1
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Zhang XW, Xie K, Wang EG, Li XZ, Cao T. Phonon-Mediated Exciton Relaxation in Two-Dimensional Semiconductors: Selection Rules and Relaxation Pathways. J Phys Chem Lett 2024; 15:7584-7590. [PMID: 39025480 DOI: 10.1021/acs.jpclett.4c01433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Exciton-phonon coupling (ExPC) is crucial for energy relaxation in semiconductors, yet the first-principles calculation of such coupling remains challenging, especially for two-dimensional (2D) systems. Here, an accurate method for calculating ExPC is developed and applied in exciton relaxation problems in monolayer WSe2. Considering the interplay between the exciton wave functions and electron-phonon coupling (EPC) matrix elements, we find that ExPC shows selection rules distinct from the ones of EPC. By employing the Wannier exciton model, we generalize these selection rules, which state that the angular quantum numbers of the exciton must match the winding numbers of the EPC matrix elements for the ExPC to be allowed. To verify our theory and method, we calculate intervalley exciton relaxation pathways, which agree well with a recent experiment.
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Affiliation(s)
- Xiao-Wei Zhang
- International Center for Quantum Materials and School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - Kaichen Xie
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
| | - En-Ge Wang
- International Center for Quantum Materials and School of Physics, Peking University, Beijing 100871, People's Republic of China
- School of Physics, Liaoning University, Shenyang 110036, People's Republic of China
| | - Xin-Zheng Li
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Frontier Science Center for Nano-optoelectronics and School of Physics, Peking University, Beijing 100871, People's Republic of China
| | - Ting Cao
- Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, United States
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2
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Yang H, Dong H, Martens CC, Zheng Y. Nonadiabatic Coupling-Induced Quantum Coherence in Two-Dimensional Materials. J Phys Chem Lett 2024; 15:6363-6369. [PMID: 38857307 PMCID: PMC11194825 DOI: 10.1021/acs.jpclett.4c01140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/20/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024]
Abstract
Two-dimensional materials provide a rich platform demonstrating quantum effects, and the process of electron-hole recombination occurring in them has significant applications in the fields of the photocatalytic and optoelectronic community. Here, we present nonadiabatic coupling-induced quantum coherence and quantum beats in Al-doped blue phosphorene. The work improves our understanding and utilization of nonadiabatic coupling in low-dimensional materials from a new perspective. In addition, our investigations provide meaningful guidance for manipulating quantum coherence in low-dimensional materials and promoting their novel optoelectronic properties.
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Affiliation(s)
- Huan Yang
- School
of Physics, Shandong University, Jinan 250100, China
| | - Hao Dong
- School
of Physics, Shandong University, Jinan 250100, China
| | - Craig C. Martens
- Department
of Chemistry, University of California,
Irvine, Irvine, California 92697-2025, United States
| | - Yujun Zheng
- School
of Physics, Shandong University, Jinan 250100, China
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3
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Lin W, Wu S, Tang T, Liao Y, Miao W, Shi Z, Wu X. Tuning metal atom doped interface of electrospinning nanowires to toward fast bioelectrocatalysis. Bioelectrochemistry 2024; 157:108664. [PMID: 38330529 DOI: 10.1016/j.bioelechem.2024.108664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/30/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
Metal doping plays a key role in overcoming inefficient extracellular electron transfer between electrode interface and electricity-producing microorganisms. However, it is unknown whether different metals play distinctive roles in the doping process. Herein, three different metal ions (Fe, Ni and Cu) are added to the spinning precursor to obtain the corresponding electrospinning metal doped carbon nanofibers. It is found that the maximum output power of iron doped carbon nanofiber anode is 641.96 mW m-2, which is better than that of nickel doped carbon nanofiber (411.26 mW m-2) and copper doped carbon nanofiber (336.01 mW m-2), as well as 7.62 times higher than that of CNF. The results proved that due to the various number and types of active sites formed, as well as the distinction in surface morphology and structure, the electronegativity of each material is different. The different bio-abiotic interface could affect the direct contact between the anode interface and the extracellular protein of electricity producing microorganisms, which leading to a significant gap in the improvement of bioelectrocatalytic performance of different metal anode materials. This work provides a synthetic idea for designing highly efficient anode materials with directional metal modification and interface regulation.
