Physical Chemistry Campus Universitario Lagoas, Marcosende 36310 Vigo Spain
| | - Robert L. Z. Hoye
- Department of Materials Imperial College London Exhibition Road London SW7 2AZ UK
| | - Michael Saliba
- Institute for Photovoltaics (ipv) University of Stuttgart Pfaffenwaldring 47 70569 Stuttgart Germany
- Helmholtz Young Investigator Group FRONTRUNNER IEK5-Photovoltaik Forschungszentrum Jülich 52425 Jülich Germany
| | - Lakshminarayana Polavarapu
- CINBIO Universidade de Vigo Materials Chemistry and Physics Group Department of Physical Chemistry Campus Universitario Lagoas, Marcosende 36310 Vigo Spain
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8
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Al Ghaithi AO, Aravindh SA, Hedhili MN, Ng TK, Ooi BS, Najar A. Optical Properties and First-Principles Study of CH 3NH 3PbBr 3 Perovskite Structures. ACS OMEGA 2020; 5:12313-12319. [PMID: 32548414 PMCID: PMC7271361 DOI: 10.1021/acsomega.0c01044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Solution-processed organic-inorganic hybrid perovskites have attracted attention as light-harvesting materials for solar cells and photonic applications. The present study focuses on cubic single crystals and microstructures of CH3NH3PbBr3 perovskite fabricated by a one-step solution-based self-assembly method. It is seen that, in addition to the nucleation from the precursor solution, crystallization occurs when the solution is supersaturated, followed by the formation of a small nucleus of CH3NH3PbBr3 that self-assembles into bigger hollow cubes. A three-dimensional (3D) fluorescence microscopy investigation of hollow cubes confirmed the formation of hollow plates on the bottom; then, the growth starts from the perimeter and propagates to the center of the cube. Furthermore, the growth in the (001) direction follows a layer-by-layer growth model to form a complete cube, confirmed by scanning electronic microscopy (SEM) observations. Two-dimensional (2D)-3D fluorescence microscopy and photoluminescence (PL) measurements confirm a peak emission at 535 nm. To get more insights into the structural and optical properties, density functional theory (DFT) simulations were conducted. The electronic and optical properties calculated by DFT are in agreement with the obtained experimental values. The density-of-state (DOS) calculations revealed that the valence band maximum (VBM) consists of states contributed by Br and Pb, which agrees with the X-ray photoelectron spectroscopy valence band (XPS VB) measurements.
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Affiliation(s)
- Asma O. Al Ghaithi
- Department
of Physics, College of Science, United Arab
Emirates University, Al Ain 15551, UAE
| | - S. Assa Aravindh
- Nano
and Molecular Systems Research Unit, University
of Oulu, P.O. Box 8000, FI-90014 Oulu, Finland
| | - Mohamed N. Hedhili
- King
Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Tien Khee Ng
- King
Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Boon S. Ooi
- King
Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Adel Najar
- Department
of Physics, College of Science, United Arab
Emirates University, Al Ain 15551, UAE
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9
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Wang X, Liu S, Zhao B, Liu H, Li X. Study on the Ultrafast Process of Perovskite Nanoparticles Modified by Different Alkyl Chains. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1507-1514. [PMID: 32005053 DOI: 10.1021/acs.langmuir.9b03242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three kinds of perovskite nanoparticles encapsulated with different chain lengths of alkylammonium, (CH3NH3)x(CH3(CH2)3NH3)(1-x)PbBr3 (NP-C4), (CH3NH3)x(CH3(CH2)7NH3)(1-x)PbBr3 (NP-C8), and (CH3NH3)x(CH3(CH2)11NH3)(1-x)PbBr3 (NP-C12), are successfully prepared. X-ray powder diffraction experiments demonstrate that these three nanoparticles are all pure cubic phase. However, the compositions of these three nanoparticles are significantly different, as revealed by steady-state absorption spectra. NP-C4 mainly consists of 2D perovskite with m (number of unit cell layers) = 1 and 3D perovskite. Instead, NP-C8 and NP-C12 are mainly composed of 2D perovskite with m = 3, 4, and 5. Time-resolved fluorescence spectra and femtosecond transient absorption spectra suggest the presence of energy transfer from 2D perovskite to 3D perovskite in these three nanoparticles. More importantly, the energy-transfer rate gradually decreases from NP-C4 to NP-C12. This result suggests that the composition of perovskite nanoparticles and their corresponding photophysical properties can be controlled by the chain length of alkylammonium. This provides a new insight for preparing novel perovskite nanoparticles for special applications.
