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Zhou X, Yang M, Shen C, Lian L, Hou L, Zhang J. Synchronously Polishing the Lead-Rich Surface and Passivating Surface Defects of CsPb(Br/I) 3 Quantum Dots for High-Performance Pure-Red PeLEDs. NANO LETTERS 2024; 24:3719-3726. [PMID: 38484387 DOI: 10.1021/acs.nanolett.4c00220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Mixed-halide CsPb(Br/I)3 perovskite quantum dots (QDs) are regarded as one of the most promising candidates for pure-red perovskite light-emitting diodes (PeLEDs) due to their precise spectral tuning property. However, the lead-rich surface of these QDs usually results in halide ion migration and nonradiative recombination loss, which remains a great challenge for high-performance PeLEDs. To solve the above issues, we employ a chelating agent of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid hydrate (DOTA) to polish the lead-rich surface of the QDs and meanwhile introduce a new ligand of 2,3-dimercaptosuccinic acid (DMSA) to passivate surface defects of the QDs. This synchronous post-treatment strategy results in high-quality CsPb(Br/I)3 QDs with suppressed halide ion migration and an improved photoluminescence quantum yield, which enables us to fabricate spectrally stable pure-red PeLEDs with a peak external quantum efficiency of 23.2%, representing one of the best performance pure-red PeLEDs based on mixed-halide CsPb(Br/I)3 QDs reported to date.
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Affiliation(s)
- Xin Zhou
- National & Local Joint Engineering Research Center of Semiconductor Display and Optical Communication Devices, South China University of Technology, Guangzhou 510641, China
- Guangdong Provincial Key Laboratory of Semiconductor Micro Display, Foshan Nationstar Optoelectronics Company Ltd., Foshan 528000, China
| | - Mengmeng Yang
- Guangdong Provincial Key Laboratory of Chip and Integration Technology, School of Semiconductor Science and Technology, South China Normal University, Foshan 528225, China
| | - Chao Shen
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, China
| | - Linyuan Lian
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Lintao Hou
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, Guangzhou 510632, China
| | - Jibin Zhang
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
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2
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Yang X, Wang S, Hou Y, Wang Y, Zhang T, Chen Y, Chen G, Zhong C, Fan X, Kong X, Wu T, Lu Y, Lin Y, Chen Z. Dual-Ligand Red Perovskite Ink for Electrohydrodynamic Printing Color Conversion Arrays over 2540 dpi in Near-Eye Micro-LED Display. NANO LETTERS 2024; 24:3661-3669. [PMID: 38408021 DOI: 10.1021/acs.nanolett.3c04927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The lack of stability of red perovskite nanocrystals (PeNCs) remains the main problem that restricts their patterning application. In this work, the dual-ligand passivation strategy was introduced to stabilize PeNCs and inhibit their halogen ion migration during high-voltage electrohydrodynamic (EHD) inkjet printing. The as-printed red arrays exhibit the highest emisson intensity and least blue shift compared with samples with other passivation strategies under a high electric field during EHD inkjet printing. Combining with blue and green PeNC inks, single-color and tricolor color conversion layer arrays were successfully printed, with minimum pixel size of 5 μm and the highest spatial resolution of 2540 dpi. The color coordinate of CsPbBrI2 NCs arrays are located close to the red point, with a color gumat of 97.28% of Rec. 2020 standard. All of these show great potential in the application of color conversion layers in a near-eye micro-LED display.
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Affiliation(s)
- Xiao Yang
- Institute of Electromagnetics and Acoustics, School of Electronic Science and Engineering, Xiamen University, Xiamen 361102, China
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
| | - Shuli Wang
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
| | - Yaqi Hou
- Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361102, China
| | - Yuhui Wang
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
| | - Tianqi Zhang
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
| | - Yihang Chen
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
| | - Guolong Chen
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
| | - Chenming Zhong
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
| | - Xiaotong Fan
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
| | - Xuemin Kong
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
| | - Tingzhu Wu
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361102, China
| | - Yijun Lu
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
| | - Yue Lin
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361102, China
| | - Zhong Chen
- Institute of Electromagnetics and Acoustics, School of Electronic Science and Engineering, Xiamen University, Xiamen 361102, China
- Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361102, China
- State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361102, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen 361102, China
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3
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Li Y, Deng M, Zhang X, Qian L, Xiang C. Proton-Prompted Ligand Exchange to Achieve High-Efficiency CsPbI 3 Quantum Dot Light-Emitting Diodes. NANO-MICRO LETTERS 2024; 16:105. [PMID: 38300363 PMCID: PMC10834927 DOI: 10.1007/s40820-024-01321-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 12/11/2023] [Indexed: 02/02/2024]
Abstract
CsPbI3 perovskite quantum dots (QDs) are ideal materials for the next generation of red light-emitting diodes. However, the low phase stability of CsPbI3 QDs and long-chain insulating capping ligands hinder the improvement of device performance. Traditional in-situ ligand replacement and ligand exchange after synthesis were often difficult to control. Here, we proposed a new ligand exchange strategy using a proton-prompted in-situ exchange of short 5-aminopentanoic acid ligands with long-chain oleic acid and oleylamine ligands to obtain stable small-size CsPbI3 QDs. This exchange strategy maintained the size and morphology of CsPbI3 QDs and improved the optical properties and the conductivity of CsPbI3 QDs films. As a result, high-efficiency red QD-based light-emitting diodes with an emission wavelength of 645 nm demonstrated a record maximum external quantum efficiency of 24.45% and an operational half-life of 10.79 h.
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Affiliation(s)
- Yanming Li
- Laboratory of Advanced Nano-Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Ningbo, 315300, People's Republic of China
- Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
| | - Ming Deng
- Laboratory of Advanced Nano-Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Ningbo, 315300, People's Republic of China
- Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, Zhejiang, People's Republic of China
| | - Xuanyu Zhang
- Laboratory of Advanced Nano-Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Ningbo, 315300, People's Republic of China
- Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
- University of Nottingham Ningbo China, Ningbo, 315100, People's Republic of China
| | - Lei Qian
- Laboratory of Advanced Nano-Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Ningbo, 315300, People's Republic of China
- Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
| | - Chaoyu Xiang
- Laboratory of Advanced Nano-Optoelectronic Materials and Devices, Qianwan Institute of CNITECH, Ningbo, 315300, People's Republic of China.
- Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China.
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China.
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4
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Lim JWM, Guo Y, Feng M, Cai R, Sum TC. Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals. J Am Chem Soc 2024; 146:437-449. [PMID: 38158611 DOI: 10.1021/jacs.3c09761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Harnessing quantum confinement (QC) effects in semiconductors to retard hot carrier cooling (HCC) is an attractive approach for enabling efficient hot carrier extraction to overcome the Shockley-Queisser limit. However, there is a debate about whether halide perovskite nanocrystals (PNCs) can effectively exploit these effects. To address this, we utilized pump-probe and multipulse pump-push-probe spectroscopy to investigate HCC behavior in PNCs of varying sizes and cation compositions. Our results validate the presence of an intrinsic phonon bottleneck with clear manifestations of QC effects in small CsPbBr3 PNCs exhibiting slower HCC rates compared to those of larger PNCs. However, the replacement of inorganic Cs+ with organic cations suppresses this intrinsic bottleneck. Furthermore, PNCs exhibit distinct size-dependent HCC behavior in response to changes in the cold carrier densities. We attribute this to the enhanced exciton-exciton interactions in strongly confined PNCs that facilitate Auger heating. Importantly, our findings dispel the existing controversy and provide valuable insights into design principles for engineering QC effects in PNC hot carrier applications.
