1
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Li Z, Goldoni L, Wu Y, Imran M, Ivanov YP, Divitini G, Zito J, Panneerselvam IR, Baranov D, Infante I, De Trizio L, Manna L. Exogenous Metal Cations in the Synthesis of CsPbBr 3 Nanocrystals and Their Interplay with Tertiary Amines. J Am Chem Soc 2024. [PMID: 39018374 DOI: 10.1021/jacs.4c03084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/19/2024]
Abstract
Current syntheses of CsPbBr3 halide perovskite nanocrystals (NCs) rely on overstoichiometric amounts of Pb2+ precursors, resulting in unreacted lead ions at the end of the process. In our synthesis scheme of CsPbBr3 NCs, we replaced excess Pb2+ with different exogenous metal cations (M) and investigated their effect on the synthesis products. These cations can be divided into two groups: group 1 delivers monodisperse CsPbBr3 cubes capped with oleate species (as for the case when Pb2+ is used in excess) and with a photoluminescence quantum yield (PLQY) as high as 90% with some cations (for example with M = In3+); group 2 yields irregularly shaped CsPbBr3 NCs with broad size distributions. In both cases, the addition of a tertiary ammonium cation (didodecylmethylammonium, DDMA+) during the synthesis, after the nucleation of the NCs, reshapes the NCs to monodisperse truncated cubes. Such NCs feature a mixed oleate/DDMA+ surface termination with PLQY values of up to 97%. For group 1 cations this happens only if the ammonium cation is directly added as a salt (DDMA-Br), while for group 2 cations this happens even if the corresponding tertiary amine (DDMA) is added, instead of DDMA-Br. This is attributed to the fact that only group 2 cations can facilitate the protonation of DDMA by the excess oleic acid present in the reaction environment. In all cases studied, the incorporation of M cations is marginal, and the reshaping of the NCs is only transient: if the reactions are run for a long time, the truncated cubes evolve to cubes.
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Affiliation(s)
- Zhanzhao Li
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Luca Goldoni
- Chemistry Facility, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Ye Wu
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Muhammad Imran
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Yurii P Ivanov
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Giorgio Divitini
- Electron Spectroscopy and Nanoscopy, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Juliette Zito
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | | | - Dmitry Baranov
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
- Division of Chemical Physics, Department of Chemistry, Lund University, P.O. Box 124, Lund SE-221 00, Sweden
| | - Ivan Infante
- BCMaterials, Basque Center for Materials, Applications, and Nanostructures, UPV/EHU Science Park, Leioa 48940, Spain
- Ikerbasque Basque Foundation for Science, Bilbao 48009, Spain
| | - Luca De Trizio
- Chemistry Facility, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy
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2
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Gidey A, Haruta Y, Herman AP, Grodzicki M, Melnychenko AM, Majchrzak D, Mahato S, Rogowicz E, Syperek M, Kudrawiec R, Saidaminov MI, Abdelhady AL. Surface Engineering of Methylammonium Lead Bromide Perovskite Crystals for Enhanced X-ray Detection. J Phys Chem Lett 2023; 14:9136-9144. [PMID: 37795957 PMCID: PMC10577767 DOI: 10.1021/acs.jpclett.3c02061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 09/28/2023] [Indexed: 10/06/2023]
Abstract
The surface quality of lead halide perovskite crystals can extremely influence their optoelectronic properties and device performance. Here, we report a surface engineering crystallization technique in which we in situ grow a polycrystalline methylammonium lead tribromide (MAPbBr3) film on top of bulk mm-sized single crystals. Such MAPbBr3 crystals with a MAPbBr3 passivating film display intense green emission under UV light. X-ray photoelectron spectroscopy demonstrates that these crystals with emissive surfaces are compositionally different from typical MAPbBr3 crystals that show no emission under UV light. Time-resolved photoluminescence and electrical measurements indicate that the MAPbBr3 film/MAPbBr3 crystals possess less surface defects compared to the bare MAPbBr3 crystals. Therefore, X-ray detectors fabricated using the surface-engineered MAPbBr3 crystals provide an almost 5 times improved sensitivity to X-rays and a more stable baseline drift with respect to the typical MAPbBr3 crystals.
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Affiliation(s)
- Abraha
Tadese Gidey
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
| | - Yuki Haruta
- Department
of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Artur P. Herman
- Department
of Semiconductor Materials Engineering, Faculty of Fundamental Problems
of Technology, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Miłosz Grodzicki
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
- Department
of Semiconductor Materials Engineering, Faculty of Fundamental Problems
of Technology, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Anna M. Melnychenko
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
- Department
of Semiconductor Materials Engineering, Faculty of Fundamental Problems
of Technology, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Dominika Majchrzak
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
| | - Somnath Mahato
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
| | - Ernest Rogowicz
- Department
of Experimental Physics, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Marcin Syperek
- Department
of Experimental Physics, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Robert Kudrawiec
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
- Department
of Semiconductor Materials Engineering, Faculty of Fundamental Problems
of Technology, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Makhsud I. Saidaminov
- Department
of Chemistry, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
- Department
of Electrical & Computer Engineering, University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
- Centre for
Advanced Materials and Related Technologies (CAMTEC), University of Victoria, 3800 Finnerty Road, Victoria, British Columbia V8P 5C2, Canada
| | - Ahmed L. Abdelhady
- ŁUKASIEWICZ
Research Network PORT-Polish Center for Technology Development, 54-066 Wrocław, Poland
- Department
of Chemistry, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
- Advanced
Materials Chemistry Center (AMCC), Khalifa
University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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3
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Ramya K, Mondal A, Gupta DS, Mukhopadhyay DS. Asymmetrical Electrical Performance across Different Planes of Solution-Grown MAPbBr 3 Crystals of mm Dimensions. ACS OMEGA 2022; 7:42138-42145. [PMID: 36440177 PMCID: PMC9685599 DOI: 10.1021/acsomega.2c04681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Throughout a few years, carrier transport studies across HaP single crystals have gained enormous importance for current generation photovoltaic and photodetector research with their superior optoelectronic properties compared to commercially available polycrystalline materials. Utilizing the room-temperature solution-grown method, we synthesized MAPbBr3 crystals and examined their electrical transport properties. Although the X-ray diffraction reveals the cubical nature of the crystals, we have observed anisotropy in the electrical transport behavior and variation in dielectric constant across the three opposite faces of the crystals of mm dimensions. The face with a higher dielectric constant depicts improved parameters from electrical characteristics such as lower trap densities and higher mobility values. We further explore the origin of its anisotropic nature by performing X-ray diffraction on three opposite faces of crystals. Our studies define the specific faces of cuboid-shaped MAPbBr3 crystals for efficient electrical contact in the fabrication of optoelectronic devices.
