1
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Kopteva NE, Yakovlev DR, Yalcin E, Akimov IA, Nestoklon MO, Glazov MM, Kotur M, Kudlacik D, Zhukov EA, Kirstein E, Hordiichuk O, Dirin DN, Kovalenko MV, Bayer M. Highly-Polarized Emission Provided by Giant Optical Orientation of Exciton Spins in Lead Halide Perovskite Crystals. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2403691. [PMID: 38884160 DOI: 10.1002/advs.202403691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/15/2024] [Indexed: 06/18/2024]
Abstract
Quantum technologic and spintronic applications require reliable material platforms that enable significant and long-living spin polarization of excitations, the ability to manipulate it optically in external fields, and the possibility to implement quantum correlations between spins, i.e., entanglement. Here it is demonstrated that these conditions are met in bulk crystals of lead halide perovskites. A giant optical orientation of 85% of excitons, approaching the ultimate limit of unity, in FA0.9Cs0.1PbI2.8Br0.2 crystals is reported. The exciton spin orientation is maintained during the exciton lifetime of 55 ps resulting in high circular polarization of the exciton emission. The optical orientation is robust to detuning of the excitation energy up to 0.3 eV above the exciton resonance and remains larger than 20% up to detunings of 0.9 eV. It evidences pure chiral selection rules and suppressed spin relaxation of electrons and holes, even with large kinetic energies. The exciton and electron-hole recombinations are distinguished by means of the spin dynamics detected via coherent spin quantum beats in magnetic field. Further, electron-hole spin correlations are demonstrated through linear polarization beats after circularly polarized excitation. These findings are supported by atomistic calculations. All-in-all, the results establish lead halide perovskite semiconductors as suitable platform for quantum technologies.
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Affiliation(s)
- Nataliia E Kopteva
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Dmitri R Yakovlev
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Eyüp Yalcin
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Ilya A Akimov
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Mikhail O Nestoklon
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Mikhail M Glazov
- Ioffe Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia
| | - Mladen Kotur
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Dennis Kudlacik
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Evgeny A Zhukov
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Erik Kirstein
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
| | - Oleh Hordiichuk
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, CH-8093, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, CH-8600, Switzerland
| | - Dmitry N Dirin
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, CH-8093, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, CH-8600, Switzerland
| | - Maksym V Kovalenko
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, CH-8093, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, CH-8600, Switzerland
| | - Manfred Bayer
- Experimentelle Physik 2, Technische Universität Dortmund, 44227, Dortmund, Germany
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2
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Liu Y, Ai Q, Ye G, Ye Z, Hrubý J, Wang F, Orlando T, Wang Y, Luo J, Fang Q, Zhang B, Zhai T, Lin CY, Xu C, Zhu Y, Terlier T, Hill S, Zhu H, He R, Lou J. Spin-Phonon Coupling in Iron-Doped Ultrathin Bismuth Halide Perovskite Derivatives. ACS NANO 2024; 18:12560-12568. [PMID: 38700899 DOI: 10.1021/acsnano.4c03216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2024]
Abstract
Spin in semiconductors facilitates magnetically controlled optoelectronic and spintronic devices. In metal halide perovskites (MHPs), doping magnetic ions is proven to be a simple and efficient approach to introducing a spin magnetic momentum. In this work, we present a facile metal ion doping protocol through the vapor-phase metal halide insertion reaction to the chemical vapor deposition (CVD)-grown ultrathin Cs3BiBr6 perovskites. The Fe-doped bismuth halide (Fe:CBBr) perovskites demonstrate that the iron spins are successfully incorporated into the lattice, as revealed by the spin-phonon coupling below the critical temperature Tc around 50 K observed through temperature-dependent Raman spectroscopy. Furthermore, the phonons exhibit significant softening under an applied magnetic field, possibly originating from magnetostriction and spin exchange interaction. The spin-phonon coupling in Fe:CBBr potentially provides an efficient way to tune the spin and lattice parameters for halide perovskite-based spintronics.
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Affiliation(s)
- Yifeng Liu
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Qing Ai
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Gaihua Ye
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Zhipeng Ye
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Jakub Hrubý
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Fan Wang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Tomas Orlando
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
| | - Yuguo Wang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Jiaming Luo
- Applied Physics Program, Smalley-Curl Institute, Rice University, Houston, Texas 77005, United States
| | - Qiyi Fang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Boyu Zhang
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Tianshu Zhai
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Chen-Yang Lin
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Clyde Xu
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Yifan Zhu
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Tanguy Terlier
- SIMS Laboratory, Shared Equipment Authority, Rice University, Houston, Texas 77005, United States
| | - Stephen Hill
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
- Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
| | - Hanyu Zhu
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
| | - Rui He
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Jun Lou
- Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005, United States
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3
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Mopoung K, Ning W, Zhang M, Ji F, Mukhuti K, Engelkamp H, Christianen PCM, Singh U, Klarbring J, Simak SI, Abrikosov IA, Gao F, Buyanova IA, Chen WM, Puttisong Y. Understanding Antiferromagnetic Coupling in Lead-Free Halide Double Perovskite Semiconductors. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:5313-5320. [PMID: 38567374 PMCID: PMC10982993 DOI: 10.1021/acs.jpcc.3c08129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 03/05/2024] [Accepted: 03/05/2024] [Indexed: 04/04/2024]
Abstract
Solution-processable semiconductors with antiferromagnetic (AFM) order are attractive for future spintronics and information storage technology. Halide perovskites containing magnetic ions have emerged as multifunctional materials, demonstrating a cross-link between structural, optical, electrical, and magnetic properties. However, stable optoelectronic halide perovskites that are antiferromagnetic remain sparse, and the critical design rules to optimize magnetic coupling still must be developed. Here, we combine the complementary magnetometry and electron-spin-resonance experiments, together with first-principles calculations to study the antiferromagnetic coupling in stable Cs2(Ag:Na)FeCl6 bulk semiconductor alloys grown by the hydrothermal method. We show the importance of nonmagnetic monovalence ions at the BI site (Na/Ag) in facilitating the superexchange interaction via orbital hybridization, offering the tunability of the Curie-Weiss parameters between -27 and -210 K, with a potential to promote magnetic frustration via alloying the nonmagnetic BI site (Ag:Na ratio). Combining our experimental evidence with first-principles calculations, we draw a cohesive picture of the material design for B-site-ordered antiferromagnetic halide double perovskites.