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Affiliation(s)
- Jia Wei Melvin Lim
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Yuanyuan Guo
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Minjun Feng
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Rui Cai
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Tze Chien Sum
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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5
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Giancaspro M, Panniello A, Depalo N, Comparelli R, Striccoli M, Curri ML, Fanizza E. Understanding the Effect of the Synthetic Method and Surface Chemistry on the Properties of CsPbBr 3 Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 14:81. [PMID: 38202535 PMCID: PMC10780980 DOI: 10.3390/nano14010081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/22/2023] [Accepted: 12/25/2023] [Indexed: 01/12/2024]
Abstract
Over the last decade, the attractive properties of CsPbBr3 nanoparticles (NPs) have driven ever-increasing progress in the development of synthetic procedures to obtain high-quality NPs at high concentrations. Understanding how the properties of NPs are influenced by the composition of the reaction mixture in combination with the specific synthetic methodology is crucial, both for further elucidating the fundamental characteristics of this class of materials and for their manufacturing towards technological applications. This work aims to shed light on this aspect by synthesizing CsPbBr3 NPs by means of two well-assessed synthetic procedures, namely, hot injection (HI) and ligand-assisted reprecipitation (LARP) in non-polar solvents, using PbBr2 and Cs2CO3 as precursors in the presence of already widely investigated ligands. The overall goal is to study and compare the properties of the NPs to understand how each synthetic method influences the NPs' size and/or the optical properties. Reaction composition and conditions are purposely tuned towards the production of nanocubes with narrow size distribution, high emission properties, and the highest achievable concentration. As a result, the formation of bulk crystals as precipitate in LARP limits the achievement of a highly concentrated NP solution. The size of the NPs obtained by LARP seems to be poorly affected by the ligands' nature and the excess bromide, as consequence of bromide-rich solvation agents, effectively results in NPs with excellent emission properties. In contrast, NPs synthesized by HI exhibit high reaction yield, diffusion growth-controlled size, and less striking emission properties, probably ascribed to a bromide-deficient condition.
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Affiliation(s)
- Mariangela Giancaspro
- Dipartimento di Chimica, University of Bari, Via Orabona 4, 70126 Bari, Italy;
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
| | - Annamaria Panniello
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
| | - Nicoletta Depalo
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
| | - Roberto Comparelli
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
| | - Marinella Striccoli
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
| | - Maria Lucia Curri
- Dipartimento di Chimica, University of Bari, Via Orabona 4, 70126 Bari, Italy;
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
| | - Elisabetta Fanizza
- Dipartimento di Chimica, University of Bari, Via Orabona 4, 70126 Bari, Italy;
- National Research Council (CNR)-Institute for Physical Chemistry Processes (IPCF), SO Bari, Via Orabona 4, 70126 Bari, Italy; (A.P.); (N.D.); (M.S.)
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM), Bari Research Unit, 50121 Firenze, Italy
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6
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Zhang J, Cai B, Zhou X, Yuan F, Yin C, Wang H, Chen H, Ji X, Liang X, Shen C, Wang Y, Ma Z, Qing J, Shi Z, Hu Z, Hou L, Zeng H, Bai S, Gao F. Ligand-Induced Cation-π Interactions Enable High-Efficiency, Bright, and Spectrally Stable Rec. 2020 Pure-Red Perovskite Light-Emitting Diodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2303938. [PMID: 37464982 DOI: 10.1002/adma.202303938] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/15/2023] [Accepted: 07/17/2023] [Indexed: 07/20/2023]
Abstract
Achieving high-performance perovskite light-emitting diodes (PeLEDs) with pure-red electroluminescence for practical applications remains a critical challenge because of the problematic luminescence property and spectral instability of existing emitters. Herein, high-efficiency Rec. 2020 pure-red PeLEDs, simultaneously exhibiting exceptional brightness and spectral stability, based on CsPb(Br/I)3 perovskite nanocrystals (NCs) capping with aromatic amino acid ligands featuring cation-π interactions, are reported. It is proven that strong cation-π interactions between the PbI6 -octahedra of perovskite units and the electron-rich indole ring of tryptophan (TRP) molecules not only chemically polish the imperfect surface sites, but also markedly increase the binding affinity of the ligand molecules, leading to high photoluminescence quantum yields and greatly enhanced spectral stability of the CsPb(Br/I)3 NCs. Moreover, the incorporation of small-size aromatic TRP ligands ensures superior charge-transport properties of the assembled emissive layers. The resultant devices emitting at around 635 nm demonstrate a champion external quantum efficiency of 22.8%, a max luminance of 12 910 cd m-2 , and outstanding spectral stability, representing one of the best-performing Rec. 2020 pure-red PeLEDs achieved so far.
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Affiliation(s)
- Jibin Zhang
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
| | - Bo Cai
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China
- State Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing, 210023, China
| | - Xin Zhou
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, 510632, China
| | - Fanglong Yuan
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
| | - Chunyang Yin
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Heyong Wang
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
| | - Hongting Chen
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, 510632, China
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China
| | - Xinzhen Ji
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
| | - Xiangfei Liang
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, 510632, China
| | - Chao Shen
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, 510632, China
| | - Yu Wang
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
| | - Zhuangzhuang Ma
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
| | - Jian Qing
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, 510632, China
| | - Zhifeng Shi
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
| | - Zhangjun Hu
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
| | - Lintao Hou
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Physics, Jinan University, Guangzhou, 510632, China
| | - Haibo Zeng
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China
| | - Sai Bai
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Feng Gao
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
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7
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Huang J, Yin J, Chen J, Gan M, Zhang Z, Tian T, Fei L. Dynamic Observations on Formation of Coffee-Ring Structures from the Degradation of Cesium Lead Halide Perovskite Nanocrystals. J Phys Chem Lett 2023; 14:8563-8570. [PMID: 37724994 DOI: 10.1021/acs.jpclett.3c02166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Nanomaterials of halide perovskites have attracted increasing attention for their remarkable potential in optoelectronic devices, but their instability to environmental factors is the core issue impeding their applications. In this context, the microscopic understanding of their structural degradation mechanisms upon external stimuli remains incomplete. Herein, we took an emerging member of this material family, Cs4PbBr6 nanocrystals (NCs), as an example and investigated the degradation pathways as well as underlying mechanisms under an electron beam by using in situ transmission electron microscopy. Our atomic-scale study identified the distinct degradation stages for the NCs toward interesting coffee-ring PbBr2 structures, which are caused by the organic surface capping agents as well as surface energy of NCs. Our findings present a fundamental insight for the degradation of halide perovskite NCs and may provide indispensable guidance for their structural design and stability improvement.
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Affiliation(s)
- Jiawei Huang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jialin Yin
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Jiaqi Chen
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Min Gan
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Zhouyang Zhang
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Tingfang Tian
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Linfeng Fei
- School of Physics and Materials Science, Nanchang University, Nanchang, Jiangxi 330031, China
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8
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Zhu H, Kick M, Ginterseder M, Krajewska CJ, Šverko T, Li R, Lu Y, Shih MC, Van Voorhis T, Bawendi MG. Synthesis of Zwitterionic CsPbBr 3 Nanocrystals with Controlled Anisotropy using Surface-Selective Ligand Pairs. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2304069. [PMID: 37485908 DOI: 10.1002/adma.202304069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 07/06/2023] [Indexed: 07/25/2023]
Abstract
Mechanistic studies of the morphology of lead halide perovskite nanocrystals (LHP-NCs) are hampered by a lack of generalizable suitable synthetic strategies and ligand systems. Here, the synthesis of zwitterionic CsPbBr3 NCs is presented with controlled anisotropy using a proposed "surface-selective ligand pairs" strategy. Such a strategy provides a platform to systematically study the binding affinity of capping ligand pairs and the resulting LHP morphologies. By using zwitterionic ligands (ZwL) with varying structures, majority ZwL-capped LHP NCs with controlled morphology are obtained, including anisotropic nanoplatelets and nanorods, for the first time. Combining experiments with density functional theory calculations, factors that govern the ligand binding on the different surface facets of LHP-NCs are revealed, including the steric bulkiness of the ligand, the number of binding sites, and the charge distance between binding moieties. This study provides guidance for the further exploration of anisotropic LHP-NCs.