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Affiliation(s)
- Kunchanapalli Ramya
- Department
of Physics, SRM University—Andhra
Pradesh, Andhra Pradesh522240, India
| | - Arindam Mondal
- Department
of Chemistry, Indian Institute of Technology, Bhilai492015, India
| | - Dr. Satyajit Gupta
- Department
of Chemistry, Indian Institute of Technology, Bhilai492015, India
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4
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Ceratti DR, Tenne R, Bartezzaghi A, Cremonesi L, Segev L, Kalchenko V, Oron D, Potenza MAC, Hodes G, Cahen D. Self-Healing and Light-Soaking in MAPbI 3 : The Effect of H 2 O. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110239. [PMID: 35731235 DOI: 10.1002/adma.202110239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 05/23/2022] [Indexed: 06/15/2023]
Abstract
The future of halide perovskites (HaPs) is beclouded by limited understanding of their long-term stability. While HaPs can be altered by radiation that induces multiple processes, they can also return to their original state by "self-healing." Here two-photon (2P) absorption is used to effect light-induced modifications within MAPbI3 single crystals. Then the changes in the photodamaged region are followed by measuring the photoluminescence, from 2P absorption with 2.5 orders of magnitude lower intensity than that used for photodamaging the MAPbI3 . After photodamage, two brightening and one darkening process are found, all of which recover but on different timescales. The first two are attributed to trap-filling (the fastest) and to proton-amine-related chemistry (the slowest), while photodamage is attributed to the lead-iodide sublattice. Surprisingly, while after 2P-irradiation of crystals that are stored in dry, inert ambient, photobrightening (or "light-soaking") occurs, mostly photodarkening is seen after photodamage in humid ambient, showing an important connection between the self-healing of a HaP and the presence of H2 O, for long-term steady-state illumination, practically no difference remains between samples kept in dry or humid environments. This result suggests that photobrightening requires a chemical-reservoir that is sensitive to the presence of H2 O, or possibly other proton-related, particularly amine, chemistry.
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Affiliation(s)
- Davide Raffaele Ceratti
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 7610001, Israel
- CNRS, UMR 9006, IPVF, Institut Photovoltaïque d'Ile-de-France, 18 Boulevard Thomas Gobert, Palaiseau, 91120, France
| | - Ron Tenne
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Andrea Bartezzaghi
- Institute of Mathematics, École Polytechnique Fédérale de Lausanne, Station 8, Lausanne, CH-1015, Switzerland
| | - Llorenç Cremonesi
- Department of Physics and CIMAINA, University of Milan, via Celoria, 16, Milan, 20133, Italy
| | - Lior Segev
- Department of Physics Core Facilities Lab Automation Software Unit, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Vyacheslav Kalchenko
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Dan Oron
- Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | | | - Gary Hodes
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - David Cahen
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 7610001, Israel
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5
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Liu S, Zhang D, Sheng Y, Zhang W, Qin Z, Qin M, Li S, Wang Y, Gao C, Wang Q, Ming Y, Liu C, Yang K, Huang Q, Qi J, Gao Q, Chen K, Hu Y, Rong Y, Lu X, Mei A, Han H. Highly oriented MAPbI 3 crystals for efficient hole-conductor-free printable mesoscopic perovskite solar cells. FUNDAMENTAL RESEARCH 2022; 2:276-283. [PMID: 38933159 PMCID: PMC11197800 DOI: 10.1016/j.fmre.2021.09.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/31/2021] [Accepted: 09/06/2021] [Indexed: 12/20/2022] Open
Abstract
Highly crystalline perovskite films with large grains and few grain boundaries are conducive for efficient and stable perovskite solar cells. Current methods for preparing perovskite films are mostly based on a fast crystallization process, with rapid nucleation and insufficient growth. In this study, MAPbI3 perovskite with inhibited nucleation and promoted growth in the TiO2/ZrO2/carbon triple mesoscopic scaffold was crystallized by modulating the precursor and the crystallization process. N-methylformamide showed high solubility for both methylammonium iodide and PbI2 and hampered the formation of large colloids in the MAPbI3 precursor solution. Furthermore, methylammonium chloride was added to reduce large colloids, which are a possible source of nucleation sites. During the crystallization of MAPbI3, the solvent was removed at a slow controlled speed, to avoid rapid nucleation and provide sufficient time for crystal growth. As a result, highly oriented MAPbI3 crystals with suppressed non-radiative recombination and promoted charge transport were obtained in the triple mesoscopic layer with disordered pores. The corresponding hole-conductor-free, printable mesoscopic perovskite solar cells exhibited a highest power conversion efficiency of 18.82%. The device also exhibited promising long-term operational stability of 1000 h under continuous illumination at maximum power point at 55 ± 5 °C and damp-heat stability of 1340 h aging at 85 °C as well as 85% relative humidity.