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Affiliation(s)
- Wen Lin
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China
| | - Shuang Wu
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China
| | - Tianyu Tang
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China
| | - Yongquan Liao
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China
| | - Wenting Miao
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China
| | - Zhuanzhuan Shi
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China.
| | - Xiaoshuai Wu
- Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215011, PR China.
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4
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Lin K, Sun X, Dirnberger F, Li Y, Qu J, Wen P, Sofer Z, Söll A, Winnerl S, Helm M, Zhou S, Dan Y, Prucnal S. Strong Exciton-Phonon Coupling as a Fingerprint of Magnetic Ordering in van der Waals Layered CrSBr. ACS NANO 2024; 18:2898-2905. [PMID: 38240736 PMCID: PMC10832030 DOI: 10.1021/acsnano.3c07236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/31/2024]
Abstract
The layered, air-stable van der Waals antiferromagnetic compound CrSBr exhibits pronounced coupling among its optical, electronic, and magnetic properties. As an example, exciton dynamics can be significantly influenced by lattice vibrations through exciton-phonon coupling. Using low-temperature photoluminescence spectroscopy, we demonstrate the effective coupling between excitons and phonons in nanometer-thick CrSBr. By careful analysis, we identify that the satellite peaks predominantly arise from the interaction between the exciton and an optical phonon with a frequency of 118 cm-1 (∼14.6 meV) due to the out-of-plane vibration of Br atoms. Power-dependent and temperature-dependent photoluminescence measurements support exciton-phonon coupling and indicate a coupling between magnetic and optical properties, suggesting the possibility of carrier localization in the material. The presence of strong coupling between the exciton and the lattice may have important implications for the design of light-matter interactions in magnetic semiconductors and provide insights into the exciton dynamics in CrSBr. This highlights the potential for exploiting exciton-phonon coupling to control the optical properties of layered antiferromagnetic materials.
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Affiliation(s)
- Kaiman Lin
- University
of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai
Jiao Tong University, 20024 Shanghai, People’s Republic of China
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Xiaoxiao Sun
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Florian Dirnberger
- Institute
of Applied Physics and Würzburg-Dresden Cluster of Excellence
ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
| | - Yi Li
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Technische
Universität Dresden, 01062 Dresden, Germany
| | - Jiang Qu
- Leibniz
Institute for Solid State and Materials Research Dresden (IFW Dresden), Helmholtzstraße 20, 01069 Dresden, Germany
| | - Peiting Wen
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Technische
Universität Dresden, 01062 Dresden, Germany
| | - Zdenek Sofer
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic
| | - Aljoscha Söll
- Department
of Inorganic Chemistry, University of Chemistry
and Technology Prague, Technická 5, 16628 Prague 6, Czech Republic
| | - Stephan Winnerl
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Manfred Helm
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Technische
Universität Dresden, 01062 Dresden, Germany
| | - Shengqiang Zhou
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Yaping Dan
- University
of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai
Jiao Tong University, 20024 Shanghai, People’s Republic of China
| | - Slawomir Prucnal
- Institute
of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
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5
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Chan YH, Haber JB, Naik MH, Neaton JB, Qiu DY, da Jornada FH, Louie SG. Exciton Lifetime and Optical Line Width Profile via Exciton-Phonon Interactions: Theory and First-Principles Calculations for Monolayer MoS 2. NANO LETTERS 2023; 23:3971-3977. [PMID: 37071728 DOI: 10.1021/acs.nanolett.3c00732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Exciton dynamics dictates the evolution of photoexcited carriers in photovoltaic and optoelectronic devices. However, interpreting their experimental signatures is a challenging theoretical problem due to the presence of both electron-phonon and many-electron interactions. We develop and apply here a first-principles approach to exciton dynamics resulting from exciton-phonon coupling in monolayer MoS2 and reveal the highly selective nature of exciton-phonon coupling due to the internal spin structure of excitons, which leads to a surprisingly long lifetime of the lowest-energy bright A exciton. Moreover, we show that optical absorption processes rigorously require a second-order perturbation theory approach, with photon and phonon treated on an equal footing, as proposed by Toyozawa and Hopfield. Such a treatment, thus far neglected in first-principles studies, gives rise to off-diagonal exciton-phonon self-energy, which is critical for the description of dephasing mechanisms and yields exciton line widths in excellent agreement with experiment.