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Affiliation(s)
- Hua Zhu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Matthias Kick
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Matthias Ginterseder
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Chantalle J Krajewska
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Tara Šverko
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Yongli Lu
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Meng-Chen Shih
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Troy Van Voorhis
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Moungi G Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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9
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Yang JN, Wang JJ, Yin YC, Yao HB. Mitigating halide ion migration by resurfacing lead halide perovskite nanocrystals for stable light-emitting diodes. Chem Soc Rev 2023; 52:5516-5540. [PMID: 37482807 DOI: 10.1039/d3cs00179b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Lead halide perovskite nanocrystals are promising for next-generation high-definition displays, especially in light of their tunable bandgaps, high color purities, and high carrier mobility. Within the past few years, the external quantum efficiency of perovskite nanocrystal-based light-emitting diodes has progressed rapidly, reaching the standard for commercial applications. However, the low operational stability of these perovskite nanocrystal-based light-emitting diodes remains a crucial issue for their industrial development. Recent experimental evidence indicates that the migration of ionic species is the primary factor giving rise to the performance degradation of perovskite nanocrystal-based light-emitting diodes, and ion migration is closely related to the defects on the surface of perovskite nanocrystals and at the grain boundaries of their thin films. In this review, we focus on the central idea of surface reconstruction of perovskite nanocrystals, discuss the influence of surface defects on halide ion migration, and summarize recent advances in resurfacing perovskite nanocrystal strategies toward mitigating halide ion migration to improve the stability of the as-fabricated light-emitting diode devices. From the perspective of perovskite nanocrystal resurfacing, we set out a promising research direction for improving both the spectral and operational stability of perovskite nanocrystal-based light-emitting diodes.
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Affiliation(s)
- Jun-Nan Yang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230088, China.
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jing-Jing Wang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230088, China.
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yi-Chen Yin
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230088, China.
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hong-Bin Yao
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230088, China.
- Department of Applied Chemistry, Hefei Science Center of Chinese Academy of Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
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10
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Zhu X, Pan Z, Xu T, Shao X, Gao Z, Xie Q, Ying Y, Pei W, Lin H, Wang J, Tang X, Chen W, Liu Y. Capping Ligand Engineering Enables Stable CsPbBr 3 Perovskite Quantum Dots toward White-Light-Emitting Diodes. Inorg Chem 2023. [PMID: 37229601 DOI: 10.1021/acs.inorgchem.3c01092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
All-inorganic perovskite quantum dots (PeQDs) have sparked extensive research focus on white-light-emitting diodes (WLEDs), but stability and photoluminescence efficiency issues are still remain obstacles impeding their practical application. Here, we reported a facile one-step method to synthesize CsPbBr3 PeQDs at room temperature using branched didodecyldimethylammonium fluoride (DDAF) and short-chain-length octanoic acid as capping ligands. The obtained CsPbBr3 PeQDs have a near-unity photoluminescence quantum yield of 97% due to the effective passivation of DDAF. More importantly, they exhibit much improved stability against air, heat, and polar solvents, maintaining >70% of initial PL intensity. Making use of these excellent optoelectronic properties, WLEDs based on CsPbBr3 PeQDs, CsPbBr1.2I1.8 PeQDs, and blue LEDs were fabricated, which show a color gamut of 122.7% of the National Television System Committee standard, a luminous efficacy of 17.1 lm/W, with a color temperature of 5890 K, and CIE coordinates of (0.32, 0.35). These results indicate that the CsPbBr3 PeQDs have great practical potential in wide-color-gamut displays.
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Affiliation(s)
- Xiaolin Zhu
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Zhangcheng Pan
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Tianyue Xu
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Xiuwen Shao
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Zhaoju Gao
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Qingyu Xie
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Yupeng Ying
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Wei Pei
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
| | - Hao Lin
- Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR 999078, P. R. China
| | - Jia Wang
- Department of Physics, Umeå University, Umeå SE-90187, Sweden
| | - Xiaosheng Tang
- College of Optoelectronic Engineering, Chongqing University of Post and Telecommunications, Chongqing 400065, People's Republic of China
| | - Weiwei Chen
- College of Optoelectronic Engineering, Chongqing University of Post and Telecommunications, Chongqing 400065, People's Republic of China
| | - Yongfeng Liu
- College of Physical Science and Technology & Microelectronics Industry Research Institute, Yangzhou University, Yangzhou 225002, P. R. China
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11
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Crans KD, Bain M, Bradforth SE, Oron D, Kazes M, Brutchey RL. The surface chemistry of ionic liquid-treated CsPbBr3 quantum dots. J Chem Phys 2023; 158:2888842. [PMID: 37144713 DOI: 10.1063/5.0147918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/19/2023] [Indexed: 05/06/2023] Open
Abstract
The power conversion efficiencies of lead halide perovskite thin film solar cells have surged in the short time since their inception. Compounds, such as ionic liquids (ILs), have been explored as chemical additives and interface modifiers in perovskite solar cells, contributing to the rapid increase in cell efficiencies. However, due to the small surface area-to-volume ratio of the large grained polycrystalline halide perovskite films, an atomistic understanding of the interaction between ILs and perovskite surfaces is limited. Here, we use quantum dots (QDs) to study the coordinative surface interaction between phosphonium-based ILs and CsPbBr3. When native oleylammonium oleate ligands are exchanged off the QD surface with the phosphonium cation as well as the IL anion, a threefold increase in photoluminescent quantum yield of as-synthesized QDs is observed. The CsPbBr3 QD structure, shape, and size remain unchanged after ligand exchange, indicating only a surface ligand interaction at approximately equimolar additions of the IL. Increased concentrations of the IL lead to a disadvantageous phase change and a concomitant decrease in photoluminescent quantum yields. Valuable information regarding the coordinative interaction between certain ILs and lead halide perovskites has been elucidated and can be used for informed pairing of beneficial combinations of IL cations and anions.
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Affiliation(s)
- Kyle D Crans
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Matthew Bain
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Stephen E Bradforth
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
| | - Dan Oron
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Miri Kazes
- Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Richard L Brutchey
- Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
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12
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Zhang Y, Hou G, Wu Y, Chen M, Dai Y, Liu S, Zhao Q, Lin H, Fang J, Jing C, Chu J. Surface Reconstruction of CsPbBr 3 Nanocrystals by the Ligand Engineering Approach for Achieving High Quantum Yield and Improved Stability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:6222-6230. [PMID: 37079335 DOI: 10.1021/acs.langmuir.3c00393] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Oleylamine/oleic acid (OAm/OA) as the commonly used ligand is indispensable in the synthesis of perovskite nanocrystals (PNCs). Unfortunately, poor colloidal stability and unsatisfactory photoluminescence quantum yield (PLQY) are observed, resulting from a highly dynamic binding nature between ligands. Herein, we adopt a facile hybrid ligand (DDAB/ZnBr2) passivation strategy to reconstruct the surface chemistry of CsPbBr3 NCs. The hybrid ligand can detach the native surface ligand, in which the acid-base reactions between ligands are suppressed effectively. Also, they can substitute the loose capping ligand, anchor to the surface firmly, and supply sufficient halogens to passivate the surface trap, realizing an exceptional PLQY of 95% and an enhanced tolerance toward ambient storage, UV irradiation, anti-solvents, and thermal treatment. Besides, the as-fabricated white light-emitting diode (WLED) utilizing the PNCs as the green-emitting phosphor has a luminous efficiency around 73 lm/W; the color gamut covers 125% of the NTSC standard.