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Affiliation(s)
- Shuang Liu
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Deyi Zhang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yusong Sheng
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Weihua Zhang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Zhaotong Qin
- Department of Physics, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China
| | - Minchao Qin
- Department of Physics, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China
| | - Sheng Li
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yifan Wang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Chenxu Gao
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qifei Wang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yue Ming
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Chao Liu
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Kai Yang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qingyi Huang
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Jianhang Qi
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qiaojiao Gao
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Kai Chen
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yue Hu
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Yaoguang Rong
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Xinhui Lu
- Department of Physics, The Chinese University of Hong Kong, New Territories, Hong Kong SAR, China
| | - Anyi Mei
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Hongwei Han
- Michael Grätzel Center for Mesoscopic Solar Cells, Wuhan National Laboratory for Optoelectronics, Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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6
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Ray A, Martín-García B, Moliterni A, Casati N, Boopathi KM, Spirito D, Goldoni L, Prato M, Giacobbe C, Giannini C, Di Stasio F, Krahne R, Manna L, Abdelhady AL. Mixed Dimethylammonium/Methylammonium Lead Halide Perovskite Crystals for Improved Structural Stability and Enhanced Photodetection. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106160. [PMID: 34856033 DOI: 10.1002/adma.202106160] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 11/24/2021] [Indexed: 06/13/2023]
Abstract
The solvent acidolysis crystallization technique is utilized to grow mixed dimethylammonium/methylammonium lead tribromide (DMA/MAPbBr3 ) crystals reaching the highest dimethylammonium incorporation of 44% while maintaining the 3D cubic perovskite phase. These mixed perovskite crystals show suppression of the orthorhombic phase and a lower tetragonal-to-cubic phase-transition temperature compared to MAPbBr3 . A distinct behavior is observed in the temperature-dependent photoluminescence properties of MAPbBr3 and mixed DMA/MAPbBr3 crystals due to the different organic cation dynamics governing the phase transition(s). Furthermore, lateral photodetectors based on these crystals show that, at room temperature, the mixed crystals possess higher detectivity compared to MAPbBr3 crystals caused by structural compression and reduced surface trap density. Remarkably, the mixed-crystal devices exhibit large enhancement in their detectivity below the phase-transition temperature (at 200 K), while for the MAPbBr3 devices only insignificant changes are observed. The high detectivity of the mixed crystals makes them attractive for visible-light communication and for space applications. The results highlight the importance of the synthetic technique for compositional engineering of halide perovskites that governs their structural and optoelectronic properties.
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Affiliation(s)
- Aniruddha Ray
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, Genoa, 16146, Italy
| | - Beatriz Martín-García
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
- CIC nanoGUNE, Tolosa Hiribidea, 76, Donostia-San Sebastian, 20018, Spain
| | - Anna Moliterni
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/O, Bari, 70126, Italy
| | - Nicola Casati
- Laboratory for Synchrotron Radiation-Condensed Matter, Paul Scherrer Institut, Villigen, 5232, Switzerland
| | | | - Davide Spirito
- IHP-Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, Frankfurt (Oder), D-15236, Germany
| | - Luca Goldoni
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Mirko Prato
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Carlotta Giacobbe
- European Synchrotron Radiation Facility, 71 Avenue Des Martyrs, Grenoble, 38040, France
| | - Cinzia Giannini
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/O, Bari, 70126, Italy
| | | | - Roman Krahne
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Liberato Manna
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Ahmed L Abdelhady
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
- ŁUKASIEWICZ Research Network PORT-Polish Center for Technology Development, ul. Stabłowicka 147, Wrocław, 54066, Poland
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7
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Zhang C, Liu X, Chen J, Lin J. Solution and
Solid‐Phase
Growth of Bulk Halide Perovskite Single Crystals. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Chao Zhang
- Department of Physics, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power Shanghai 200090 China
| | - Xiaolin Liu
- Department of Physics, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power Shanghai 200090 China
| | - Jing Chen
- Department of Physics, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power Shanghai 200090 China
| | - Jia Lin
- Department of Physics, Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power Shanghai 200090 China
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8
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Dhanabalan B, Biffi G, Moliterni A, Olieric V, Giannini C, Saleh G, Ponet L, Prato M, Imran M, Manna L, Krahne R, Artyukhin S, Arciniegas MP. Engineering the Optical Emission and Robustness of Metal-Halide Layered Perovskites through Ligand Accommodation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008004. [PMID: 33644923 DOI: 10.1002/adma.202008004] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/11/2021] [Indexed: 05/24/2023]
Abstract
The unique combination of organic and inorganic layers in 2D layered perovskites offers promise for the design of a variety of materials for mechatronics, flexoelectrics, energy conversion, and lighting. However, the potential tailoring of their properties through the organic building blocks is not yet well understood. Here, different classes of organoammonium molecules are exploited to engineer the optical emission and robustness of a new set of Ruddlesden-Popper metal-halide layered perovskites. It is shown that the type of molecule regulates the number of hydrogen bonds that it forms with the edge-sharing [PbBr6 ]4- octahedra layers, leading to strong differences in the material emission and tunability of the color coordinates, from deep-blue to pure-white. Also, the emission intensity strongly depends on the length of the molecules, thereby providing an additional parameter to optimize their emission efficiency. The combined experimental and computational study provides a detailed understanding of the impact of lattice distortions, compositional defects, and the anisotropic crystal structure on the emission of such layered materials. It is foreseen that this rational design can be extended to other types of organic linkers, providing a yet unexplored path to tailor the optical and mechanical properties of these materials and to unlock new functionalities.
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Affiliation(s)
- Balaji Dhanabalan
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso, 31, Genova, 16146, Italy
| | - Giulia Biffi
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso, 31, Genova, 16146, Italy
| | - Anna Moliterni
- Istituto di Cristallografia, CNR, Via Amendola, 122/O, Bari, 70126, Italy
| | - Vincent Olieric
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, 5232, Switzerland
| | - Cinzia Giannini
- Istituto di Cristallografia, CNR, Via Amendola, 122/O, Bari, 70126, Italy
| | - Gabriele Saleh
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Louis Ponet
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Mirko Prato
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Muhammad Imran
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Liberato Manna
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Roman Krahne
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
| | - Sergey Artyukhin
- Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
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9
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Solari SF, Kumar S, Jagielski J, Kubo NM, Krumeich F, Shih CJ. Ligand-assisted solid phase synthesis of mixed-halide perovskite nanocrystals for color-pure and efficient electroluminescence. JOURNAL OF MATERIALS CHEMISTRY. C 2021; 9:5771-5778. [PMID: 33996098 PMCID: PMC8101407 DOI: 10.1039/d0tc04667a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
Colloidal nanocrystals (NCs) of lead halide perovskites have generated considerable interest in the fabrication of optoelectronic devices, such as light emitting-diodes (LEDs), because of their tunable optical bandgap, narrow spectral width, and high defect tolerance. However, the inhomogeneous halide distribution within individual NCs remains a critical challenge in order to obtain color-stable electroluminescence in mixed-halide systems. Here, we demonstrate a new post-synthetic approach, ligand-assisted solid phase synthesis (LASPS), for the preparation of electroluminescent colloidal NCs of methylammonium (MA) lead halide perovskites, at room temperature. The slow reaction kinetics preserves the morphology, size, and shape in the resulting NCs whose emission covers the entire visible spectral region with photoluminescence (PL) quantum yields (QYs) of up to >90% and colloidal stability up to several months. The LEDs fabricated using the prepared mixed-halide NCs display narrowband electroluminescence (EL) ranging from 476 to 720 nm. The optimized red LEDs exhibit an external quantum efficiency, η ext, of up to 2.65%, with the CIE 1931 color coordinates of (0.705, 0.290), nearly identical to those of the red primary in the recommendation (rec.) 2020 standard (0.708, 0.292).