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Affiliation(s)
- Xiangyang Wang
- College of Science , China University of Petroleum (East China) , Qingdao , Shandong 266580 , China
| | - Shanshan Liu
- College of Science , China University of Petroleum (East China) , Qingdao , Shandong 266580 , China
| | - Baohua Zhao
- College of Science , China University of Petroleum (East China) , Qingdao , Shandong 266580 , China
| | - Heyuan Liu
- Institute of New Energy , China University of Petroleum (East China) , Qingdao , Shandong 266580 , China
| | - Xiyou Li
- School of Materials Science and Engineering , China University of Petroleum (East China) , Qingdao , Shandong 266580 , China
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10
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Rosa-Pardo I, Casadevall C, Schmidt L, Claros M, Galian RE, Lloret-Fillol J, Pérez-Prieto J. The synergy between the CsPbBr3 nanoparticle surface and the organic ligand becomes manifest in a demanding carbon–carbon coupling reaction. Chem Commun (Camb) 2020; 56:5026-5029. [DOI: 10.1039/d0cc01339k] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cooperative action between the CsPbBr3 surface and capping makes the photoredox homo-/cross-coupling of benzyl bromides under mild conditions possible.
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Affiliation(s)
- Ignacio Rosa-Pardo
- Institute of Molecular Science (ICMol)
- University of Valencia c/Catedrático José Beltrán 2
- Paterna
- E46980 Valencia
- Spain
| | - Carla Casadevall
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology
- Avinguda Països Catalans 16
- 43007 Tarragona
- Spain
| | - Luciana Schmidt
- Institute of Molecular Science (ICMol)
- University of Valencia c/Catedrático José Beltrán 2
- Paterna
- E46980 Valencia
- Spain
| | - Miguel Claros
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology
- Avinguda Països Catalans 16
- 43007 Tarragona
- Spain
| | - Raquel E. Galian
- Institute of Molecular Science (ICMol)
- University of Valencia c/Catedrático José Beltrán 2
- Paterna
- E46980 Valencia
- Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology
- Avinguda Països Catalans 16
- 43007 Tarragona
- Spain
- Catalan Institution for Research and Advanced Studies (ICREA) Passeig Lluïs Companys, 23
| | - Julia Pérez-Prieto
- Institute of Molecular Science (ICMol)
- University of Valencia c/Catedrático José Beltrán 2
- Paterna
- E46980 Valencia
- Spain
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11
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Rosa-Pardo I, Pocoví-Martínez S, Arenal R, Galian RE, Pérez-Prieto J. Ultrathin lead bromide perovskite platelets spotted with europium(ii) bromide dots. NANOSCALE 2019; 11:18065-18070. [PMID: 31577322 DOI: 10.1039/c9nr06631d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We describe here the preparation of a novel nanohybrid comprising a two-layer cesium lead bromide nanoplatelet, [CsPbBr3]PbBr4 NPL, containing europium(ii) bromide (EuBr2) nanodots, by ultrasound/heating treatment of toluene dispersions of the CsPbBr3 nanomaterial in the presence of EuBr2 nanodots. The hybrid nanoplatelets exhibit strong excitonic and narrow emission peaks characteristic of ultrathin NPLs at 430 and 436 nm, respectively.