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Affiliation(s)
- Yu Zhang
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Guangning Hou
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Yong Wu
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Maosheng Chen
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Yannan Dai
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Shaohua Liu
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Qingbiao Zhao
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Hechun Lin
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Junfeng Fang
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Chengbin Jing
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
| | - Junhao Chu
- Engineering Research Center for Nanophotonics & Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices (Ministry of Education), Department of Materials, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, PR China
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13
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Ding Y, Zhang Z, Toso S, Gushchina I, Trepalin V, Shi K, Peng JW, Kuno M. Mixed Ligand Passivation as the Origin of Near-Unity Emission Quantum Yields in CsPbBr 3 Nanocrystals. J Am Chem Soc 2023; 145:6362-6370. [PMID: 36881007 DOI: 10.1021/jacs.2c13527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Key features of syntheses, involving the quaternary ammonium passivation of CsPbBr3 nanocrystals (NCs), include stable, reproducible, and large (often near-unity) emission quantum yields (QYs). The archetypical example involves didodecyl dimethyl ammonium (DDDMA+)-passivated CsPbBr3 NCs where robust QYs stem from interactions between DDDMA+ and NC surfaces. Despite widespread adoption of this synthesis, specific ligand-NC surface interactions responsible for large DDDMA+-passivated NC QYs have not been fully established. Multidimensional nuclear magnetic resonance experiments now reveal a new DDDMA+-NC surface interaction, beyond established "tightly bound" DDDMA+ interactions, which strongly affects observed emission QYs. Depending upon the existence of this new DDDMA+ coordination, NC QYs vary broadly between 60 and 85%. More importantly, these measurements reveal surface passivation through unexpected didodecyl ammonium (DDA+) that works in concert with DDDMA+ to produce near-unity (i.e., >90%) QYs.
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Affiliation(s)
- Yang Ding
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Zhuoming Zhang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Stefano Toso
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Nanochemistry Department, Instituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Irina Gushchina
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Vadim Trepalin
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Kejia Shi
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jeffrey W Peng
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Masaru Kuno
- Department of Chemistry and Biochemistry, 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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14
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Acharjee D, Das A, Panda MK, Barai M, Ghosh S. Facet Engineering for Decelerated Carrier Cooling in Polyhedral Perovskite Nanocrystals. NANO LETTERS 2023; 23:1946-1953. [PMID: 36825851 DOI: 10.1021/acs.nanolett.2c05107] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
We report here the hot carrier (HC) cooling time scales within polyhedral CsPbBr3 nanocrystals (NCs) characterized by different numbers of facets (6 to 26) utilizing a femtosecond upconversion setup. Interestingly, the observed cooling time scale slows many-fold (>10 times) upon opening the new facets on the NC surface. Furthermore, a temperature-dependent study reveals that cooling in multifaceted NCs is polaron mediated, where newly opened polar facets and the soft lattice of CsPbBr3 NCs play pivotal roles. Our hallmark result of slow cooling in polyhedral NCs renders an excellent opportunity for harvesting high-energy carriers by a carefully chosen molecular system. To this end, employing the hole scavenger molecule aniline, we successfully extracted hot holes from optically pumped NCs. We believe that several intriguing properties of the polyhedral NCs, including rapid polaron formation, defect-tolerant nature, and the capability of soft lattice to support slow diffusion of charge carriers, resulted in decelerated cooling.
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Affiliation(s)
- Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Ayendrila Das
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Mrinal Kanti Panda
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Manas Barai
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
| | - Subhadip Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
- Center for Interdisciplinary Sciences (CIS), National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Khurda 752050, Odisha, India
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15
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Sun W, Yun R, Liu Y, Zhang X, Yuan M, Zhang L, Li X. Ligands in Lead Halide Perovskite Nanocrystals: From Synthesis to Optoelectronic Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205950. [PMID: 36515335 DOI: 10.1002/smll.202205950] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/13/2022] [Indexed: 06/17/2023]
Abstract
Ligands are indispensable for perovskite nanocrystals (NCs) throughout the whole lifetime, as they not only play key roles in the controllable synthesis of NCs with different sizes and shapes, but also act as capping shell that affects optical properties and electrical coupling of NCs. Establishing a systematic understanding of the relationship between ligands and perovskite NCs is significant to enable many potential applications of NCs. This review mainly focuses on the influence of ligands on perovskite NCs. First of all, the ligands-dominated size and shape control of NCs is discussed. Whereafter, the surface defects of NCs and the bonding between ligands and perovskite NCs are classified, and corresponding post-treatment of surface defects via ligands is also summarized. Furthermore, advances in engineering the ligands towards the high performance of optoelectronic devices based on perovskite NCs, including photodetector, solar cell, light emitting diode (LED), and laser, and finally to potential challenges are also discussed.
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Affiliation(s)
- Wenda Sun
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin, 300350, China
- Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Nankai University, Tianjin, 300350, China
| | - Rui Yun
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin, 300350, China
- Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Nankai University, Tianjin, 300350, China
| | - Yuling Liu
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin, 300350, China
- Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Nankai University, Tianjin, 300350, China
| | - Xiaodan Zhang
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin, 300350, China
- Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Nankai University, Tianjin, 300350, China
| | - Mingjian Yuan
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin, 300071, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300071, China
| | - Libing Zhang
- Tianjin Key Laboratory of Molecular Optoelectronic, Department of Chemistry, Tianjin University, Tianjin, 300072, China
| | - Xiyan Li
- Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Conversion Center, Nankai University, Tianjin, 300350, China
- Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Nankai University, Tianjin, 300350, China
- Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education, Nankai University, Tianjin, 300350, China
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16
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Banerjee S, Bera S, Pradhan N. Chemically Sculpturing the Facets of CsPbBr 3 Perovskite Platelet Nanocrystals. ACS NANO 2023; 17:678-686. [PMID: 36577129 DOI: 10.1021/acsnano.2c10107] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The facet chemistry of lead halide perovskite nanocrystals is critically important for determining their shape and interface ligand binding. In colloidal nanocrystals, these are mostly controlled by adopting specific synthetic strategies with a selection of the appropriate reactants. However, using selected ligands, the surface of preformed nanocrystals can be reconstructed without altering the crystal phase and lattice structure of their core. This has been shown here for hexagonal-shaped orthorhombic CsPbBr3 platelet nanocrystals. When oleylammonium bromide was added to these postsynthesized platelets, all six edges and two planar facets are transformed from flat to wavy structures. With a variation in concentration, the crest-to-crest distance of these wavy platelets are also tuned. These became possible because of the oleylammonium ions, which changed the {200}, {012} and {020} facets of orthorhombic phase of CsPbBr3 to the more compatible {110} and {002} facets simply by surface atom dissolution. This was also observed for multisegmented platelets having multiple junctions and even for platelets having a size of more than 200 nm. While shape modulations in ionic halide perovskite nanocrystals still face synthetic challenges, these results of surface reconstruction provide strong evidence of the possibility of sculpturing surface facets and shape changes in these nanostructures.