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Affiliation(s)
- Simon F Solari
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland
| | - Sudhir Kumar
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland
| | - Jakub Jagielski
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland
| | - Nikolas M Kubo
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland
| | - Frank Krumeich
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland
| | - Chih-Jen Shih
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich Vladimir Prelog Weg 1 CH-8093 Zürich Switzerland
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10
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Roy M, Dedhia U, Alam A, Aslam M. Spontaneous Ion Migration via Mechanochemical Ultrasonication in Mixed Halide Perovskite Phase Formation: Experimental and Theoretical Insights. J Phys Chem Lett 2021; 12:1189-1194. [PMID: 33480705 DOI: 10.1021/acs.jpclett.0c03426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We present a simple yet powerful synthesis process to prepare compound-phase perovskite nanoparticles (MAPbX3-nYn; MA = CH3NH3+ and X/Y = I, Br, or Cl). This is achieved by mixing two pure-phase perovskites (MAPbX3 and MAPbY3) by using ultrasonic vibration as a mechanochemical excitation. Unlike conventional methods, this procedure does not require any effort in designing a reaction or choosing any particular precursor. X-ray diffraction and TEM studies confirm compound-phase formation in all possible stoichiometries. The origin behind ultrasonic mixing lies in the generation of mechanical stress and high temperature arising from acoustic cavitation during reaction. Long-term experimental stability of the compound-phase is comprehended theoretically by simulating the temperature-dependent Gibbs free energy. Negative mixing entropy plays a crucial role during the synthesis which leads to better stabilization of the compound-phase perovskite over the pure-phase. The ease of synthesis and remarkable phase stability make this process effective and less cumbersome for perovskite nanoparticle synthesis.
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Affiliation(s)
- Mrinmoy Roy
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Urvi Dedhia
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - Aftab Alam
- Materials Modelling Group, Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
| | - M Aslam
- Department of Physics, Indian Institute of Technology Bombay, Mumbai, India 400076
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11
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12
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Lian H, Li Y, Sharafudeen K, Zhao W, Krishnan GR, Zhang S, Qiu J, Huang K, Han G. Highly Thermotolerant Metal Halide Perovskite Solids. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2002495. [PMID: 32462669 DOI: 10.1002/adma.202002495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 04/30/2020] [Indexed: 06/11/2023]
Abstract
By virtue of their narrow emission bands, near-unity quantum yield, and low fabrication cost, metal halide perovskites hold great promise in numerous aspects of optoelectronic applications, including solid-state lighting, lasing, and displays. Despite such promise, the poor temperature tolerance and suboptimal quantum yield of the existing metal halide perovskites in their solid state have severely limited their practical applications. Here, a straightforward heterogeneous interfacial method to develop superior thermotolerant and highly emissive solid-state metal halide perovskites is reported and their use as long-lasting high-temperature and high-input-power durable solid-state light-emitting diodes is illustrated. It is found that the resultant materials can well maintain their superior quantum efficiency after heating at a temperature over 150 °C for up to 22 h. A white light-emitting diode (w-LED) constructed from the metal halide perovskite solid exhibits superior temperature sustainable lifetime over 1100 h. The w-LED also displays a highly durable high-power-driving capability, and its working current can go up to 300 mA. It is believed that such highly thermotolerant metal halide perovskites will unleash the possibility of a wide variety of high-power and high-temperature solid-state lighting, lasing, and display devices that have been limited by existing methods.
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Affiliation(s)
- Huiwang Lian
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yang Li
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | | | - Weiren Zhao
- School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Gopi R Krishnan
- Department of Physics, NSS College Pandalam, Pathanamthitta, Kerala, 689501, India
| | - Shaoan Zhang
- School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou, 510665, China
| | - Jianrong Qiu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Kai Huang
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, USA
| | - Gang Han
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, USA
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13
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Dhanabalan B, Castelli A, Palei M, Spirito D, Manna L, Krahne R, Arciniegas M. Simple fabrication of layered halide perovskite platelets and enhanced photoluminescence from mechanically exfoliated flakes. NANOSCALE 2019; 11:8334-8342. [PMID: 30984951 DOI: 10.1039/c9nr00638a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
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 extensions and strong confinement in one dimension that is highly appealing for studying fundamental photophysics. Here, we report a facile route for the growth of single-layered perovskite platelets, which is demonstrated using four different organic cations acting as spacers, providing a layer interdistance from approx. 1.3 nm to 2.4 nm. The resulting ensembles of platelets exhibit a strong emission band in the deep blue spectral region characterized by two emission peaks and a photoluminescence quantum yield (PLQY) up to 15%. Thin 2D layered perovskite flakes can be readily obtained by mechanical exfoliation, and their emission shows a PLQY as high as 42%, which can be related to reduced reabsorption in the exfoliated crystals. Furthermore, the low energy peak that was observed in the double peak emission from the platelet ensembles is suppressed in the exfoliated flakes. Therefore, the exfoliated flakes manifest a more colour-pure blue emission with strongly increased radiative rate as compared to the dried platelet aggregates obtained directly from the synthesis. The straightforward fabrication strategy that employs solely polar solvents with low environmental impact provides a highly appealing route towards two-dimensional perovskite systems with bright and stable emission in the blue spectral range.
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Affiliation(s)
- Balaji Dhanabalan
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy.
