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Wang X, Niu G, Jiang J, Sui L, Zeng X, Liu X, Zhang Y, Wu G, Yuan K, Yang X. Modulating Carrier Dynamics in PdSe 2: The Role of Pressure in Electronic and Phononic Interactions. NANO LETTERS 2024; 24:9058-9064. [PMID: 39007901 DOI: 10.1021/acs.nanolett.4c02300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
PdSe2 is a puckered transition metal dichalcogenide that has been reported to undergo a two-dimensional to three-dimensional structural transition under pressure. Here, we investigated the electronic and phononic evolution of PdSe2 under high pressure using pump-probe spectroscopy. We observed the electronic intraband and interband transitions occurring in the d orbitals of Pd, revealing the disappearance of the Jahn-Teller effect under high pressure. Furthermore, we found that the decay rates of interband recombination and intraband relaxation lifetimes change at 3 and 7 GPa, respectively. First-principles calculations suggest that the bandgap closure slows the decay rate of interband recombination after 3 GPa, while the saturation of phonon-phonon scattering is the main reason for the relatively constant intraband relaxation lifetime. Our work provides a novel perspective for understanding the evolution of the electron and modulation of the carrier dynamics by phonons under pressure.
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Affiliation(s)
- Xiaowei Wang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University of the Chinese Academy of Sciences, Beijing 100039, China
| | - Guangming Niu
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- Marine Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Jutao Jiang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- University of the Chinese Academy of Sciences, Beijing 100039, China
| | - Laizhi Sui
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Xiangyu Zeng
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
| | - Xin Liu
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- Science College, Dalian Maritime University, Dalian 116026, China
| | - Yutong Zhang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Guorong Wu
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Kaijun Yuan
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Xueming Yang
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
- Department of Chemistry, College of Science, Southern University of Science and Technology, Shenzhen 518055, China
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2
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Wu M, Lv X, Zhao W, Liu S, Dan Y, Fang Y, Huang Y, Cui T. Structural phase transition and potential superconductivity initiated by pressure-driven in 1 T-CrSe 2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:425401. [PMID: 38848728 DOI: 10.1088/1361-648x/ad5597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 06/07/2024] [Indexed: 06/09/2024]
Abstract
The exploration of the superconducting properties of antiferromagnetic parent compounds containing transition metals under pressure provides a unique idea for finding and designing superconducting materials with better performance. In this paper, the close relationship between the possible superconductivity and structure phase transition of the typical van der Waals layered material 1T-CrSe2induced by pressure is studied by means of electrical transport and x-ray diffraction for the first time. We introduce the possibility of pressure-induced superconductivity at 20 GPa, with a criticalTcof approximately at 4 K. The superconductivity persists up to the highest measured pressure of 70 GPa, with a maximumTc∼ 5 K at 24 GPa. We observed a structure phase transition fromP-3m1 toC2/mspace group in the range of 9.4-11.7 GPa. The results show that the structural phase transition leads to the metallization of 1T-CrSe2and the further pressure effect makes the superconductivity appear in the new structure. The material undergoes a transition from a two-dimensional layered structure to a three-dimensional structure under pressure. This is the first time that possible superconductivity has been observed in 1T-CrSe2.
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Affiliation(s)
- Ming Wu
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Xindeng Lv
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Wendi Zhao
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Sirui Liu
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Yaqian Dan
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Yuqiang Fang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
| | - Yanping Huang
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
| | - Tian Cui
- Institute of High Pressure Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
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3
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Chen H, Kuklin A, Xiao J, Al-Hartomy OA, Al-Ghamdi A, Wageh S, Zhang Y, Ågren H, Gao L, Zhang H. Direct Observation of Photon Induced Giant Band Renormalization in 2D PdSe 2 Dichalcogenide by Transient Absorption Spectroscopy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302760. [PMID: 37469206 DOI: 10.1002/smll.202302760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 06/18/2023] [Indexed: 07/21/2023]
Abstract
Insight into fundamental light-matter interaction as well as underlying photo-physical processes is crucial for the development of novel optoelectronic devices. Palladium diselenide (PdSe2 ), an important representative of emerging 2D noble metal dichalcogenides, has gain considerable attention owing to its unique optical, physical, and chemical properties. In this study, 2D PdSe2 nanosheets (NSs) are prepared using the liquid-phase exfoliation method. A broadband carrier relaxation dynamics from visible to near-infrared bands are revealed using a time-resolved transient absorption spectrometer, giving results that indicate band filling and bandgap renormalization (BGR) effects in the 2D PdSe2 NSs. The observed blue-shift of the transient absorption spectra at the primary stage and the subsequent red-shift can be ascribed to this BGR effect. These findings reveal the many-body character of the 2D TMDs material and may hold keys for applications in the field of optoelectronics and ultrafast photonics.