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Affiliation(s)
- Souvik Banerjee
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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17
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Zheng L, Li X, Lian X, Xu R, Liu X, Xuan T, Zeng R, Ni WX, Luo B. Weakening Ligand-Liquid Affinity to Suppress the Desorption of Surface-Passivated Ligands from Perovskite Nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15747-15755. [PMID: 36484684 DOI: 10.1021/acs.langmuir.2c02630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The interfacial migration of surface-bound ligands highly affects the colloidal stability and optical quality of semiconductor nanocrystals, of which the underlying mechanism is not fully understood. Herein, colloidal CsPbBr3 perovskite nanocrystals (PNCs) with fragile dynamic equilibrium of ligands are taken as the examples to reveal the important role of balancing ligand-solid/solvent affinity in suppressing the desorption of ligands. As a micellar surfactant, glycyrrhizic acid (GA) with bulky hydrophobic and hydrophilic groups exhibits a relatively smaller diffusion coefficient (∼440 μm2/s in methanol) and weaker ligand-liquid affinity than that of conventional alkyl amine and carboxy ligands. Consequently, hydrophilic GA-passivated PNCs (PNCs-GA) show excellent colloidal stability in various polar solvents with dielectric constant ranging from 2.2 to 32.6 and efficient photoluminescence with a quantum yield of 85.3%. Due to the suppressed desorption of GA, the morphological and optical properties of PNCs-GA are well maintained after five rounds purification and two months long-term storage. At last, hydrophilic PNCs-GA are successfully patterned through inkjet- and screen-printing technology. These findings offer deep insights into the interfacial chemistry of colloidal NCs and provide a universal strategy for preparing high-quality hydrophilic PNCs.
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Affiliation(s)
- Lingling Zheng
- Department of Medicinal Chemistry, Shantou University Medical College, Shantou, Guangdong Province 515041, P. R. China
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong Province 515063, P. R. China
| | - Xianli Li
- Department of Medicinal Chemistry, Shantou University Medical College, Shantou, Guangdong Province 515041, P. R. China
| | - Xin Lian
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong Province 515063, P. R. China
| | - Ruijie Xu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong Province 515063, P. R. China
| | - Xiaohui Liu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong Province 515063, P. R. China
| | - Tongtong Xuan
- College of Materials, Xiamen University, Xiamen, Fujian Province 361005, P. R. China
| | - Ruosheng Zeng
- School of Physical Science and Technology, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, Guangxi Province 530004, P. R. China
| | - Wen-Xiu Ni
- Department of Medicinal Chemistry, Shantou University Medical College, Shantou, Guangdong Province 515041, P. R. China
| | - Binbin Luo
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou, Guangdong Province 515063, P. R. China
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18
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Das R, Patra A, Dutta SK, Shyamal S, Pradhan N. Facets-Directed Epitaxially Grown Lead Halide Perovskite-Sulfobromide Nanocrystal Heterostructures and Their Improved Photocatalytic Activity. J Am Chem Soc 2022; 144:18629-18641. [PMID: 36174102 DOI: 10.1021/jacs.2c08639] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lead halide perovskite nanocrystal heterostructures have been extensively studied in the recent past for improving their photogenerated charge carriers mobility. However, most of such heterostructures are formed with random connections without having strong evidence of epitaxial relation. Perovskite-chalcohalides are the first in this category, where all-inorganic heterostructures are formed with epitaxial growth. Going beyond one facet, herein, different polyhedral nanocrystals of CsPbBr3 are explored for facet-selective secondary epitaxial sulfobromide growths. Following a decoupled synthesis process, the heterojunctions are selectively established along {110} as well as {200} facets of 26-faceted rhombicuboctahedrons, the {110} facets of armed hexapods, and the {002} facets of 12-faceted dodecahedron nanocrystals of orthorhombic CsPbBr3. Lattice matching induced these epitaxial growths, and their heterojunctions have been extensively studied with electron microscopic imaging. Unfortunately, these heterostructures did not retain the intense host emission because of their indirect band structures, but such combinations are found to be ideal for promoting photocatalytic CO2 reduction. The pseudo-Type-II combination helped here in the successful movement of charge carriers and also improved the rate of catalysis. These results suggest that facet-selective all-inorganic perovskite heterostructures can be epitaxially grown and this could help in improving their catalytic activities.
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Affiliation(s)
- Rajdeep Das
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Avijit Patra
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Sumit Kumar Dutta
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Sanjib Shyamal
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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19
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Mourdikoudis S, Menelaou M, Fiuza-Maneiro N, Zheng G, Wei S, Pérez-Juste J, Polavarapu L, Sofer Z. Oleic acid/oleylamine ligand pair: a versatile combination in the synthesis of colloidal nanoparticles. NANOSCALE HORIZONS 2022; 7:941-1015. [PMID: 35770698 DOI: 10.1039/d2nh00111j] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A variety of colloidal chemical approaches has been developed in the last few decades for the controlled synthesis of nanostructured materials in either water or organic solvents. Besides the precursors, the solvents, reducing agents, and the choice of surfactants are crucial for tuning the composition, morphology and other properties of the resulting nanoparticles. The ligands employed include thiols, amines, carboxylic acids, phosphines and phosphine oxides. Generally, adding a single ligand to the reaction mixture is not always adequate to yield the desired features. In this review, we discuss in detail the role of the oleic acid/oleylamine ligand pair in the chemical synthesis of nanoparticles. The combined use of these ligands belonging to two different categories of molecules aims to control the size and shape of nanoparticles and prevent their aggregation, not only during their synthesis but also after their dispersion in a carrier solvent. We show how the different binding strengths of these two molecules and their distinct binding modes on specific facets affect the reaction kinetics toward the production of nanostructures with tailored characteristics. Additional functions, such as the reducing function, are also noted, especially for oleylamine. Sometimes, the carboxylic acid will react with the alkylamine to form an acid-base complex, which may serve as a binary capping agent and reductant; however, its reducing capacity may range from lower to much lower than that of oleylamine. The types of nanoparticles synthesized in the simultaneous presence of oleic acid and oleylamine and discussed herein include metal oxides, metal chalcogenides, metals, bimetallic structures, perovskites, upconversion particles and rare earth-based materials. Diverse morphologies, ranging from spherical nanoparticles to anisotropic, core-shell and hetero-structured configurations are presented. Finally, the relation between tuning the resulting surface and volume nanoparticle properties and the relevant applications is highlighted.
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Affiliation(s)
- Stefanos Mourdikoudis
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 16628 - Prague 6, Czech Republic.
| | - Melita Menelaou
- Department of Chemical Engineering, Faculty of Geotechnical Sciences and Environmental Management, Cyprus University of Technology, 3036 Limassol, Cyprus.
| | - Nadesh Fiuza-Maneiro
- CINBIO, Universidade de Vigo, Materials Chemistry and Physics, Department of Physical Chemistry, Campus Universitario Lagoas Marcosende, 36310 Vigo, Spain.
| | - Guangchao Zheng
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, 450001, China
| | - Shuangying Wei
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 16628 - Prague 6, Czech Republic.
| | - Jorge Pérez-Juste
- CINBIO, Universidade de Vigo, Departamento de Química Física, Campus Universitario As Lagoas, Marcosende, 36310 Vigo, Spain
- Galicia Sur Health Research Institute (IIS Galicia Sur), 36310 Vigo, Spain
| | - Lakshminarayana Polavarapu
- CINBIO, Universidade de Vigo, Materials Chemistry and Physics, Department of Physical Chemistry, Campus Universitario Lagoas Marcosende, 36310 Vigo, Spain.
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 16628 - Prague 6, Czech Republic.