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14
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Heuer-Jungemann A, Feliu N, Bakaimi I, Hamaly M, Alkilany A, Chakraborty I, Masood A, Casula MF, Kostopoulou A, Oh E, Susumu K, Stewart MH, Medintz IL, Stratakis E, Parak WJ, Kanaras AG. The Role of Ligands in the Chemical Synthesis and Applications of Inorganic Nanoparticles. Chem Rev 2019; 119:4819-4880. [PMID: 30920815 DOI: 10.1021/acs.chemrev.8b00733] [Citation(s) in RCA: 465] [Impact Index Per Article: 93.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The design of nanoparticles is critical for their efficient use in many applications ranging from biomedicine to sensing and energy. While shape and size are responsible for the properties of the inorganic nanoparticle core, the choice of ligands is of utmost importance for the colloidal stability and function of the nanoparticles. Moreover, the selection of ligands employed in nanoparticle synthesis can determine their final size and shape. Ligands added after nanoparticle synthesis infer both new properties as well as provide enhanced colloidal stability. In this article, we provide a comprehensive review on the role of the ligands with respect to the nanoparticle morphology, stability, and function. We analyze the interaction of nanoparticle surface and ligands with different chemical groups, the types of bonding, the final dispersibility of ligand-coated nanoparticles in complex media, their reactivity, and their performance in biomedicine, photodetectors, photovoltaic devices, light-emitting devices, sensors, memory devices, thermoelectric applications, and catalysis.
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Affiliation(s)
- Amelie Heuer-Jungemann
- School of Physics and Astronomy, Faculty of Engineering and Physical Sciences , University of Southampton , Southampton SO17 1BJ , U.K
| | - Neus Feliu
- Department of Laboratory Medicine (LABMED) , Karolinska Institutet , Stockholm 171 77 , Sweden.,Fachbereich Physik, CHyN , Universität Hamburg , 22607 Hamburg , Germany
| | - Ioanna Bakaimi
- School of Chemistry, Faculty of Engineering and Physical Sciences , University of Southampton , Southampton SO171BJ , U.K
| | - Majd Hamaly
- King Hussein Cancer Center , P. O. Box 1269, Al-Jubeiha, Amman 11941 , Jordan
| | - Alaaldin Alkilany
- Department of Pharmaceutics & Pharmaceutical Technology, School of Pharmacy , The University of Jordan , Amman 11942 , Jordan.,Fachbereich Physik, CHyN , Universität Hamburg , 22607 Hamburg , Germany
| | | | - Atif Masood
- Fachbereich Physik , Philipps Universität Marburg , 30357 Marburg , Germany
| | - Maria F Casula
- INSTM and Department of Chemical and Geological Sciences , University of Cagliari , 09042 Monserrato , Cagliari , Italy.,Department of Mechanical, Chemical and Materials Engineering , University of Cagliari , Via Marengo 2 , 09123 Cagliari , Italy
| | - Athanasia Kostopoulou
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , Heraklion , 71110 Crete , Greece
| | - Eunkeu Oh
- KeyW Corporation , Hanover , Maryland 21076 , United States.,Optical Sciences Division, Code 5600 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Kimihiro Susumu
- KeyW Corporation , Hanover , Maryland 21076 , United States.,Optical Sciences Division, Code 5600 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Michael H Stewart
- Optical Sciences Division, Code 5600 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Igor L Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900 , U.S. Naval Research Laboratory , Washington , D.C. 20375 , United States
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser , Foundation for Research and Technology-Hellas , Heraklion , 71110 Crete , Greece
| | - Wolfgang J Parak
- Fachbereich Physik, CHyN , Universität Hamburg , 22607 Hamburg , Germany
| | - Antonios G Kanaras
- School of Physics and Astronomy, Faculty of Engineering and Physical Sciences , University of Southampton , Southampton SO17 1BJ , U.K
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15
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Shamsi J, Urban AS, Imran M, De Trizio L, Manna L. Metal Halide Perovskite Nanocrystals: Synthesis, Post-Synthesis Modifications, and Their Optical Properties. Chem Rev 2019; 119:3296-3348. [PMID: 30758194 PMCID: PMC6418875 DOI: 10.1021/acs.chemrev.8b00644] [Citation(s) in RCA: 579] [Impact Index Per Article: 115.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Indexed: 01/17/2023]
Abstract
Metal halide perovskites represent a flourishing area of research, which is driven by both their potential application in photovoltaics and optoelectronics and by the fundamental science behind their unique optoelectronic properties. The emergence of new colloidal methods for the synthesis of halide perovskite nanocrystals, as well as the interesting characteristics of this new type of material, has attracted the attention of many researchers. This review aims to provide an up-to-date survey of this fast-moving field and will mainly focus on the different colloidal synthesis approaches that have been developed. We will examine the chemistry and the capability of different colloidal synthetic routes with regard to controlling the shape, size, and optical properties of the resulting nanocrystals. We will also provide an up-to-date overview of their postsynthesis transformations, and summarize the various solution processes that are aimed at fabricating halide perovskite-based nanocomposites. Furthermore, we will review the fundamental optical properties of halide perovskite nanocrystals by focusing on their linear optical properties, on the effects of quantum confinement, and on the current knowledge of their exciton binding energies. We will also discuss the emergence of nonlinear phenomena such as multiphoton absorption, biexcitons, and carrier multiplication. Finally, we will discuss open questions and possible future directions.