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Affiliation(s)
- Kunpot Mopoung
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Weihua Ning
- Institute
of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, P.R. China
| | - Muyi Zhang
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Fuxiang Ji
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Kingshuk Mukhuti
- High
Field Magnet Laboratory (HFML - EMFL), Radboud
University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Hans Engelkamp
- High
Field Magnet Laboratory (HFML - EMFL), Radboud
University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Peter C. M. Christianen
- High
Field Magnet Laboratory (HFML - EMFL), Radboud
University, Toernooiveld 7, Nijmegen 6525 ED, The Netherlands
| | - Utkarsh Singh
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Johan Klarbring
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Sergei I. Simak
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
- Department
of Physics and Astronomy, Uppsala University, Uppsala SE-75120, Sweden
| | - Igor A. Abrikosov
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Feng Gao
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Irina A. Buyanova
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
| | - Weimin M. Chen
- Department
of Physics (IFM), Linköping University, Linköping 583 30, Sweden
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4
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Chen Z, Wang C, Xue J, Chen J, Mao L, Liu H, Lu H. Observation of Ferromagnetism in Dilute Magnetic Halide Perovskite Semiconductors. NANO LETTERS 2024; 24:3125-3132. [PMID: 38421805 DOI: 10.1021/acs.nanolett.3c04982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Dilute magnetic semiconductors (DMSs) have attracted much attention because of their potential use in spintronic devices. Here, we demonstrate the observation of robust ferromagnetism in a solution-processable halide perovskite semiconductor with dilute magnetic ions. By codoping of magnetic (Fe2+) and aliovalent (Bi3+) metal ions into CH3NH3PbCl3 (MAPbCl3) perovskite, ferromagnetism with well-saturated magnetic hysteresis loops and a maximum coercivity field of 1280 Oe was observed below 12 K. The ferromagnetic resonance measurements revealed that the incorporation of aliovalent ions modulates the carrier concentration and plays an essential role in realizing the ferromagnetism in dilute magnetic halide perovskites. Magnetic ions are proposed to interact through itinerant charge carriers to achieve ferromagnetic coupling. Our work provides a new avenue for the development of solution-processable magnetic semiconductors.
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Affiliation(s)
- Zhongwei Chen
- Department of Chemistry, The Hong Kong University of Science and Technology, Kowloon, Hong Kong (SAR) 999077, People's Republic of China
| | - Chunmei Wang
- Guangdong Provincial Key Laboratory of Semiconductor, Optoelectronic Materials and Intelligent Photonic Systems, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
| | - Jie Xue
- Department of Chemistry, The Hong Kong University of Science and Technology, Kowloon, Hong Kong (SAR) 999077, People's Republic of China
| | - Jian Chen
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Lingling Mao
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Haoliang Liu
- Guangdong Provincial Key Laboratory of Semiconductor, Optoelectronic Materials and Intelligent Photonic Systems, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, People's Republic of China
| | - Haipeng Lu
- Department of Chemistry, The Hong Kong University of Science and Technology, Kowloon, Hong Kong (SAR) 999077, People's Republic of China
- Energy Institute, The Hong Kong University of Science and Technology, Kowloon, Hong Kong (SAR) 999077, People's Republic of China
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5
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Dávid A, Morát J, Chen M, Gao F, Fahlman M, Liu X. Mapping Uncharted Lead-Free Halide Perovskites and Related Low-Dimensional Structures. MATERIALS (BASEL, SWITZERLAND) 2024; 17:491. [PMID: 38276430 PMCID: PMC10819976 DOI: 10.3390/ma17020491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 01/13/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
Research on perovskites has grown exponentially in the past decade due to the potential of methyl ammonium lead iodide in photovoltaics. Although these devices have achieved remarkable and competitive power conversion efficiency, concerns have been raised regarding the toxicity of lead and its impact on scaling up the technology. Eliminating lead while conserving the performance of photovoltaic devices is a great challenge. To achieve this goal, the research has been expanded to thousands of compounds with similar or loosely related crystal structures and compositions. Some materials are "re-discovered", and some are yet unexplored, but predictions suggest that their potential applications may go beyond photovoltaics, for example, spintronics, photodetection, photocatalysis, and many other areas. This short review aims to present the classification, some current mapping strategies, and advances of lead-free halide double perovskites, their derivatives, lead-free perovskitoid, and low-dimensional related crystals.