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20
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Li J, Fan Y, Xuan T, Zhang H, Li W, Hu C, Zhuang J, Liu RS, Lei B, Liu Y, Zhang X. In Situ Growth of High-Quality CsPbBr 3 Quantum Dots with Unusual Morphology inside a Transparent Glass with a Heterogeneous Crystallization Environment for Wide Gamut Displays. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30029-30038. [PMID: 35737890 DOI: 10.1021/acsami.2c06653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
All-inorganic CsPbBr3 perovskite quantum dots (QDs) are considered to be one of the most promising green candidates for the new-generation backlight displays. The pending barriers to their applications, however, lie in their mismatching of the target window of green light, scalable production, susceptibility to the leaching of lead ions, and instability in harsh environments (such as moisture, light, and heat). Herein, high-quality CsPbBr3 QDs with globoid shapes and cuboid shapes were in situ crystallized/grown inside a well-designed glass to produce nanocomposites with peak emission at 526 nm, which not only exhibited photoluminescence quantum yields of 53 and 86% upon 455 and 365 nm excitation, respectively, but also have been imparted of high stability when they were submerged in water and exposed to heat and light. These characteristics, along with their lead self-sequestration capability and easy-to-scale preparation, can enable breakthrough applications for CsPbBr3 QDs in the field of wide color gamut backlit display. A high-performance backlight white LEDs was fabricated using the CsPbBr3 QDs@glass powder and K2SiF6:Mn4+ red phosphor, which shows a color gamut of ∼126% of the NTSC or 94% of the Rec. 2020 standards.
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Affiliation(s)
- Juqing Li
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Yanhong Fan
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Tongtong Xuan
- College of Materials, Xiamen University, Xiamen 361005, Fujian, P.R. China
| | - Haoran Zhang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Wei Li
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Chaofan Hu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Jianle Zhuang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Ru-Shi Liu
- Department of Chemistry, National Taipei University of Technology, Taipei 106, Taiwan
| | - Bingfu Lei
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Yingliang Liu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
| | - Xuejie Zhang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, South China Agricultural University, Guangzhou 510642, Guangdong, P.R. China
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21
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Grisorio R, Fasulo F, Muñoz-García AB, Pavone M, Conelli D, Fanizza E, Striccoli M, Allegretta I, Terzano R, Margiotta N, Vivo P, Suranna GP. In Situ Formation of Zwitterionic Ligands: Changing the Passivation Paradigms of CsPbBr 3 Nanocrystals. NANO LETTERS 2022; 22:4437-4444. [PMID: 35609011 PMCID: PMC9185741 DOI: 10.1021/acs.nanolett.2c00937] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
CsPbBr3 nanocrystals (NCs) passivated by conventional lipophilic capping ligands suffer from colloidal and optical instability under ambient conditions, commonly due to the surface rearrangements induced by the polar solvents used for the NC purification steps. To avoid onerous postsynthetic approaches, ascertained as the only viable stability-improvement strategy, the surface passivation paradigms of as-prepared CsPbBr3 NCs should be revisited. In this work, the addition of an extra halide source (8-bromooctanoic acid) to the typical CsPbBr3 synthesis precursors and surfactants leads to the in situ formation of a zwitterionic ligand already before cesium injection. As a result, CsPbBr3 NCs become insoluble in nonpolar hexane, with which they can be washed and purified, and form stable colloidal solutions in a relatively polar medium (dichloromethane), even when longly exposed to ambient conditions. The improved NC stability stems from the effective bidentate adsorption of the zwitterionic ligand on the perovskite surfaces, as supported by theoretical investigations. Furthermore, the bidentate functionalization of the zwitterionic ligand enables the obtainment of blue-emitting perovskite NCs with high PLQYs by UV-irradiation in dichloromethane, functioning as the photoinduced chlorine source.
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Affiliation(s)
- Roberto Grisorio
- Dipartimento
di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica
(DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy
- CNR
NANOTEC − Istituto di Nanotecnologia, Via Monteroni, 73100 Lecce, Italy
- E-mail:
| | - Francesca Fasulo
- Dipartimento
di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cintia 21, 80126 Napoli, Italy
| | - Ana Belén Muñoz-García
- Dipartimento
di Fisica “Ettore Pancini”, Università di Napoli
Federico II, Complesso Universitario di
Monte Sant’Angelo, Via Cintia 21, 80126 Napoli, Italy
| | - Michele Pavone
- Dipartimento
di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo, Via Cintia 21, 80126 Napoli, Italy
| | - Daniele Conelli
- Dipartimento
di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica
(DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy
| | - Elisabetta Fanizza
- Dipartimento
di Chimica, Università degli Studi
di Bari “A. Moro”, Via Orabona 4, 70126 Bari, Italy
| | - Marinella Striccoli
- CNR−Istituto
per i Processi Chimico Fisici, UOS Bari, Via Orabona 4, 70126 Bari, Italy
| | - Ignazio Allegretta
- Dipartimento
di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari “Aldo Moro”, Via G. Amendola 165/A, 70126 Bari, Italy
| | - Roberto Terzano
- Dipartimento
di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari “Aldo Moro”, Via G. Amendola 165/A, 70126 Bari, Italy
| | - Nicola Margiotta
- Dipartimento
di Chimica, Università degli Studi
di Bari “A. Moro”, Via Orabona 4, 70126 Bari, Italy
| | - Paola Vivo
- Hybrid
Solar Cells, Faculty of Engineering and Natural Sciences, Tampere University, P.O. Box 541, FI-33014 Tampere, Finland
| | - Gian Paolo Suranna
- Dipartimento
di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica
(DICATECh), Politecnico di Bari, Via Orabona 4, 70125 Bari, Italy
- CNR
NANOTEC − Istituto di Nanotecnologia, Via Monteroni, 73100 Lecce, Italy
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22
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Almalki M, Dučinskas A, Carbone LC, Pfeifer L, Piveteau L, Luo W, Lim E, Gaina PA, Schouwink PA, Zakeeruddin SM, Milić JV, Grätzel M. Nanosegregation in arene-perfluoroarene π-systems for hybrid layered Dion-Jacobson perovskites. NANOSCALE 2022; 14:6771-6776. [PMID: 35403184 PMCID: PMC9109678 DOI: 10.1039/d1nr08311b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/12/2022] [Indexed: 05/11/2023]
Abstract
Layered hybrid perovskites are based on organic spacers separating hybrid perovskite slabs. We employ arene and perfluoroarene moieties based on 1,4-phenylenedimethylammonium (PDMA) and its perfluorinated analogue (F-PDMA) in the assembly of hybrid layered Dion-Jacobson perovskite phases. The resulting materials are investigated by X-ray diffraction, UV-vis absorption, photoluminescence, and solid-state NMR spectroscopy to demonstrate the formation of layered perovskite phases. Moreover, their behaviour was probed in humid environments to reveal nanoscale segregation of layered perovskite species based on PDMA and F-PDMA components, along with enhanced stabilities of perfluoroarene systems, which is relevant to their application.