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Affiliation(s)
- Hualong Chen
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Artem Kuklin
- Department of Physics and Astronomy, Uppsala University, Uppsala, SE-75120, Sweden
| | - Jing Xiao
- College of Physics and Electronic Engineering, Taishan University, Taian, 271000, China
| | - Omar A Al-Hartomy
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Ahmed Al-Ghamdi
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Swelm Wageh
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Yule Zhang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Hans Ågren
- Department of Physics and Astronomy, Uppsala University, Uppsala, SE-75120, Sweden
| | - Lingfeng Gao
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Key Laboratory of Organosilicon Material Technology, Hangzhou Normal University, Hangzhou, 311121, China
| | - Han Zhang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
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4
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Li G, Zhang X, Wang Y, Bai Z, Zhao H, He J, He D. Ultrafast transient absorption measurements of photocarrier dynamics in PdSe 2. NANOSCALE 2023; 15:14994-14999. [PMID: 37664909 DOI: 10.1039/d3nr03173j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
We investigate the photocarrier dynamics in bulk PdSe2, a layered transition metal dichalcogenide with a novel pentagonal structure and unique electronic and optical properties. Using femtosecond transient absorption microscopy, we study the behavior of photocarriers in mechanically exfoliated bulk PdSe2 flakes at room temperature. By employing a 400 nm ultrafast laser pulse, electron-hole pairs are generated, and their dynamics are probed using an 800 nm detection pulse. Our findings reveal that the lifetime of photocarriers in bulk PdSe2 is approximately 210 ps. Furthermore, by spatially resolving the differential reflection signal, we determine a photocarrier diffusion coefficient of about 7.3 cm2 s-1. Based on these results, we estimate a diffusion length of around 400 nm and a photocarrier mobility of approximately 300 cm2 V-1 s-1. These results shed light on the ultrafast optoelectronic properties of PdSe2, offer valuable insights into photocarriers in this emerging material, and enable design of high-performance optoelectronic devices based on PdSe2.
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Affiliation(s)
- Guili Li
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
| | - Xiaoxian Zhang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
| | - Yongsheng Wang
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
| | - Zhiying Bai
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
| | - Hui Zhao
- Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas 66045, USA.
| | - Jiaqi He
- College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Dawei He
- Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China.
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5
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Jiang X, Zhang S, Jiang D, Wang Y, Molokeev MS, Wang N, Liu Y, Zhang X, Lin Z. Unexpected giant negative area compressibility in palladium diselenide. Natl Sci Rev 2023; 10:nwad016. [PMID: 37565197 PMCID: PMC10411663 DOI: 10.1093/nsr/nwad016] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 12/04/2022] [Accepted: 12/11/2022] [Indexed: 08/12/2023] Open
Abstract
Negative area compressibility (NAC) is a counterintuitive 'squeeze-expand' behavior in solids that is very rare but attractive due to possible pressure-response applications and coupling with rich physicochemical properties. Herein, NAC behavior is reported in palladium diselenide with a large magnitude and wide pressure range. We discover that, apart from the rigid flattening of layers that has been generally recognized, the unexpected giant NAC effect in PdSe2 largely comes from anomalous elongation of intralayer chemical bonds. Both structural variations are driven by intralayer-to-interlayer charge transfer with enhanced interlayer interactions under pressure. Our work updates the mechanical understanding of this anomaly and establishes a new guideline to explore novel compression-induced properties.