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Affiliation(s)
- Anna Dávid
- Laboratory of Organic Electronics (LOE), Department of Science and Technology, Linköping University, 60174 Norrköping, Sweden;
| | - Julia Morát
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden; (J.M.); (M.C.); (F.G.)
| | - Mengyun Chen
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden; (J.M.); (M.C.); (F.G.)
| | - Feng Gao
- Department of Physics, Chemistry and Biology (IFM), Linköping University, 58183 Linköping, Sweden; (J.M.); (M.C.); (F.G.)
| | - Mats Fahlman
- Laboratory of Organic Electronics (LOE), Department of Science and Technology, Linköping University, 60174 Norrköping, Sweden;
| | - Xianjie Liu
- Laboratory of Organic Electronics (LOE), Department of Science and Technology, Linköping University, 60174 Norrköping, Sweden;
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6
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Li S, Lin H, Chu C, Martin C, MacSwain W, Meulenberg RW, Franck JM, Chakraborty A, Zheng W. Interfacial B-Site Ion Diffusion in All-Inorganic Core/Shell Perovskite Nanocrystals. ACS NANO 2023; 17:22467-22477. [PMID: 37962602 PMCID: PMC10690799 DOI: 10.1021/acsnano.3c05876] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 11/07/2023] [Accepted: 11/08/2023] [Indexed: 11/15/2023]
Abstract
All-inorganic metal halide perovskites (ABX3, X = Cl, Br, or I) show great potential for the fabrication of optoelectronic devices, but the toxicity and instability of lead-based perovskites limit their applications. Shell passivation with a more stable lead-free perovskite is a promising strategy to isolate unstable components from the environment as well as a feasible way to tune the optical properties. However, it is challenging to grow core/shell perovskite nanocrystals (NCs) due to the soft ionic nature of the perovskite lattice. In this work, we developed a facile method to grow a lead-free CsMnCl3 shell on the surface of CsPbCl3 NCs to form CsPbCl3/CsMnCl3 core/shell NCs with enhanced environmental stability and improved photoluminescence (PL) quantum yields (QYs). More importantly, the resulting core/shell perovskite NCs have color-tunable PL due to B-site ion diffusion at the interface of the core/shell NCs. Specifically, B-site Mn diffusion from the CsMnCl3 shell to the CsPbCl3 core leads to a Mn-doped CsPbCl3 core (i.e., Mn:CsPbCl3), which can turn on the Mn PL at around 600 nm. The ratio of Mn PL and host CsPbCl3 PL is highly tunable as a function of the thermal annealing time of the CsPbCl3/CsMnCl3 core/shell NCs. While the halide anion exchange for all-inorganic metal halide perovskites has been well-developed for band-gap-engineered materials, interfacial B-site diffusion in core/shell perovskite NCs is a promising approach for both tunable optical properties and enhanced environmental stability.
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Affiliation(s)
- Shuya Li
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Hanjie Lin
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Chun Chu
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Chandler Martin
- Department
of Physics, Syracuse University, Syracuse, New York 13244, United States
| | - Walker MacSwain
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Robert W. Meulenberg
- Department
of Physics and Astronomy and Frontier Institute for Research in Sensor
Technologies, University of Maine, Orono, Maine 04469, United States
| | - John M. Franck
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Arindam Chakraborty
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
| | - Weiwei Zheng
- Department
of Chemistry, Syracuse University, Syracuse, New York 13244, United States
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7
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Meliakov SR, Zhukov EA, Kulebyakina EV, Belykh VV, Yakovlev DR. Coherent Spin Dynamics of Electrons in CsPbBr 3 Perovskite Nanocrystals at Room Temperature. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2454. [PMID: 37686962 PMCID: PMC10489742 DOI: 10.3390/nano13172454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023]
Abstract
Coherent spin dynamics of charge carriers in CsPbBr3 perovskite nanocrystals are studied in a temperature range of 4-300 K and in magnetic fields of up to 500 mT using time-resolved pump-probe Faraday rotation and differential transmission techniques. We detect electron spin Larmor precession in the entire temperature range. At temperatures below 50 K, hole spin precession is also observed. The temperature dependences of spin-related parameters, such as Landè g-factor and spin dephasing time are measured and analyzed. The electron g-factor increases with growing temperature, which can not be described by the temperature-induced band gap renormalization. We find that photocharging of the nanocrystals with either electrons or holes depends on the sample cooling regime, namely the cooling rate and illumination conditions. The type of the charge carrier provided by the photocharging can be identified via the carrier spin Larmor precession.