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Affiliation(s)
- Masaud Almalki
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - Algirdas Dučinskas
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
- Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany
| | - Loï C Carbone
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - Lukas Pfeifer
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - Laura Piveteau
- Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Weifan Luo
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland.
| | - Ethan Lim
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland.
| | - Patricia A Gaina
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland.
| | - Pascal A Schouwink
- Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1951 Sion, Switzerland
| | - Shaik M Zakeeruddin
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
| | - Jovana V Milić
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
- Adolphe Merkle Institute, University of Fribourg, 1700 Fribourg, Switzerland.
| | - Michael Grätzel
- Laboratory of Photonics and Interfaces, Institute of Chemistry and Chemical Engineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
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23
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Hoang MT, Pannu AS, Yang Y, Madani S, Shaw P, Sonar P, Tesfamichael T, Wang H. Surface Treatment of Inorganic CsPbI 3 Nanocrystals with Guanidinium Iodide for Efficient Perovskite Light-Emitting Diodes with High Brightness. NANO-MICRO LETTERS 2022; 14:69. [PMID: 35237871 PMCID: PMC8891416 DOI: 10.1007/s40820-022-00813-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/24/2022] [Indexed: 05/14/2023]
Abstract
The remarkable evolution of metal halide perovskites in the past decade makes them promise for next-generation optoelectronic material. In particular, nanocrystals (NCs) of inorganic perovskites have demonstrated excellent performance for light-emitting and display applications. However, the presence of surface defects on the NCs negatively impacts their performance in devices. Herein, we report a compatible facial post-treatment of CsPbI3 nanocrystals using guanidinium iodide (GuI). It is found that the GuI treatment effectively passivated the halide vacancy defects on the surface of the NCs while offering effective surface protection and exciton confinement thanks to the beneficial contribution of iodide and guanidinium cation. As a consequence, the film of treated CsPbI3 nanocrystals exhibited significantly enhanced luminescence and charge transport properties, leading to high-performance light-emitting diode with maximum external quantum efficiency of 13.8% with high brightness (peak luminance of 7039 cd m-2 and a peak current density of 10.8 cd A-1). The EQE is over threefold higher than performance of untreated device (EQE: 3.8%). The operational half-lifetime of the treated devices also was significantly improved with T50 of 20 min (at current density of 25 mA cm-2), outperforming the untreated devices (T50 ~ 6 min).
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Affiliation(s)
- Minh Tam Hoang
- Faculty of Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Amandeep Singh Pannu
- Faculty of Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Yang Yang
- Faculty of Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Sepideh Madani
- Faculty of Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Paul Shaw
- Centre for Organic Photonics & Electronics (COPE), School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Prashant Sonar
- Faculty of Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Tuquabo Tesfamichael
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia
- School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia
| | - Hongxia Wang
- Faculty of Science, School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
- Centre for Materials Science, Queensland University of Technology, Brisbane, QLD, 4001, Australia.
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24
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Zaccaria F, Zhang B, Goldoni L, Imran M, Zito J, van Beek B, Lauciello S, De Trizio L, Manna L, Infante I. The Reactivity of CsPbBr 3 Nanocrystals toward Acid/Base Ligands. ACS NANO 2022; 16:1444-1455. [PMID: 35005882 PMCID: PMC8793808 DOI: 10.1021/acsnano.1c09603] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/23/2021] [Indexed: 05/20/2023]
Abstract
The interaction of lead bromide perovskite nanocrystals with charged ligands, such as salts, zwitterions, or acid-base pairs, has been extensively documented over the past few years. On the other hand, little is known about the reactivity of perovskite nanocrystals toward neutral ligands. To fill this gap, in this work we study the interaction of CsPbBr3 nanocrystals passivated with didodecyldimethylammonium bromide (DDABr) toward a series of exogenous acid/base ligands using a combined computational and experimental approach. Our analysis indicates that DDABr-capped nanocrystals are inert toward most ligands, except for carboxylic, phosphonic, and sulfonic acids. In agreement with the calculations, our experimental results indicate that the higher the acidity of the ligands employed in the treatment, the more etching is observed. In detail, dodecylbenzenesulfonic acid (pKa = -1.8) is found to etch the nanocrystals, causing their complete degradation. On the other hand, oleic and oleylphosphonic acids (pKa 9.9 and 2, respectively) interact with surface-bound DDA molecules, causing their displacement as DDABr in various amounts, which can be as high as 40% (achieved with oleylphosphonic acid). Despite the stripping of DDA ligands, the optical properties of the nanocrystals, as well as structure and morphology, remain substantially unaffected, empirically demonstrating the defect tolerance characterizing such materials. Our study provides not only a clear overview on the interaction between perovskite nanocrystals and neutral ligands but also presents an effective ligand stripping strategy.
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Affiliation(s)
- Francesco Zaccaria
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Baowei Zhang
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, 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 Goldoni
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Muhammad Imran
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Juliette Zito
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, 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
| | - Bas van Beek
- Department
of Theoretical Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Simone Lauciello
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Luca De Trizio
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Ivan Infante
- Department
of Nanochemistry, Analytical Chemistry Lab, and Electron Microscopy Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Department
of Theoretical Chemistry, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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25
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Bai Y, Hao M, Ding S, Chen P, Wang L. Surface Chemistry Engineering of Perovskite Quantum Dots: Strategies, Applications, and Perspectives. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2105958. [PMID: 34643300 DOI: 10.1002/adma.202105958] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 10/07/2021] [Indexed: 05/27/2023]
Abstract
The presence of surface ligands not only plays a key role in keeping the colloidal integrity and non-defective surface of metal halide perovskite quantum dots (PQDs), but also serves as a knob to tune their optoelectronic properties for a variety of exciting applications including solar cells and light-emitting diodes. However, these indispensable surface ligands may also deteriorate the stability and key properties of PQDs due to their highly dynamic binding and insulating nature. To address these issues, a number of innovative surface chemistry engineering approaches have been developed in the past few years. Based on an in-depth fundamental understanding of the surface atomistic structure and surface defect formation mechanism in the tiny nanoparticles, a critical overview focusing on the surface chemistry engineering of PQDs including advanced colloidal synthesis, in-situ surface passivation, and solution-phase/solid-state ligand exchange is presented, after which their unprecedented achievements in photovoltaics and other optoelectronics are presented. The practical hurdles and future directions are critically discussed to inspire more rational design of PQD surface chemistry toward practical applications.
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Affiliation(s)
- Yang Bai
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia
| | - Mengmeng Hao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia
| | - Shanshan Ding
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia
| | - Peng Chen
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia
| | - Lianzhou Wang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia
- School of Chemical Engineering, The University of Queensland, St Lucia, Brisbane, Queensland, 4072, Australia
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26
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Bera S, Behera RK, Das Adhikari S, Guria AK, Pradhan N. Equilibriums in Formation of Lead Halide Perovskite Nanocrystals. J Phys Chem Lett 2021; 12:11824-11833. [PMID: 34870990 DOI: 10.1021/acs.jpclett.1c03461] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Physical insights related to ion equilibrium involved in the synthesis of lead halide perovskite nanocrystals remain key parameters for regulating the phase stability and luminescence intensity of these emerging materials. These have been extensively studied since the development of these nanocrystals, and different reaction processes controlling the formation of CsPbX3 nanocrystals are largely understood. However, growth kinetics related to the formation of these nanocrystals have not been established yet. Hence, more fundamental understanding of the formation processes of these nanocrystals is urgently required. Keeping these in mind and emphasizing the most widely studied nanocrystals of CsPbBr3, different equilibrium processes involved in their synthesis for phase and composition variations are summarized and discussed in this Perspective. In addition, implementations of these findings for shape modulations by growth are discussed, and several new directions of research for understanding more fundamental insights are also presented.