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Affiliation(s)
- Xingxing Jiang
- New Functional Crystals Group, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shengzi Zhang
- New Functional Crystals Group, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dequan Jiang
- Center for High Pressure Science & Technology Advanced Research, Beijing 100094, China
| | - Yonggang Wang
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Maxim S Molokeev
- Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk 660036, Russia
- Department of Physics, Far Eastern State Transport University, Khabarovsk 680021, Russia
- International Research Center of Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk 660041, Russia
| | - Naizheng Wang
- New Functional Crystals Group, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Youquan Liu
- New Functional Crystals Group, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingyu Zhang
- New Functional Crystals Group, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zheshuai Lin
- New Functional Crystals Group, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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6
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Ryu JH, Kim JG, Kim B, Kim K, Kim S, Park JH, Park BG, Kim Y, Ko KT, Lee K. Direct Observation of Orbital Driven Strong Interlayer Coupling in Puckered Two-Dimensional PdSe 2. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106053. [PMID: 35038218 DOI: 10.1002/smll.202106053] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Interlayer coupling between individual unit layers is known to be critical in manipulating the layer-dependent properties of two-dimensional (2D) materials. While recent studies have revealed that several 2D materials with significant degrees of interlayer interaction (such as black phosphorus) show strongly layer-dependent properties, the origin based on the electronic structure is drawing intensive attention along with 2D materials exploration. Here, the direct observation of a highly dispersive single electronic band along the interlayer direction in puckered 2D PdSe2 as an experimental hallmark of strong interlayer couplings is reported. Remarkably large band dispersion along the kz -direction near Fermi level, which is even wider than the in-plane one, is observed by the angle-resolved photoemission spectroscopy measurement. Employing X-ray absorption spectroscopy and density functional theory calculations, it is revealed that the strong interlayer coupling in 2D PdSe2 originates from the unique directional bonding of Pd d orbitals associated with unexpected Pd 4d9 configuration, which consequently plays a decisive role for the strong layer-dependency of the band gap.
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Affiliation(s)
- Jung Hyun Ryu
- Department of Physics, Kunsan National University, Gunsan, 54150, Republic of Korea
| | - Jeong-Gyu Kim
- Max Planck POSTECH/Hsinchu Center for Complex Phase Materials and Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Bongjae Kim
- Department of Physics, Kunsan National University, Gunsan, 54150, Republic of Korea
| | - Kyoo Kim
- Korea Atomic Energy Research Institute (KAERI), Daejeon, 34057, Republic of Korea
| | - Sooran Kim
- Department of Physics Education, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Jae-Hoon Park
- Max Planck POSTECH/Hsinchu Center for Complex Phase Materials and Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Byeong-Gyu Park
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Younghak Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Kyung-Tae Ko
- Korea Basic Science Institute (KBSI), Daejeon, 34133, Republic of Korea
| | - Kimoon Lee
- Department of Physics, Kunsan National University, Gunsan, 54150, Republic of Korea
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7
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Xu S, Wang Y, Li Y. Pentagonal PdX2 (X = S, Se) nanosheets with X vacancies as high-performance electrocatalysts for the hydrogen evolution reaction. Phys Chem Chem Phys 2022; 24:9930-9935. [DOI: 10.1039/d2cp00393g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional transition metal dichalcogenides (TMDs) have emerged as promising catalysts for the hydrogen evolution reaction (HER). However, they typically require the engineering of additional actives sites (e.g. vacancies and dopants)...