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Affiliation(s)
- Yang-Hao Chan
- Institute of Atomic and Molecular Sciences, Academia Sinica, and Physics Division, National Center of Theoretical Physics, Taipei 10617, Taiwan
- Department of Physics, University of California, Berkeley, California 94720-7300, United States
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jonah B Haber
- Department of Physics, University of California, Berkeley, California 94720-7300, United States
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Mit H Naik
- Department of Physics, University of California, Berkeley, California 94720-7300, United States
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jeffrey B Neaton
- Department of Physics, University of California, Berkeley, California 94720-7300, United States
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Kavli Energy NanoSciences Institute at Berkeley, University of California, Berkeley, California 94720, United States
| | - Diana Y Qiu
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520, United States
| | - Felipe H da Jornada
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Steven G Louie
- Department of Physics, University of California, Berkeley, California 94720-7300, United States
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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6
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Torun E, Paleari F, Milošević MV, Wirtz L, Sevik C. Intrinsic Control of Interlayer Exciton Generation in Van der Waals Materials via Janus Layers. NANO LETTERS 2023; 23:3159-3166. [PMID: 37037187 DOI: 10.1021/acs.nanolett.2c04724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
We demonstrate the possibility of engineering the optical properties of transition metal dichalcogenide heterobilayers when one of the constitutive layers has a Janus structure. We investigate different MoS2@Janus layer combinations using first-principles methods including excitons and exciton-phonon coupling. The direction of the intrinsic electric field from the Janus layer modifies the electronic band alignments and, consequently, the energy separation between dark interlayer exciton states and bright in-plane excitons. We find that in-plane lattice vibrations strongly couple the two states, so that exciton-phonon scattering may be a viable generation mechanism for interlayer excitons upon light absorption. In particular, in the case of MoS2@WSSe, the energy separation of the low-lying interlayer exciton from the in-plane exciton is resonant with the transverse optical phonon modes (40 meV). We thus identify this heterobilayer as a prime candidate for efficient generation of charge-separated electron-hole pairs.
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Affiliation(s)
- Engin Torun
- Department of Physics and Materials Science, University of Luxembourg, 162a avenue de la Faïencerie, Luxembourg L-1511, Luxembourg
| | | | - Milorad V Milošević
- Department of Physics & NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp B-2020, Belgium
- Instituto de Fisica, Universidade Federal de Mato Grosso, Cuiaba, Mato Grosso 78060-900, Brazil
| | - Ludger Wirtz
- Department of Physics and Materials Science, University of Luxembourg, 162a avenue de la Faïencerie, Luxembourg L-1511, Luxembourg
| | - Cem Sevik
- Department of Physics & NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, Antwerp B-2020, Belgium
- Department of Mechanical Engineering, Faculty of Engineering, Eskisehir Technical University, Eskisehir 26555, Turkey
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7
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Yang C, Guo F, Wang S, Chen W, Zhang Y, Wang N, Li Z, Wang J. Admirable stability achieved by ns 2 ions Co-doping for all-inorganic metal halides towards optical anti-counterfeiting. RSC Adv 2023; 13:10884-10892. [PMID: 37033439 PMCID: PMC10074776 DOI: 10.1039/d3ra00351e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 03/23/2023] [Indexed: 04/11/2023] Open
Abstract
Optical materials play a momentous role in anti-counterfeiting field, such as authentication, currency and security. The development of tunable optical properties and optical responses to a range of external stimuli is quite imperative for the growing demand of optical anti-counterfeiting technology. Metal halide perovskites have attracted much attention of researchers due to their excellent optical properties. In addition, co-doping methods have been gradually applied to the research of metal halide perovskites, by which more abundant luminescence phenomena can be introduced into the host perovskite. Herein, the ns2 ions of bismuth (Bi3+) and antimony (Sb3+) ions co-doped zero-dimensional Cs2SnCl6 metal halide with an excitation-wavelength-dependent emission phenomenon is synthesized as an efficient multimodal luminescent material, the luminescence of which is tunable and covers a wide region of color. What's more, a dynamic dual-emission phenomenon is captured when the excitation wavelength changes from 320 nm to 420 nm for Cs2SnCl6:Bi0.08Sb0.12 crystals. Moreover, the Bi3+ and Sb3+ doped metal halide material shows great enhancement in solvent resistance and thermal stability compared to the pristine Cs2SnCl6. The admirable stability and distinguishable photoluminescence (PL) phenomenon of this all-inorganic metal halide has great potential to be applied in optical anti-counterfeiting technology. Furthermore, the co-doping method can accelerate the discovery of new luminescence phenomena in original metal halide perovskites.