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Affiliation(s)
- Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Rakesh Kumar Behera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Samrat Das Adhikari
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Amit K Guria
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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27
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Kipkorir A, DuBose J, Cho J, Kamat PV. CsPbBr 3-CdS heterostructure: stabilizing perovskite nanocrystals for photocatalysis. Chem Sci 2021; 12:14815-14825. [PMID: 34820097 PMCID: PMC8597851 DOI: 10.1039/d1sc04305f] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 10/21/2021] [Indexed: 11/23/2022] Open
Abstract
The instability of cesium lead bromide (CsPbBr3) nanocrystals (NCs) in polar solvents has hampered their use in photocatalysis. We have now succeeded in synthesizing CsPbBr3-CdS heterostructures with improved stability and photocatalytic performance. While the CdS deposition provides solvent stability, the parent CsPbBr3 in the heterostructure harvests photons to generate charge carriers. This heterostructure exhibits longer emission lifetime (τ ave = 47 ns) than pristine CsPbBr3 (τ ave = 7 ns), indicating passivation of surface defects. We employed ethyl viologen (EV2+) as a probe molecule to elucidate excited state interactions and interfacial electron transfer of CsPbBr3-CdS NCs in toluene/ethanol mixed solvent. The electron transfer rate constant as obtained from transient absorption spectroscopy was 9.5 × 1010 s-1 and the quantum efficiency of ethyl viologen reduction (Φ EV+˙) was found to be 8.4% under visible light excitation. The Fermi level equilibration between CsPbBr3-CdS and EV2+/EV+˙ redox couple has allowed us to estimate the apparent conduction band energy of the heterostructure as -0.365 V vs. NHE. The insights into effective utilization of perovskite nanocrystals built around a quasi-type II heterostructures pave the way towards effective utilization in photocatalytic reduction and oxidation processes.
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Affiliation(s)
- Anthony Kipkorir
- Radiation Laboratory, University of Notre Dame Notre Dame Indiana 46556 USA
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Jeffrey DuBose
- Radiation Laboratory, University of Notre Dame Notre Dame Indiana 46556 USA
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Junsang Cho
- Radiation Laboratory, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Prashant V Kamat
- Radiation Laboratory, University of Notre Dame Notre Dame Indiana 46556 USA
- Department of Chemistry and Biochemistry, University of Notre Dame Notre Dame Indiana 46556 USA
- Department of Chemical and Biomolecular Engineering, University of Notre Dame Notre Dame Indiana 46556 USA
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28
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Bera S, Shyamal S, Pradhan N. Chemically Spiraling CsPbBr 3 Perovskite Nanorods. J Am Chem Soc 2021; 143:14895-14906. [PMID: 34469686 DOI: 10.1021/jacs.1c07231] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Light emitting lead halide perovskite nanocrystals are currently emerging as the workhorse in quantum dot research. Most of these reported nanocrystals are isotropic cubes or polyhedral; but anisotropic nanostructures with controlled anisotropic directions still remain a major challenge. For orthorhombic CsPbBr3, the 1D shaped nanostructures reported are linear and along either of the axial directions ⟨100⟩. In contrast, herein, spiral CsPbBr3 perovskite nanorods in the orthorhombic phase are reported with unusual anisotropy having (101) planes remaining perpendicular to the major axis [201]. While these nanorods are synthesized using the prelattice of orthorhombic Cs2CdBr4 with Pb(II) diffusion, the spirality is controlled by manipulation of the compositions of alkylammonium ions in the reaction system which selectively dissolve some spiral facets of the nanorods. Further, as spirality varied with facet creation and elimination, these nanorods were explored as photocatalysts for CO2 reduction, and the evolution of methane was also found to be dependent on the depth of the spiral nanorods. The entire study demonstrates facet manipulation of complex nanorods, and these results suggest that even if perovskites are ionic in nature, their shape could be constructed by design with proper reaction manipulation.
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Affiliation(s)
- Suman Bera
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Sanjib Shyamal
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Narayan Pradhan
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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29
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Imran M, Mai BT, Goldoni L, Cirignano M, Jalali HB, Di Stasio F, Pellegrino T, Manna L. Switchable Anion Exchange in Polymer-Encapsulated APbX 3 Nanocrystals Delivers Stable All-Perovskite White Emitters. ACS ENERGY LETTERS 2021; 6:2844-2853. [PMID: 34423129 PMCID: PMC8369489 DOI: 10.1021/acsenergylett.1c01232] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 07/06/2021] [Indexed: 05/05/2023]
Abstract
We report a one-step synthesis of halide perovskite nanocrystals embedded in amphiphilic polymer (poly(acrylic acid)-block-poly(styrene), PAA-b-PS) micelles, based on injecting a dimethylformamide solution of PAA-b-PS, PbBr2, ABr (A = Cs, formamidinium, or both) and "additive" molecules in toluene. These bifunctional or trifunctional short chain organic molecules improve the nanocrystal-polymer compatibility, increasing the nanocrystal stability against polar solvents and high flux irradiation (the nanocrystals retain almost 80% of their photoluminescence after 1 h of 3.2 w/cm2 irradiation). If the nanocrystals are suspended in toluene, the coil state of the polymer allows the nanocrystals to undergo halide exchange, enabling emission color tunability. If the nanocrystals are suspended in methanol, or dried as powders, the polymer is in the globule state, and they are inert to halide exchange. By mixing three primary colors we could prepare stable, multicolor emissive samples (for example, white emitting powders) and a UV-to-white color converting layer for light-emitting diodes entirely made of perovskite nanocrystals.
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Affiliation(s)
- Muhammad Imran
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Binh T. Mai
- Nanomaterials
for Biomedical Applications, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Luca Goldoni
- Analytical
Chemistry Lab, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Matilde Cirignano
- Photonic
Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Universitàdegli
Studi di Genova, Via
Dodecaneso 31, 16146 Genova, Italy
| | - Houman Bahmani Jalali
- Photonic
Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Francesco Di Stasio
- Photonic
Nanomaterials, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Teresa Pellegrino
- Nanomaterials
for Biomedical Applications, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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30
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Stelmakh A, Aebli M, Baumketner A, Kovalenko MV. On the Mechanism of Alkylammonium Ligands Binding to the Surface of CsPbBr 3 Nanocrystals. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2021; 33:5962-5973. [PMID: 34393361 PMCID: PMC8359008 DOI: 10.1021/acs.chemmater.1c01081] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 06/08/2021] [Indexed: 05/20/2023]
Abstract
CsPbBr3 nanocrystals (NCs) suffer from instabilities caused by the dynamic and labile nature of both the inorganic core and the organic-inorganic interface. Surface ligand engineering thus remains an imminent research topic. In this study, classical molecular dynamics simulations with an explicit solvent are used to gain insights into the inherent binding properties of three different alkylammonium ligands-primary dodecylammonium (DA), secondary didodecylammonium (DDA), and quaternary dimethyldi- dodecylammonium (DMDDA). Our simulations uncover three main factors that govern the effective ligand-substrate interactions: (i) the ability of the head-group to penetrate into the binding pocket, (ii) the strength of head-group interactions with the polar solvent, and (iii) the higher barrier for ligand adsorption/desorption in the case of multiple alkyl chains. The interplay between these factors causes the following order of the binding free energies: DDA < DA ≈ DMDDA, while surface capping with DDA and DMDDA ligands is additionally stabilized by the kinetic barrier. These findings are in agreement with previous experimental observations and with the results of presented ligand-exchange experiments, wherein DDA is found to loosely bind to the CsPbBr3 surface, while DMDDA capping is more stable than capping with the primary oleylammonium ligand. The presented mechanistic understanding of the ligand-NC interactions will aid in the design of cationic ligands that make perovskite NC surfaces more robust.
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Affiliation(s)
- Andriy Stelmakh
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Marcel Aebli
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
| | - Andrij Baumketner
- Institute
for Condensed Matter Physics, NAS of Ukraine, 1 Svientsitsky, Lviv 79011, Ukraine
| | - Maksym V. Kovalenko
- Laboratory
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa—Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
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