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Affiliation(s)
- Sergey R. Meliakov
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - Evgeny A. Zhukov
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | | | - Vasilii V. Belykh
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Dmitri R. Yakovlev
- P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
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8
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Udavant R, Thawarkar S, Rondiya S, Shelke A, Aher R, Ajithkumar TG, Cross RW, Dzade NY, Jadkar S. Lead-Free Solid State Mechanochemical Synthesis of Cs 2NaBi 1-xFe xCl 6 Double Perovskite: Reduces Band Gap and Enhances Optical Properties. Inorg Chem 2023; 62:4861-4871. [PMID: 36920788 DOI: 10.1021/acs.inorgchem.2c04149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Efficient and stable lead-free halide double perovskites (DPs) have attracted great attention for the future generation of electronic devices. Herein, we have developed a doping approach to incorporate Fe3+ ions into the Cs2NaBiCl6 crystal unit and reveal a crystallographic and optoelectronic study of the Cs2NaBi1-xFexCl6 double perovskite. We report a simple solid-state mechanochemical method that has a solvent-free, one-step, green chemistry approach for the synthesis of Cs2NaBi1-xFexCl6 phosphor. The analysis of powder X-ray diffraction (XRD) data determines the contraction of the lattice due to the incorporation of Fe3+ cations, and this effect is well supported by X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), Raman spectroscopy, and solid-state nuclear magnetic resonance spectroscopy (ss-NMR). The band gap is reduced with increasing Fe content owing to the strong overlap of the Fe-3d orbitals with Cl-3p orbitals and shift of the valence band maxima (VBM) toward higher energies, as confirmed by ultraviolet photoelectron spectroscopy (UPS) and density functional theory (DFT) analyses. Photoluminescence (PL) studies of Cs2NaBi1-xFexCl6 phosphors exhibit a large Stokes shift, broadband emission, and increased PL intensity more than ten times for 15% of Fe content phosphor with enhancement in the average decay lifetimes (up to 38 ns) compared to pristine Cs2NaBiCl6 DP. These results indicate that the transition of dark self-trapping of excitons (STEs) into bright STEs enhances yellow emission. XRD, UV, and thermo-gravimetric analysis (TGA) confirmed that the Cs2NaB1-xFexCl6 DPs have good structural and thermal stabilities. Our findings indicate that the doping of Fe3+ cations into the Cs2NaBiCl6 lattice is a constructive strategy to enhance significantly the optoelectronic properties of these phosphors.
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Affiliation(s)
- Rohini Udavant
- Department of Physics, Savitribai Phule Pune University, Pune 411007, Maharashtra, India
| | - Sachin Thawarkar
- Department of Physics, Savitribai Phule Pune University, Pune 411007, Maharashtra, India
| | - Sachin Rondiya
- Department of Materials Engineering, Indian Institute of Science (IISc), Bengaluru 560012, Karnataka, India
| | - Ankita Shelke
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, Maharashtra, India
| | - Rahul Aher
- Department of Physics, Dr. Vishwanath Karad MIT-World Peace University, Kothrud, Pune 411038, Maharashtra, India
| | - Thalasseril G Ajithkumar
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, Maharashtra, India
| | - Russell W Cross
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Nelson Y Dzade
- Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Sandesh Jadkar
- Department of Physics, Savitribai Phule Pune University, Pune 411007, Maharashtra, India
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9
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Kirstein E, Kopteva NE, Yakovlev DR, Zhukov EA, Kolobkova EV, Kuznetsova MS, Belykh VV, Yugova IA, Glazov MM, Bayer M, Greilich A. Mode locking of hole spin coherences in CsPb(Cl, Br) 3 perovskite nanocrystals. Nat Commun 2023; 14:699. [PMID: 36755046 PMCID: PMC9908866 DOI: 10.1038/s41467-023-36165-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 01/19/2023] [Indexed: 02/10/2023] Open
Abstract
The spin physics of perovskite nanocrystals with confined electrons or holes is attracting increasing attention, both for fundamental studies and spintronic applications. Here, stable [Formula: see text] lead halide perovskite nanocrystals embedded in a fluorophosphate glass matrix are studied by time-resolved optical spectroscopy to unravel the coherent spin dynamics of holes and their interaction with nuclear spins of the 207Pb isotope. We demonstrate the spin mode locking effect provided by the synchronization of the Larmor precession of single hole spins in each nanocrystal in the ensemble that are excited periodically by a laser in an external magnetic field. The mode locking is enhanced by nuclei-induced frequency focusing. An ensemble spin dephasing time [Formula: see text] of a nanosecond and a single hole spin coherence time of T2 = 13 ns are measured. The developed theoretical model accounting for the mode locking and nuclear focusing for randomly oriented nanocrystals with perovskite band structure describes the experimental data very well.
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Affiliation(s)
- E. Kirstein
- grid.5675.10000 0001 0416 9637Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - N. E. Kopteva
- grid.5675.10000 0001 0416 9637Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - D. R. Yakovlev
- grid.5675.10000 0001 0416 9637Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany ,grid.4886.20000 0001 2192 9124Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia ,grid.425806.d0000 0001 0656 6476P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - E. A. Zhukov
- grid.5675.10000 0001 0416 9637Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany ,grid.4886.20000 0001 2192 9124Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
| | - E. V. Kolobkova
- grid.35915.3b0000 0001 0413 4629ITMO University, 199034 St. Petersburg, Russia ,grid.437869.70000 0004 0497 4945St. Petersburg State Institute of Technology, 190013 St. Petersburg, Russia
| | - M. S. Kuznetsova
- grid.15447.330000 0001 2289 6897Spin Optics Laboratory, St. Petersburg State University, 198504 St. Petersburg, Russia
| | - V. V. Belykh
- grid.425806.d0000 0001 0656 6476P. N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia
| | - I. A. Yugova
- grid.15447.330000 0001 2289 6897Spin Optics Laboratory, St. Petersburg State University, 198504 St. Petersburg, Russia
| | - M. M. Glazov
- grid.4886.20000 0001 2192 9124Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
| | - M. Bayer
- grid.5675.10000 0001 0416 9637Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - A. Greilich
- grid.5675.10000 0001 0416 9637Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
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10
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Kumar V, Chauhan HC, Nagal V, Hafiz AK, Singh K. Lattice-Distortion-Induced Change in the Magnetic Properties in Br-Defect Host CsPbBr 3 Perovskite Quantum Dots. J Phys Chem Lett 2023; 14:888-896. [PMID: 36662270 DOI: 10.1021/acs.jpclett.2c03576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Herein, we report temperature- and field-induced magnetic states in CsPbBr3 perovskite quantum dots (PQDs) attributed to Br defects. We find that temperature-dependent structural distortion is the main source of various temperature-induced magnetic states in Br-defect host CsPbBr3 PQDs. Comprehensively examined magnetization data through Arrott plots, Langevin and Brillouin function fitting, and structural analysis reveal the presence of various oxidation states (i.e., Pb0, Pb+, Pb2+, and Pb3+) yielding different magnetic states, such as diamagnetic states above 90 K, paramagnetic states below ≈90 K, and perhaps locally ordered states between 58 and 90 K. It is realized from theoretical fits that paramagnetic ions exist (i.e., superparamagnetic behavior) due to Br defects causing Pb+ (and/or Pb3+ ions) in the diamagnetic region. We anticipate that our findings will spur future research of the development of spin-optoelectronics, such as spin light-emitting diodes, and spintronics devices based on CsPbBr3 PQDs.