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Affiliation(s)
- Chuang Yang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Fengwan Guo
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
- Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices, Hubei University Wuhan 430062 P. R. China
| | - Shanping Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Wenwen Chen
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Yu Zhang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Nan Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Zhuozhen Li
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
| | - Juan Wang
- Collaborative Innovation Center for Advanced Organic Chemical Materials, Co-constructed by the Province and Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University Wuhan 430062 P. R. China
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei University Wuhan 43006 P. R. China
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8
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Chen X, Reichardt S, Lin ML, Leng YC, Lu Y, Wu H, Mei R, Wirtz L, Zhang X, Ferrari AC, Tan PH. Control of Raman Scattering Quantum Interference Pathways in Graphene. ACS NANO 2023; 17:5956-5962. [PMID: 36897053 PMCID: PMC10062028 DOI: 10.1021/acsnano.3c00180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 02/24/2023] [Indexed: 06/18/2023]
Abstract
Graphene is an ideal platform to study the coherence of quantum interference pathways by tuning doping or laser excitation energy. The latter produces a Raman excitation profile that provides direct insight into the lifetimes of intermediate electronic excitations and, therefore, on quantum interference, which has so far remained elusive. Here, we control the Raman scattering pathways by tuning the laser excitation energy in graphene doped up to 1.05 eV. The Raman excitation profile of the G mode indicates its position and full width at half-maximum are linearly dependent on doping. Doping-enhanced electron-electron interactions dominate the lifetimes of Raman scattering pathways and reduce Raman interference. This will provide guidance for engineering quantum pathways for doped graphene, nanotubes, and topological insulators.
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Affiliation(s)
- Xue Chen
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center
of Materials Science and Optoelectronics Engineering and CAS Center
of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sven Reichardt
- Department
of Physics and Materials Science, University
of Luxembourg, Luxembourg 1511, Luxembourg
| | - Miao-Ling Lin
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Yu-Chen Leng
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Yan Lu
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Heng Wu
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center
of Materials Science and Optoelectronics Engineering and CAS Center
of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Mei
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center
of Materials Science and Optoelectronics Engineering and CAS Center
of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ludger Wirtz
- Department
of Physics and Materials Science, University
of Luxembourg, Luxembourg 1511, Luxembourg
| | - Xin Zhang
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center
of Materials Science and Optoelectronics Engineering and CAS Center
of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Andrea C. Ferrari
- Cambridge
Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
| | - Ping-Heng Tan
- State
Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
- Center
of Materials Science and Optoelectronics Engineering and CAS Center
of Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China
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9
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Prayogi S, Asih R, Priyanto B, Baqiya MA, Naradipa MA, Cahyono Y, Darminto, Rusydi A. Observation of resonant exciton and correlated plasmon yielding correlated plexciton in amorphous silicon with various hydrogen content. Sci Rep 2022; 12:21497. [PMID: 36513694 DOI: 10.1038/s41598-022-24713-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 11/18/2022] [Indexed: 12/15/2022] Open
Abstract
Hydrogenated amorphous silicon (a-Si: H) has received great attention for rich fundamental physics and potentially inexpensive solar cells. Here, we observe new resonant excitons and correlated plasmons tunable via hydrogen content in a-Si: H films on Indium Tin Oxide (ITO) substrate. Spectroscopic ellipsometry supported with High Resolution-Transmission Electron Microscopy (HR-TEM) is used to probe optical properties and the density of electronic states in the various crystallinity from nano-size crystals to amorphous a-Si: H films. The observed optical and electronic structures are analyzed by the second derivative with analytic critical-point line shapes. The complex dielectric function shows good agreement with microscopic calculations for the energy shift and the broadening inter-band transitions based on the electron-hole interaction. Interestingly, we observe an unusual spectral weight transfer over a broad energy range revealing electronic correlations that cause a drastic change in the charge carrier density and determine the photovoltaic performance. Furthermore, the interplay of resonant excitons and correlated plasmons is discussed in term of a correlated plexciton. Our result shows the important role of hydrogen in determining the coupling of excitons and plasmons in a-Si: H film for photovoltaic devices.