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Affiliation(s)
- Ignacio Rosa-Pardo
- Instituto de Ciencia Molecular (ICMol), University of Valencia, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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12
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Locardi F, Cirignano M, Baranov D, Dang Z, Prato M, Drago F, Ferretti M, Pinchetti V, Fanciulli M, Brovelli S, De Trizio L, Manna L. Colloidal Synthesis of Double Perovskite Cs 2AgInCl 6 and Mn-Doped Cs 2AgInCl 6 Nanocrystals. J Am Chem Soc 2018; 140:12989-12995. [PMID: 30198712 PMCID: PMC6284204 DOI: 10.1021/jacs.8b07983] [Citation(s) in RCA: 174] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
![]()
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 the expected double perovskite
crystal structure, are stable under air, and show a broad spectrum
white photoluminescence (PL) with quantum yield of ∼1.6 ±
1%. The optical properties of these NCs were improved by synthesizing
Mn-doped Cs2AgInCl6 NCs through the simple addition
of Mn-acetate to the reaction mixture. The NC products were characterized
by the same double perovskite crystal structure, and Mn doping levels
up to 1.5%, as confirmed by elemental analyses. The effective incorporation
of Mn ions inside Cs2AgInCl6 NCs was also proved
by means of electron spin resonance spectroscopy. A bright orange
emission characterized our Mn-doped Cs2AgInCl6 NCs with a PL quantum yield as high as ∼16 ± 4%.
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Affiliation(s)
- Federico Locardi
- Dipartimento di Chimica e Chimica Industriale , Università degli Studi di Genova , Via Dodecaneso 31 , 16146 Genova , Italy
| | | | | | | | | | | | - Maurizio Ferretti
- Dipartimento di Chimica e Chimica Industriale , Università degli Studi di Genova , Via Dodecaneso 31 , 16146 Genova , Italy
| | - Valerio Pinchetti
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via R. Cozzi 55 , 20125 Milano , Italy
| | - Marco Fanciulli
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via R. Cozzi 55 , 20125 Milano , Italy
| | - Sergio Brovelli
- Dipartimento di Scienza dei Materiali , Università degli Studi di Milano-Bicocca , via R. Cozzi 55 , 20125 Milano , Italy
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Milosavljević AR, Božanić DK, Sadhu S, Vukmirović N, Dojčilović R, Sapkota P, Huang W, Bozek J, Nicolas C, Nahon L, Ptasinska S. Electronic Properties of Free-Standing Surfactant-Capped Lead Halide Perovskite Nanocrystals Isolated in Vacuo. J Phys Chem Lett 2018; 9:3604-3611. [PMID: 29902010 DOI: 10.1021/acs.jpclett.8b01466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We report an investigation of lead halide perovskite CH3NH3PbBr3 nanocrystals and associated ligand molecules by combining several different state-of-the-art experimental techniques, including synchrotron radiation-based XPS and VUV PES of free-standing nanocrystals isolated in vacuum. By using this novel approach for perovskite materials, we could directly obtain complete band alignment to vacuum of both CH3NH3PbBr3 nanocrystals and the ligands widely used in their preparation. We discuss the possible influence of the ligand molecules to apparent perovskite properties, and we compare the electronic properties of nanocrystals to those of bulk material. The experimental results were supported by DFT calculations.
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Affiliation(s)
| | - Dušan K Božanić
- Synchrotron SOLEIL, l'Orme des Merisiers , Saint Aubin , BP48, 91192 Gif sur Yvette Cedex, France
- Vinča Institute of Nuclear Sciences , University of Belgrade , P.O. Box 522, 11001 Belgrade , Serbia
| | - Subha Sadhu
- Radiation Laboratory , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Nenad Vukmirović
- Scientific Computing Laboratory, Center for the Study of Complex Systems, Institute of Physics Belgrade , University of Belgrade , Pregrevica 118 , 11080 Belgrade , Serbia
| | - Radovan Dojčilović
- Vinča Institute of Nuclear Sciences , University of Belgrade , P.O. Box 522, 11001 Belgrade , Serbia
| | - Pitambar Sapkota
- Radiation Laboratory , University of Notre Dame , Notre Dame , Indiana 46556 , United States
- Department of Physics , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Weixin Huang
- Radiation Laboratory , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - John Bozek
- Synchrotron SOLEIL, l'Orme des Merisiers , Saint Aubin , BP48, 91192 Gif sur Yvette Cedex, France
| | - Christophe Nicolas
- Synchrotron SOLEIL, l'Orme des Merisiers , Saint Aubin , BP48, 91192 Gif sur Yvette Cedex, France
| | - Laurent Nahon
- Synchrotron SOLEIL, l'Orme des Merisiers , Saint Aubin , BP48, 91192 Gif sur Yvette Cedex, France
| | - Sylwia Ptasinska
- Radiation Laboratory , University of Notre Dame , Notre Dame , Indiana 46556 , United States
- Department of Physics , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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