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Affiliation(s)
- Virendra Kumar
- School of Physical Sciences, Jawaharlal Nehru University (JNU), New Delhi110067, India
| | - Harish Chandr Chauhan
- School of Physical Sciences, Jawaharlal Nehru University (JNU), New Delhi110067, India
| | - Vandana Nagal
- Quantum and Nano-photonics Research Laboratory, Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia (A Central University), New Delhi110025, India
| | - Aurangzeb Khurram Hafiz
- Quantum and Nano-photonics Research Laboratory, Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia (A Central University), New Delhi110025, India
| | - Kedar Singh
- School of Physical Sciences, Jawaharlal Nehru University (JNU), New Delhi110067, India
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11
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Zhang B, Klarbring J, Ji F, Simak SI, Abrikosov IA, Gao F, Rudko GY, Chen WM, Buyanova IA. Lattice Dynamics and Electron-Phonon Coupling in Double Perovskite Cs 2NaFeCl 6. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:1908-1916. [PMID: 36761233 PMCID: PMC9900640 DOI: 10.1021/acs.jpcc.2c07493] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 01/05/2023] [Indexed: 06/18/2023]
Abstract
Phonon-phonon and electron/exciton-phonon coupling play a vitally important role in thermal, electronic, as well as optical properties of metal halide perovskites. In this work, we evaluate phonon anharmonicity and coupling between electronic and vibrational excitations in novel double perovskite Cs2NaFeCl6 single crystals. By employing comprehensive Raman measurements combined with first-principles theoretical calculations, we identify four Raman-active vibrational modes. Polarization properties of these modes imply Fm3̅m symmetry of the lattice, indicative for on average an ordered distribution of Fe and Na atoms in the lattice. We further show that temperature dependence of the Raman modes, such as changes in the phonon line width and their energies, suggests high phonon anharmonicity, typical for double perovskite materials. Resonant multiphonon Raman scattering reveals the presence of high-lying band states that mediate strong electron-phonon coupling and give rise to intense nA 1g overtones up to the fifth order. Strong electron-phonon coupling in Cs2NaFeCl6 is also concluded based on the Urbach tail analysis of the absorption coefficient and the calculated Fröhlich coupling constant. Our results, therefore, suggest significant impacts of phonon-phonon and electron-phonon interactions on electronic properties of Cs2NaFeCl6, important for potential applications of this novel material.
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Affiliation(s)
- Bin Zhang
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
| | - Johan Klarbring
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
| | | | - Sergei I. Simak
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
- Department
of Physics and Astronomy, Uppsala University, UppsalaSE-75120, Sweden
| | - Igor A. Abrikosov
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
| | - Feng Gao
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
| | - Galyna Yu Rudko
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
| | - Weimin M. Chen
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
| | - Irina A. Buyanova
- Department
of Physics, Chemistry and Biology, Linköping
University, LinköpingSE-58183, Sweden
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12
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Muscarella LA, Hutter EM. Halide Double-Perovskite Semiconductors beyond Photovoltaics. ACS ENERGY LETTERS 2022; 7:2128-2135. [PMID: 35719270 PMCID: PMC9199010 DOI: 10.1021/acsenergylett.2c00811] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 05/13/2022] [Indexed: 05/21/2023]
Abstract
Halide double perovskites, A2MIMIIIX6, offer a vast chemical space for obtaining unexplored materials with exciting properties for a wide range of applications. The photovoltaic performance of halide double perovskites has been limited due to the large and/or indirect bandgap of the presently known materials. However, their applications extend beyond outdoor photovoltaics, as halide double perovskites exhibit properties suitable for memory devices, indoor photovoltaics, X-ray detectors, light-emitting diodes, temperature and humidity sensors, photocatalysts, and many more. This Perspective highlights challenges associated with the synthesis and characterization of halide double perovskites and offers an outlook on the potential use of some of the properties exhibited by this so far underexplored class of materials.