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Affiliation(s)
- Javad Shamsi
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Alexander S. Urban
- Nanospectroscopy
Group, Department of Physics and Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität (LMU), Amalienstaße 54, 80799 Munich, Germany
| | - Muhammad Imran
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Luca De Trizio
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Kavli
Institute of Nanoscience and Department of Chemical Engineering, Delft University of Technology, PO Box 5, 2600AA Delft, The Netherlands
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16
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Hassan Y, Ashton OJ, Park JH, Li G, Sakai N, Wenger B, Haghighirad AA, Noel NK, Song MH, Lee BR, Friend RH, Snaith HJ. Facile Synthesis of Stable and Highly Luminescent Methylammonium Lead Halide Nanocrystals for Efficient Light Emitting Devices. J Am Chem Soc 2019; 141:1269-1279. [PMID: 30605603 DOI: 10.1021/jacs.8b09706] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Metal halide perovskites are promising candidates for use in light emitting diodes (LEDs), due to their potential for color tunable and high luminescence efficiency. While recent advances in perovskite-based light emitting diodes have resulted in external quantum efficiencies exceeding 12.4% for the green emitters, and infrared emitters based on 3 D/2D mixed dimensional perovskites have exceeded 20%, the external quantum efficiencies of the red and blue emitters still lag behind. A critical issue to date is creating highly emissive and stable perovskite emitters with the desirable emission band gap to achieve full-color displays and white LEDs. Herein, we report the preparation and characterization of a highly luminescent and stable suspension of cubic-shaped methylammonium lead triiodide (CH3NH3PbI3) perovskite nanocrystals, where we synthesize the nanocrystals via a ligand-assisted reprecipitation technique, using an acetonitrile/methylamine compound solvent system to solvate the ions and toluene as the antisolvent to induce crystallization. Through tuning the ratio of the ligands, the ligand to toluene ratio, and the temperature of the toluene, we obtain a solution of CH3NH3PbI3 nanocrystals with a photoluminescence quantum yield exceeding 93% and tunable emission between 660 and 705 nm. We also achieved red emission at 635 nm by blending the nanocrystals with bromide salt and obtained perovskite-based light emitting diodes with maximum electroluminescent external quantum efficiency of 2.75%.
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Affiliation(s)
- Yasser Hassan
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom
| | - Olivia J Ashton
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom
| | - Jong Hyun Park
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials/Low Dimensional Carbon Center/Perovtronics Research Center , Ulsan National Institute of Science and Technology (UNIST) , UNIST-gil 50 , Ulsan 44919 , Republic of Korea
| | - Guangru Li
- Cavendish Laboratory , University of Cambridge , J J Thomson Avenue , Cambridge CB3 0HE , United Kingdom
| | - Nobuya Sakai
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom
| | - Bernard Wenger
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom
| | - Amir-Abbas Haghighirad
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom.,Institute for Solid State Physics , Karlsruhe Institute of Technology , 76021 Karlsruhe , Germany
| | - Nakita K Noel
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom
| | - Myoung Hoon Song
- School of Materials Science Engineering and KIST-UNIST Ulsan Center for Convergent Materials/Low Dimensional Carbon Center/Perovtronics Research Center , Ulsan National Institute of Science and Technology (UNIST) , UNIST-gil 50 , Ulsan 44919 , Republic of Korea
| | - Bo Ram Lee
- Cavendish Laboratory , University of Cambridge , J J Thomson Avenue , Cambridge CB3 0HE , United Kingdom.,Department of Physics , Pukyong National University , 45 Yongso-ro , Nam-Gu , Busan 48513 , Republic of Korea
| | - Richard H Friend
- Cavendish Laboratory , University of Cambridge , J J Thomson Avenue , Cambridge CB3 0HE , United Kingdom
| | - Henry J Snaith
- Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom
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17
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Mangstl M, Wied JK, Weber J, Pritzel C, Trettin R, Schmedt auf der Günne J. Synthesis and characterization of methylammonium phosphates as crystalline approximants for anhydrous, low melting phosphate glasses. RSC Adv 2019; 9:1822-1830. [PMID: 35516152 PMCID: PMC9059716 DOI: 10.1039/c8ra07736c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 12/27/2018] [Indexed: 01/26/2023] Open
Abstract
Low-melting methylammonium phosphate glasses are synthesized from crystalline starting agents. To this end crystalline tris(methylammonium) cyclotriphosphate [CH3NH3]3P3O9, was synthesized by a novel and simple synthesis route from P4O10 and N-methylformamide. It, undergoes an irreversible phase transition to methylammonium catena-polyphosphate [CH3NH3]PO3. The crystal structure of the catena-polyphosphate was solved and refined from X-ray powder diffraction data by the Rietveld method using constraints obtained by solid-state 31P and 1H NMR spectroscopy. This compound crystallizes in a triclinic space group with a = 13.2236(9), b = 7.8924(6), c = 4.6553(2) Å, α = 91.068(4), β = 87.840(5) and γ = 106.550(3)°. Quantum chemical calculations confirm that the obtained structure lies at an energetic minimum. Finally the reaction of tris(methylammonium) cyclotriphosphate and P4O10 into methylammonium phosphate glass is presented. The synthesized, water-free phosphate glass shows a very low glass transition temperature Tg of 33 °C, which was verified by dynamic scanning calorimetry and NMR. The chain-like crystal structure of the high-temperature methylammoniumphosphate [CH3NH3]PO3 serves as an approximation for the short-range order of the glass. The novel glass shows the lowest glass transition temperature known for binary phosphate glass systems without acidic protons.![]()
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Affiliation(s)
- Martin Mangstl
- Inorganic Materials Chemistry
- Universität Siegen
- 57076 Siegen
- Germany
| | - Jan Konrad Wied
- Inorganic Materials Chemistry
- Universität Siegen
- 57076 Siegen
- Germany
| | - Johannes Weber
- Inorganic Materials Chemistry
- Universität Siegen
- 57076 Siegen
- Germany
| | - Christian Pritzel
- Institute for Building and Materials Chemistry
- Universität Siegen
- 57076 Siegen
- Germany
| | - Reinhard Trettin
- Institute for Building and Materials Chemistry
- Universität Siegen
- 57076 Siegen
- Germany
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18
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Castelli A, Biffi G, Ceseracciu L, Spirito D, Prato M, Altamura D, Giannini C, Artyukhin S, Krahne R, Manna L, Arciniegas MP. Revealing Photoluminescence Modulation from Layered Halide Perovskite Microcrystals upon Cyclic Compression. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805608. [PMID: 30393907 DOI: 10.1002/adma.201805608] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/26/2018] [Indexed: 05/24/2023]
Abstract
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 controlled using much lower pressures by exploiting the optical anisotropy of the embedded organic molecules in the structure. This work introduces layered perovskite microplatelets and demonstrates the extreme sensitivity of their emission to cyclic mechanical loading in the range of tens of MPa. A drastic change in their emission is observed in situ, from near-white to an enhanced blue color. This process is reversible, as is evident from a hysteresis loop in the photoluminescence (PL) intensity of the microplatelets. A combination of experimental analysis and computational modelling shows that such behavior cannot be attributed to changes in the crystallographic structure of the flakes. Instead, it suggests that, thanks to their structural anisotropy, microplate alignment and reorientation are responsible for the observed PL modulation. The possibility to tune the optical emission of layered perovskite crystals via low pressures makes them highly interesting as active materials in applications where stress sensing or light modulation is desired.