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Affiliation(s)
- Soni Prayogi
- Department of Physics, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia.,Department of Electrical Engineering, Pertamina University, Jakarta, 12220, Indonesia
| | - Retno Asih
- Department of Physics, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Budhi Priyanto
- Department of Physics, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Malik A Baqiya
- Department of Physics, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Muhammad A Naradipa
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
| | - Yoyok Cahyono
- Department of Physics, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia
| | - Darminto
- Department of Physics, Institut Teknologi Sepuluh Nopember, Surabaya, 60111, Indonesia.
| | - Andrivo Rusydi
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore. .,Singapore Synchrotron Light Source, 5 Research Link, Singapore, 117603, Singapore.
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10
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Barati F, Arp TB, Su S, Lake RK, Aji V, van Grondelle R, Rudner MS, Song JCW, Gabor NM. Vibronic Exciton-Phonon States in Stack-Engineered van der Waals Heterojunction Photodiodes. NANO LETTERS 2022; 22:5751-5758. [PMID: 35787025 PMCID: PMC9335870 DOI: 10.1021/acs.nanolett.2c00944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Stack engineering, an atomic-scale metamaterial strategy, enables the design of optical and electronic properties in van der Waals heterostructure devices. Here we reveal the optoelectronic effects of stacking-induced strong coupling between atomic motion and interlayer excitons in WSe2/MoSe2 heterojunction photodiodes. To do so, we introduce the photocurrent spectroscopy of a stack-engineered photodiode as a sensitive technique for probing interlayer excitons, enabling access to vibronic states typically found only in molecule-like systems. The vibronic states in our stack are manifest as a palisade of pronounced periodic sidebands in the photocurrent spectrum in frequency windows close to the interlayer exciton resonances and can be shifted "on demand" through the application of a perpendicular electric field via a source-drain bias voltage. The observation of multiple well-resolved sidebands as well as their ability to be shifted by applied voltages vividly demonstrates the emergence of interlayer exciton vibronic structure in a stack-engineered optoelectronic device.
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Affiliation(s)
- Fatemeh Barati
- Laboratory
of Quantum Materials Optoelectronics, Department of Physics and Astronomy, and Laboratory for Terahertz
and Terascale Electronics (LATTE), Department of Electrical and Computer
Engineering, University of California—Riverside, Riverside, California 92521, United States
| | - Trevor B. Arp
- Laboratory
of Quantum Materials Optoelectronics, Department of Physics and Astronomy, and Laboratory for Terahertz
and Terascale Electronics (LATTE), Department of Electrical and Computer
Engineering, University of California—Riverside, Riverside, California 92521, United States
| | - Shanshan Su
- Laboratory
of Quantum Materials Optoelectronics, Department of Physics and Astronomy, and Laboratory for Terahertz
and Terascale Electronics (LATTE), Department of Electrical and Computer
Engineering, University of California—Riverside, Riverside, California 92521, United States
| | - Roger K. Lake
- Laboratory
of Quantum Materials Optoelectronics, Department of Physics and Astronomy, and Laboratory for Terahertz
and Terascale Electronics (LATTE), Department of Electrical and Computer
Engineering, University of California—Riverside, Riverside, California 92521, United States
| | - Vivek Aji
- Laboratory
of Quantum Materials Optoelectronics, Department of Physics and Astronomy, and Laboratory for Terahertz
and Terascale Electronics (LATTE), Department of Electrical and Computer
Engineering, University of California—Riverside, Riverside, California 92521, United States
| | - Rienk van Grondelle
- Department
of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
- Canadian
Institute for Advanced Research, MaRS Centre
West Tower, 661 University
Avenue, Toronto, Ontario ON M5G 1M1, Canada
| | - Mark S. Rudner
- Department
of Physics, University of Washington, Seattle, Washington 98195, United States
- Niels
Bohr Institute, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Justin C. W. Song
- Division
of Physics and Applied Physics, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Nathaniel M. Gabor
- Laboratory
of Quantum Materials Optoelectronics, Department of Physics and Astronomy, and Laboratory for Terahertz
and Terascale Electronics (LATTE), Department of Electrical and Computer
Engineering, University of California—Riverside, Riverside, California 92521, United States
- Canadian
Institute for Advanced Research, MaRS Centre
West Tower, 661 University
Avenue, Toronto, Ontario ON M5G 1M1, Canada
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11