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13
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Walsh KM, Pressler K, Crane MJ, Gamelin DR. Ferromagnetism and Spin-Polarized Luminescence in Lead-Free CsEuCl 3 Perovskite Nanocrystals and Thin Films. ACS NANO 2022; 16:2569-2576. [PMID: 35072451 DOI: 10.1021/acsnano.1c09257] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The emergence of next-generation spintronic and spin-photonic technologies will be aided by the development of materials showing strongly coupled magnetic, electronic, and optical properties. Through a combination of magneto-photoluminescence and magnetic circular dichroism spectroscopies we demonstrate strong magneto-optical responses from CsEuCl3 perovskite nanocrystals and thin films in the near-UV/visible region, stemming from the f-d transitions centered at the B-site Eu2+ cations. We show that this material undergoes a ferromagnetic phase transition at ∼3 K in both the nanocrystal and thin-film samples, resulting in complete spin alignment and indicating intrinsic ferromagnetism. We also report the observation of spin-polarized photoluminescence in the presence of a magnetic field at cryogenic temperatures, saturating with a large polarization ratio (ΔI/I = (IL - IR)/(IL + IR)) of nearly 30% at modest magnetic fields (∼2 T). These results highlight CsEuCl3 as an intrinsically ferromagnetic, luminescent metal-halide perovskite with potentially interesting implications for future spin-based technologies using perovskites.
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Affiliation(s)
- Kelly M Walsh
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Kimo Pressler
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Matthew J Crane
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Daniel R Gamelin
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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14
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Alfieri A, Anantharaman SB, Zhang H, Jariwala D. Nanomaterials for Quantum Information Science and Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022:e2109621. [PMID: 35139247 DOI: 10.1002/adma.202109621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 02/04/2022] [Indexed: 06/14/2023]
Abstract
Quantum information science and engineering (QISE)-which entails the use of quantum mechanical states for information processing, communications, and sensing-and the area of nanoscience and nanotechnology have dominated condensed matter physics and materials science research in the 21st century. Solid-state devices for QISE have, to this point, predominantly been designed with bulk materials as their constituents. This review considers how nanomaterials (i.e., materials with intrinsic quantum confinement) may offer inherent advantages over conventional materials for QISE. The materials challenges for specific types of qubits, along with how emerging nanomaterials may overcome these challenges, are identified. Challenges for and progress toward nanomaterials-based quantum devices are condidered. The overall aim of the review is to help close the gap between the nanotechnology and quantum information communities and inspire research that will lead to next-generation quantum devices for scalable and practical quantum applications.
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Affiliation(s)
- Adam Alfieri
- Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Surendra B Anantharaman
- Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Huiqin Zhang
- Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Deep Jariwala
- Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
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15
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Feng C, Zhao Q, Wu C, Luo X, Li S, Li D, Tang G, Zhang G. Theoretical Prediction of Mixed-Valence Layered Halide Perovskites Cs 4M(IV)M(II) 2X 12 (M = Ge, Sn; X = Cl, Br). J Phys Chem Lett 2022; 13:1077-1084. [PMID: 35077165 DOI: 10.1021/acs.jpclett.1c03719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Charge-ordered compounds (i.e., Cu+/Cu2+, Au+/Au3+, In+/In3+, Tl+/Tl3+, Sb3+/Sb5+, and Bi3+/Bi5+) have been widely explored because of their unique physical properties. Here, a new class of ⟨111⟩-oriented mixed-valence layered halide perovskites Cs4M(IV)M(II)2X12 (M = Ge, Sn; X = Cl, Br) with C2/m, R-3m, and I41/amd space groups was predicted by first-principles calculations. Based on the decomposition enthalpy, the phonon spectrum, and the mechanical stability criteria, we found that Cs4GeGe2Cl12 (C2/m and R-3m), Cs4GeGe2Br12 (R-3m), and Cs4GeGe2Br6Cl6 (R-3m) exhibit thermodynamic, dynamical, and mechanical stability. The electronic structure calculations show that the predicted band gap of stable Cs4Ge(IV)Ge(II)2X12 varies from 1.16 to 2.25 eV. And an isolated intermediate conduction band contributed by the Ge(IV) 4s states below the Ge(II)/Ge(IV) 4p states is observed in these compounds, which is similar to previously reported Cs4CuSb2Cl12 but different from Cs4CdM(III)2Cl12 (M = Sb, Bi). In addition, the calculated static dielectric constant and optical absorption coefficient of Cs4GeGe2Br12 are close to those of typical double perovskites (e.g., Cs2AgBiBr6). We believe that our work enriches the family of mixed-valence halide perovskites and provides a new platform for potential optoelectronic semiconductor design.