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Affiliation(s)
- Andrea Castelli
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Giulia Biffi
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso, 31, 16146, Genova, Italy
| | - Luca Ceseracciu
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Davide Spirito
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Mirko Prato
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Davide Altamura
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, via Amendola 122/O, 70126, Bari, Italy
| | - Cinzia Giannini
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, via Amendola 122/O, 70126, Bari, Italy
| | - Sergey Artyukhin
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Roman Krahne
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Liberato Manna
- Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
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19
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Li F, Lin F, Huang Y, Cai Z, Qiu L, Zhu Y, Jiang Y, Wang Y, Chen X. Bromobenzene aliphatic nucleophilic substitution guided controllable and reproducible synthesis of high quality cesium lead bromide perovskite nanocrystals. Inorg Chem Front 2019. [DOI: 10.1039/c9qi01095e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We develop a new chemical design for the controllable and reproducible synthesis of high quality CsPbBr3 perovskite nanocrystals in one step based on bromobenzene and alkane amine aliphatic nucleophilic substitution.
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Affiliation(s)
- Feiming Li
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Fangyuan Lin
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Yipeng Huang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Zhixiong Cai
- College of Chemistry
- Chemical Engineering and Environment
- Minnan Normal University
- Zhangzhou
- P.R. China
| | - Linhang Qiu
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Yimeng Zhu
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Yaqi Jiang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Yiru Wang
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
| | - Xi Chen
- The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- P.R. China
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20
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Zhang L, Dai X, Li T, Li J, Li H. CH 3NH 3PbX 3 (X = I, Br) encapsulated in silicon carbide/carbon nanotube as advanced diodes. Sci Rep 2018; 8:15187. [PMID: 30315191 PMCID: PMC6185940 DOI: 10.1038/s41598-018-33668-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 10/03/2018] [Indexed: 12/03/2022] Open
Abstract
We employ first-principles density functional theory (DFT) calculations to study CH3NH3PbX3 (X = I, Br) and its encapsulation into the silicon carbide nanotube and carbon nanotube (CNT). Our results indicate that these devices show diode behaviors which act on negative bias voltage but do not work under positive voltage. When they are encapsulated into SiC nanotube and CNT, their electronic properties would be changed, especially, electric currents mainly exist at positive bias region. Corresponding transmission spectra and density of states are provided to interpret the transport mechanism of the CH3NH3PbX3 (X = I, Br) as a diode. These findings open a new door to microelectronics and integrated circuit components, providing theoretical foundation for innovation of the new generation of electronic materials.
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Affiliation(s)
- Lishu Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, People's Republic of China
| | - Xinyue Dai
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, People's Republic of China
| | - Tao Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, People's Republic of China
| | - Jie Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, People's Republic of China
| | - Hui Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, People's Republic of China.
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21
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Li Z, Kolodziej C, Zhang T, McCleese C, Kovalsky A, Zhao Y, Lambrecht WRL, Burda C. Optoelectronic Dichotomy of Mixed Halide CH3NH3Pb(Br1–xClx)3 Single Crystals: Surface versus Bulk Photoluminescence. J Am Chem Soc 2018; 140:11811-11819. [DOI: 10.1021/jacs.8b07560] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhongguo Li
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Charles Kolodziej
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Taiyang Zhang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Christopher McCleese
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Anton Kovalsky
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Yixin Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Walter R. L. Lambrecht
- Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Clemens Burda
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
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22
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Imran M, Caligiuri V, Wang M, Goldoni L, Prato M, Krahne R, De Trizio L, Manna L. Benzoyl Halides as Alternative Precursors for the Colloidal Synthesis of Lead-Based Halide Perovskite Nanocrystals. J Am Chem Soc 2018; 140:2656-2664. [PMID: 29378131 DOI: 10.1021/jacs.7b13477/suppl_file/ja7b13477_si_001.pdf] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We propose here a new colloidal approach for the synthesis of both all-inorganic and hybrid organic-inorganic lead halide perovskite nanocrystals (NCs). The main limitation of the protocols that are currently in use, such as the hot injection and the ligand-assisted reprecipitation routes, is that they employ PbX2 (X = Cl, Br, or I) salts as both lead and halide precursors. This imposes restrictions on being able to precisely tune the amount of reaction species and, consequently, on being able to regulate the composition of the final NCs. In order to overcome this issue, we show here that benzoyl halides can be efficiently used as halide sources to be injected in a solution of metal cations (mainly in the form of metal carboxylates) for the synthesis of APbX3 NCs (in which A = Cs+, CH3NH3+, or CH(NH2)2+). In this way, it is possible to independently tune the amount of both cations and halide precursors in the synthesis. The APbX3 NCs that were prepared with our protocol show excellent optical properties, such as high photoluminescence quantum yields, low amplified spontaneous emission thresholds, and enhanced stability in air. It is noteworthy that CsPbI3 NCs, which crystallize in the cubic α phase, are stable in air for weeks without any postsynthesis treatment. The improved properties of our CsPbX3 perovskite NCs can be ascribed to the formation of lead halide terminated surfaces, in which Cs cations are replaced by alkylammonium ions.