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Lloyd LT, Wood RE, Mujid F, Sohoni S, Ji KL, Ting PC, Higgins JS, Park J, Engel GS. Sub-10 fs Intervalley Exciton Coupling in Monolayer MoS 2 Revealed by Helicity-Resolved Two-Dimensional Electronic Spectroscopy. ACS NANO 2021; 15:10253-10263. [PMID: 34096707 DOI: 10.1021/acsnano.1c02381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The valley pseudospin at the K and K' high-symmetry points in monolayer transition metal dichalcogenides (TMDs) has potential as an optically addressable degree of freedom in next-generation optoelectronics. However, intervalley scattering and relaxation of charge carriers leads to valley depolarization and limits practical applications. In addition, enhanced Coulomb interactions lead to pronounced excitonic effects that dominate the optical response and initial valley depolarization dynamics but complicate the interpretation of ultrafast spectroscopic experiments at short time delays. Employing broadband helicity-resolved two-dimensional electronic spectroscopy (2DES), we observe ultrafast (∼10 fs) intervalley coupling between all A and B valley exciton states that results in a complete breakdown of the valley index in large-area monolayer MoS2 films. These couplings and subsequent dynamics exhibit minimal excitation fluence or temperature dependence and are robust toward changes in sample grain size and inherent strain. Our observations strongly suggest that this direct intervalley coupling on the time scale of optical excitation is an inherent property of large-area MoS2 distinct from dynamic carrier or exciton scattering, phonon-driven processes, and multiexciton effects. This ultrafast intervalley coupling poses a fundamental challenge for exciton-based valleytronics in monolayer TMDs and must be overcome to fully realize large-area valleytronic devices.
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Affiliation(s)
- Lawson T Lloyd
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Ryan E Wood
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Fauzia Mujid
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Siddhartha Sohoni
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Karen L Ji
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Po-Chieh Ting
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Jacob S Higgins
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
| | - Jiwoong Park
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Pritzker School of Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States
| | - Gregory S Engel
- Department of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- James Franck Institute, The University of Chicago, Chicago, Illinois 60637, United States
- Institute for Biophysical Dynamics, The University of Chicago, Chicago, Illinois 60637, United States
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12
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Huang TA, Zacharias M, Lewis DK, Giustino F, Sharifzadeh S. Exciton-Phonon Interactions in Monolayer Germanium Selenide from First Principles. J Phys Chem Lett 2021; 12:3802-3808. [PMID: 33848154 DOI: 10.1021/acs.jpclett.1c00264] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We investigate from first principles exciton-phonon interactions in monolayer germanium selenide, a direct gap two-dimensional semiconductor. By combining the Bethe-Salpeter approach and the special displacement method, we explore the phonon-induced renormalization of the exciton wave functions, excitation energies, and oscillator strengths. We determine a renormalization of the optical gap of 0.1 eV at room temperature, which results from the coupling of the exciton with both acoustic and optical phonons, with the strongest coupling to optical phonons at ∼100 cm-1. We also find that the exciton-phonon interaction is similar between monolayer and bulk GeSe. Overall, we demonstrate that the combination of many-body perturbation theory and special displacements offers a new route to investigate electron-phonon couplings in excitonic spectra, the resulting band gap renormalization, and the nature of phonons that couple to the exciton.
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Affiliation(s)
- Tianlun Allan Huang
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Marios Zacharias
- Department of Mechanical and Materials Science Engineering, Cyprus University of Technology, P.O. Box 50329, 3603 Limassol, Cyprus
| | - D Kirk Lewis
- Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Feliciano Giustino
- Oden Institute for Computational Engineering and Sciences, The University of Texas at Austin, Austin, Texas 78712, United States
- Department of Physics, The University of Texas at Austin, Austin, Texas78712, United States
| | - Sahar Sharifzadeh
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
- Department of Electrical and Computer Engineering, Boston University, Boston, Massachusetts 02215, United States
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