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Affiliation(s)
- Chunbao Feng
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
- Institute for Advanced Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Qing Zhao
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Changhe Wu
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Xin Luo
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Shichang Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
- Institute for Advanced Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Dengfeng Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
- Institute for Advanced Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Gang Tang
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
| | - Gang Zhang
- Institute of High Performance Computing, A*STAR, 138632, Singapore
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16
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Dakshinamurthy AC, Sudakar C. Sublattice Distortion Enabled Strong Interplay between Phonon Vibrations, Electron-Phonon Coupling, and Self-Trapped Excitonic Emissions in Cs 2Ag 1-xNa xBiCl 6 Double Perovskites. J Phys Chem Lett 2022; 13:433-439. [PMID: 34989587 DOI: 10.1021/acs.jpclett.1c03862] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Sublattice distortion resulting from alloying compositionally distinct double perovskites is shown to influence photoluminescence emission in Cs2Ag1-xNaxBiCl6 (0 < x < 1). The end members show negligible photoluminescence, whereas interestingly the alloys exhibit broad photoluminescence. These emissions are attributed to self-trapped excitons (STE) resulting from sublattice distortions arising due to the mismatch in [AgCl6]5- and [BiCl6]3- octahedra. Change in sublattice distortions plays significant role in the formation and recombination of STEs. The STE emission intensity and quantum yield greatly depend on x, with highest intensity observed for x = 0.75, consistent with a large change in sublattice found at this x. Variation in photoluminescence properties with composition follows a similar trend as that of bandgap and phonon vibrational changes observed due to sublattice distortion. Temperature-dependent phonon vibrations and photoluminescence studies reveal a giant electron-phonon coupling. A strong synergy between STE emissions, electron-phonon coupling, bandgap, and phonon vibrations in double perovskites with sublattice distortions is demonstrated.
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Affiliation(s)
- Athrey C Dakshinamurthy
- Multifunctional Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| | - C Sudakar
- Multifunctional Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
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17
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Lu Y, Wang Q, He R, Zhou F, Yang X, Wang D, Cao H, He W, Pan F, Yang Z, Song C. Highly Efficient Spin‐Filtering Transport in Chiral Hybrid Copper Halides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ying Lu
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Qian Wang
- Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China
| | - Ruilin He
- Department of Chemistry, Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Tsinghua University Beijing 100084 China
| | - Foxin Zhou
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Xia Yang
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Dong Wang
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Hui Cao
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Wanli He
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Feng Pan
- Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China
| | - Zhou Yang
- Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China
| | - Cheng Song
- Key Laboratory of Advanced Materials (MOE) School of Materials Science and Engineering Tsinghua University Beijing 100084 China
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18
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Lu Y, Wang Q, He R, Zhou F, Yang X, Wang D, Cao H, He W, Pan F, Yang Z, Song C. Highly Efficient Spin-Filtering Transport in Chiral Hybrid Copper Halides. Angew Chem Int Ed Engl 2021; 60:23578-23583. [PMID: 34423529 DOI: 10.1002/anie.202109595] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Indexed: 01/03/2023]
Abstract
Chiral Pb(Sn)-I hybrid organic-inorganic perovskites exhibit outstanding chiral-induced spin selectivity (CISS) performance, but the nontoxic lead-free hybrid materials with high stability are still greatly desired for spin filtering in spintronic applications. We synthesize chiral hybrid copper halides (R/S-MBA)2 CuX4 (MBA=methylbenzylammonium; X=Cl, Br) with characteristic 0D CuX4 tetrahedral structural motifs, combining the low toxicity of Cu2+ and air stability of halide ions (Cl- and Br- ). Despite similar structural and electronic features, (R/S-MBA)2 CuBr4 shows much smaller chiroptical activity than the chloride counterpart. Magnetically conductive atomic force microscopy measurements display a typical spin-polarized charge-transport property with high efficiency up to 90 % for both copper halides. Our work expands the CISS effect into eco-friendly and stable metal-organic halides, which is promising for applications in spintronics based on transition-metal hybrid systems.
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Affiliation(s)
- Ying Lu
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Qian Wang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Ruilin He
- Department of Chemistry, Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, 100084, China
| | - Foxin Zhou
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xia Yang
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Dong Wang
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Hui Cao
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wanli He
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Feng Pan
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Zhou Yang
- Department of Materials Physics and Chemistry, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Cheng Song
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
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19
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Song Z, Liu X, Ochani A, Shen S, Li Q, Sun Y, Ruggiero MT. Low-frequency vibrational spectroscopy: a new tool for revealing crystalline magnetic structures in iron phosphate crystals. Phys Chem Chem Phys 2021; 23:22241-22245. [PMID: 34610061 DOI: 10.1039/d1cp03424c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this report, the strong-dependence of low-frequency (terahertz) vibrational dynamics on weak and long-range forces in crystals is leveraged to determine the bulk magnetic configuration of iron phosphate - a promising material for cathodes in lithium ion batteries. We demonstrate that terahertz time-domain spectroscopy - coupled with quantum mechanical simulations - can discern between various spin configurations in FePO4. Furthermore, the results of this work unambiguously show that the well-accepted space group symmetry for FePO4 is incorrect, and the low-frequency spectroscopic measurements provide a clearer picture of the correct structure over the gold-standard of X-ray diffraction. This work opens the door for characterizing, predicting, and interpreting crystalline magnetic ordering using low-frequency vibrational spectroscopy.
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Affiliation(s)
- Zihui Song
- Department of Chemistry, 82 University Place, University of Vermont, Burlington, VT, 05405, USA.
| | - Xudong Liu
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong, Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Anish Ochani
- Department of Chemistry, SUNY College at Old Westbury, Old Westbury, NY 11568, USA
| | - Suling Shen
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong, Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Qiqi Li
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong, Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Yiwen Sun
- National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Guangdong, Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, School of Medicine, Shenzhen University, Shenzhen 518060, China
| | - Michael T Ruggiero
- Department of Chemistry, 82 University Place, University of Vermont, Burlington, VT, 05405, USA.