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Affiliation(s)
- Muhammad Imran
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova , Via Dodecaneso 31, 16146 Genova, Italy
| | | | - Mengjiao Wang
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova , Via Dodecaneso 31, 16146 Genova, Italy
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23
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Imran M, Caligiuri V, Wang M, Goldoni L, Prato M, Krahne R, De Trizio L, Manna L. Benzoyl Halides as Alternative Precursors for the Colloidal Synthesis of Lead-Based Halide Perovskite Nanocrystals. J Am Chem Soc 2018; 140:2656-2664. [PMID: 29378131 PMCID: PMC5908184 DOI: 10.1021/jacs.7b13477] [Citation(s) in RCA: 245] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 12/24/2022]
Abstract
We propose here a new colloidal approach for the synthesis of both all-inorganic and hybrid organic-inorganic lead halide perovskite nanocrystals (NCs). The main limitation of the protocols that are currently in use, such as the hot injection and the ligand-assisted reprecipitation routes, is that they employ PbX2 (X = Cl, Br, or I) salts as both lead and halide precursors. This imposes restrictions on being able to precisely tune the amount of reaction species and, consequently, on being able to regulate the composition of the final NCs. In order to overcome this issue, we show here that benzoyl halides can be efficiently used as halide sources to be injected in a solution of metal cations (mainly in the form of metal carboxylates) for the synthesis of APbX3 NCs (in which A = Cs+, CH3NH3+, or CH(NH2)2+). In this way, it is possible to independently tune the amount of both cations and halide precursors in the synthesis. The APbX3 NCs that were prepared with our protocol show excellent optical properties, such as high photoluminescence quantum yields, low amplified spontaneous emission thresholds, and enhanced stability in air. It is noteworthy that CsPbI3 NCs, which crystallize in the cubic α phase, are stable in air for weeks without any postsynthesis treatment. The improved properties of our CsPbX3 perovskite NCs can be ascribed to the formation of lead halide terminated surfaces, in which Cs cations are replaced by alkylammonium ions.
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Affiliation(s)
- Muhammad Imran
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Vincenzo Caligiuri
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
| | - Mengjiao Wang
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Luca Goldoni
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
| | - Mirko Prato
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
| | - Roman Krahne
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
| | - Luca De Trizio
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry
Department, D3 PharmaChemistry Line Department, Analytical Chemistry Facility and Materials Characterization
Facility, Istituto Italiano di Tecnologia
(IIT), Via Morego 30, 16163 Genova, Italy
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24
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Veldhuis SA, Tay YKE, Bruno A, Dintakurti SSH, Bhaumik S, Muduli SK, Li M, Mathews N, Sum TC, Mhaisalkar SG. Benzyl Alcohol-Treated CH 3NH 3PbBr 3 Nanocrystals Exhibiting High Luminescence, Stability, and Ultralow Amplified Spontaneous Emission Thresholds. NANO LETTERS 2017; 17:7424-7432. [PMID: 29125763 DOI: 10.1021/acs.nanolett.7b03272] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We report the high yield synthesis of about 11 nm sized CH3NH3PbBr3 nanocrystals with near-unity photoluminescence quantum yield. The nanocrystals are formed in the presence of surface-binding ligands through their direct precipitation in a benzyl alcohol/toluene phase. The benzyl alcohol plays a pivotal role in steering the surface ligands binding motifs on the NC surface, resulting in enhanced surface-trap passivation and near-unity PLQY values. We further demonstrate that thin films from purified CH3NH3PbBr3 nanocrystals are stable >4 months in air, exhibit high optical gain (about 520 cm-1), and display stable, ultralow amplified spontaneous emission thresholds of 13.9 ± 1.3 and 569.7 ± 6 μJ cm-2 at one-photon (400 nm) and two-photon (800 nm) absorption, respectively. To the best of our knowledge, the latter signifies a 5-fold reduction of the lowest reported threshold value for halide perovskite nanocrystals to date, which makes them ideal candidates for light-emitting and low-threshold lasing applications.
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Affiliation(s)
- Sjoerd A Veldhuis
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
| | - Yong Kang Eugene Tay
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Annalisa Bruno
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Sai S H Dintakurti
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
| | - Saikat Bhaumik
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
| | - Subas Kumar Muduli
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
| | - Mingjie Li
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Nripan Mathews
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
- School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798
| | - Tze Chien Sum
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371
| | - Subodh G Mhaisalkar
- Energy Research Institute at NTU (ERI@N) , Research Techno Plaza, X-Frontier Block Level 5, 50 Nanyang Drive, Singapore 637553
- School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798
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25
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Yuan L, Patterson R, Wen X, Zhang Z, Conibeer G, Huang S. Investigation of anti-solvent induced optical properties change of cesium lead bromide iodide mixed perovskite (CsPbBr 3-xI x) quantum dots. J Colloid Interface Sci 2017; 504:586-592. [PMID: 28609742 DOI: 10.1016/j.jcis.2017.06.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/31/2017] [Accepted: 06/06/2017] [Indexed: 11/16/2022]
Abstract
Cesium lead halide (CsPbX3, X=Cl, Br, I) perovskites are a new material system that has attracted a lot of research focus. Its tunable band gap and better thermal stability than organic lead halide perovskite give it the potential for applications in optoelectronic devices such as light-emitting diodes and solar cells. Here we have synthesized CsPbBr3-xIx perovskite quantum dots (QDs) via a solution process, and then have selected three different anti-solvents to purify the product. A significant effect on optical properties of CsPbBr3-xIx was found after the centrifugation process. Up to a ∼40nm shift was observed in mixed halide CsPbBr3-xIx QDs in both absorbance and PL spectra after purification while there was no obvious change in pure CsPbBr3 when it was subjected to the same purification steps. XPS analysis shows that the Br:I ratio of the CsPbBr3-xIx QDs had changed as a result of exposure to the anti-solvent, causing the change of the band gap and shift of the spectra. It is also shown that iodine can be removed more easily than bromine during the anti-solvent purification. Ab-initio simulations of small CsPbBr3-xIx atomic clusters suggest that exposed Cs ions on Cs-terminated facets are the first species to be attacked by hydrophilic molecules, likely dragging halide ions into solution with them to maintain overall charge neutrality in the material. Charge carrier recombination rates were found to be unchanged and all samples maintained a good PL quantum yield which was more than 44%.
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Affiliation(s)
- Lin Yuan
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney 2052, Australia.
| | - Robert Patterson
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney 2052, Australia
| | - Xiaoming Wen
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney 2052, Australia
| | - Zhilong Zhang
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney 2052, Australia
| | - Gavin Conibeer
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney 2052, Australia
| | - Shujuan Huang
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Sydney 2052, Australia.
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