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20
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Thawarkar S, Rondiya SR, Dzade NY, Khupse N, Jadkar S. Experimental and Theoretical Investigation of the Structural and Opto-electronic Properties of Fe-Doped Lead-Free Cs 2 AgBiCl 6 Double Perovskite. Chemistry 2021; 27:7408-7417. [PMID: 33502782 PMCID: PMC8252727 DOI: 10.1002/chem.202004902] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Indexed: 12/04/2022]
Abstract
Lead-free double perovskites have emerged as stable and non-toxic alternatives to Pb-halide perovskites. Herein, the synthesis of Fe-doped Cs2 AgBiCl6 lead-free double perovskites are reported that display blue emission using an antisolvent method. The crystal structure, morphology, optical properties, band structure, and stability of the Fe-doped double perovskites were investigated systematically. Formation of the Fe-doped Cs2 AgBiCl6 double perovskite is confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis. XRD and thermo-gravimetric analysis (TGA) shows that the Cs2 AgBiCl6 double perovskite has high structural and thermal stability, respectively. Field emission scanning electron microscopy (FE-SEM) analysis revealed the formation of dipyramidal shape Cs2 AgBiCl6 crystals. Furthermore, energy-dispersive X-ray spectroscopy (EDS) mapping shows the overlapping of Cs, Bi, Ag, Fe, and Cl elements and homogenous incorporation of Fe in Cs2 AgBiCl6 double perovskite. The Fe-doped Cs2 AgBiCl6 double perovskite shows a strong absorption at 380 nm. It extends up to 700 nm, suggesting that sub-band gap states transition may originate from the surface defect of the doped perovskite material. The radiative kinetics of the crystals was studied using the time-correlated single-photon counting (TCSPC) technique. Lattice parameters and band gap value of the Fe-doped Cs2 AgBiCl6 double perovskites predicted by the density functional theory (DFT) calculations are confirmed by XRD and UV/Visible spectroscopy analysis. Time-dependent photo-response characteristics of the Fe-doped Cs2 AgBiCl6 double perovskite show fast response and recovery time of charge carriers. We believe that the successful incorporation of Fe in lead-free, environmentally friendly Cs2 AgBiCl6 double perovskite can open a new class of doped double perovskites with significant potential optoelectronics devices fabrication and photocatalytic applications.
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Affiliation(s)
- Sachin Thawarkar
- Department of PhysicsSavitribai Phule Pune UniversityPune411007India
| | - Sachin R. Rondiya
- School of ChemistryCardiff UniversityCardiffCF10 3ATWalesUnited Kingdom
| | - Nelson Y. Dzade
- School of ChemistryCardiff UniversityCardiffCF10 3ATWalesUnited Kingdom
| | - Nageshwar Khupse
- Centre for Materials for Electronic TechnologyDr. Homi Bhabha RoadPune411008India
| | - Sandesh Jadkar
- Department of PhysicsSavitribai Phule Pune UniversityPune411007India
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21
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Zhang Y, Liu X, Sun H, Zhang J, Gao X, Yang C, Li Q, Jiang H, Wang J, Xu D. Strong Self‐Trapped Exciton Emissions in Two‐Dimensional Na‐In Halide Perovskites Triggered by Antimony Doping. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015873] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yu Zhang
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
- College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China
| | - Xingyi Liu
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Huaiyang Sun
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Jinxia Zhang
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Xiaowen Gao
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Chuang Yang
- College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China
| | - Qi Li
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Hong Jiang
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Juan Wang
- College of Chemistry and Chemical Engineering Hubei University Wuhan 430062 China
- Present address: Key Laboratory for the Synthesis and Application of Organic Functional Molecules Ministry of Education of China Wuhan 430062 China
| | - Dongsheng Xu
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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22
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Zhang Y, Liu X, Sun H, Zhang J, Gao X, Yang C, Li Q, Jiang H, Wang J, Xu D. Strong Self-Trapped Exciton Emissions in Two-Dimensional Na-In Halide Perovskites Triggered by Antimony Doping. Angew Chem Int Ed Engl 2021; 60:7587-7592. [PMID: 33448572 DOI: 10.1002/anie.202015873] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/07/2021] [Indexed: 12/26/2022]
Abstract
Soft lattice and strong exciton-phonon coupling have been demonstrated in layered double perovskites (LDPs) recently; therefore, LDPs represents a promising class of compounds as excellent self-trapped exciton (STE) emitters for applications in solid-state lighting. However, few LDPs with outstanding STE emissions have been discovered, and their optoelectronic properties are still unclear. Based on the three-dimensional (3D) Cs2 NaInCl6 , we synthesized two 2D derivatives (PEA)4 NaInCl8 :Sb (PEA=phenethylamine) and (PEA)2 CsNaInCl7 :Sb with monolayer and bilayer inorganic sheets by a combination of dimensional reduction and Sb-doping. Bright broadband emissions were obtained for the first time under ambient temperature and pressure, with photoluminescence quantum efficiency (PLQE) of 48.7 % (monolayer) and 29.3 % (bilayer), superior to current known LDPs. Spectroscopic characterizations and first-principles calculations of excited state indicate the broadband emissions originate from STEs trapped at the introduced [SbCl6 ]3- octahedron.
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Affiliation(s)
- Yu Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.,College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Xingyi Liu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Huaiyang Sun
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jinxia Zhang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Xiaowen Gao
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Chuang Yang
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Qi Li
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Hong Jiang
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Juan Wang
- College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China.,Present address: Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education of China, Wuhan, 430062, China
| | - Dongsheng Xu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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