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8
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Dong Z, Yu W, Zhang L, Mu H, Xie L, Li J, Zhang Y, Huang L, He X, Wang L, Lin S, Zhang K. Highly Efficient, Ultrabroad PdSe 2 Phototransistors from Visible to Terahertz Driven by Mutiphysical Mechanism. ACS NANO 2021; 15:20403-20413. [PMID: 34780146 DOI: 10.1021/acsnano.1c08756] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The noble transition metal dichalcogenide palladium diselenide (PdSe2) is an ideal candidate material for broad-spectrum photodetection owing to the large bandgap tunability, high mobility, low thermal conductivity, and large Seebeck coefficient. In this study, self-powered ultrabroadband PdSe2 photodetectors from the visible-infrared to terahertz (THz) region driven by a mutiphysical mechanism are reported. In the visible-infrared region, the photogenerated electron-hole pairs in the PdSe2 body are quickly separated by the built-in electric field at the metal-semiconductor interface and achieve a photoresponsivity of 28 A·W-1 at 405 nm and 0.4 A·W-1 at 1850 nm. In the THz region, PdSe2 photodetectors display a room-temperature responsivity of 20 mA·W-1 at 0.10 THz and 5 mA·W-1 at 0.24 THz based on efficient production of hot carriers in an antenna-assisted structure. Owing to the fast response speed of ∼7.5 μs and low noise equivalent power of ∼900 pW·Hz-1/2, high-resolution transmission THz imaging is demonstrated under an ambient environment at room temperature. Our research validates the great potential of PdSe2 for broadband photodetection and provides a possibility for future optoelectronic applications.
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Affiliation(s)
- Zhuo Dong
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
| | - Wenzhi Yu
- Songshan Lake Materials Laboratory, Dongguan 523000, China
| | - Libo Zhang
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
- Department of Optoelectronic Science and Engineering, Donghua University, Shanghai 201620, China
| | - Haoran Mu
- Songshan Lake Materials Laboratory, Dongguan 523000, China
| | - Liu Xie
- CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
- Yangtze Memory Technologies Co., Ltd., Wuhan 430074, China
| | - Jie Li
- CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
| | - Yan Zhang
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China
- CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
| | - Luyi Huang
- CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
| | - Xiaoyue He
- Songshan Lake Materials Laboratory, Dongguan 523000, China
| | - Lin Wang
- State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
| | - Shenghuang Lin
- Songshan Lake Materials Laboratory, Dongguan 523000, China
| | - Kai Zhang
- CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications, i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China
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9
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Huo CF, Wen R, Yan XQ, Li DK, Huang KX, Zhu Y, Cui Q, Xu C, Liu ZB, Tian JG. Thickness-dependent ultrafast charge-carrier dynamics and coherent acoustic phonon oscillations in mechanically exfoliated PdSe 2 flakes. Phys Chem Chem Phys 2021; 23:20666-20674. [PMID: 34515274 DOI: 10.1039/d1cp03202j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, palladium diselenide (PdSe2) has emerged as a promising material with potential applications in electronic and optoelectronic devices due to its intriguing electronic and optical properties. The performance of the device is strongly dependent on the charge-carrier dynamics and the related hot phonon behavior. Here, we investigate the photoexcited-carrier dynamics and coherent acoustic phonon (CAP) oscillations in mechanically exfoliated PdSe2 flakes with a thickness ranging from 10.6 nm to 54 nm using time-resolved non-degenerate pump-probe transient reflection (TR) spectroscopy. The results imply that the CAP frequency is thickness-dependent. Polarization-resolved transient reflection (PRTR) measurements reveal the isotropic charge-carrier relaxation dynamics and the CAP frequency in the 10.6 nm region. In addition, the deformation potential (DP) mechanism dominates the generation of the CAP. Moreover, a sound velocity of 6.78 × 103 m s-1 is extracted from the variation of the oscillation period with the flake thickness and the delay time of the acoustic echo. These results provide insight into the ultrafast optical coherent acoustic phonon and optoelectronic properties of PdSe2 and may open new possibilities for PdSe2 applications in THz-frequency mechanical resonators.
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Affiliation(s)
- Chang-Fu Huo
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China.
| | - Rui Wen
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China.
| | - Xiao-Qing Yan
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China.
| | - De-Kang Li
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China.
| | - Kai-Xuan Huang
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China.
| | - Yizhi Zhu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Qiannan Cui
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Chunxiang Xu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Zhi-Bo Liu
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China. .,Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300071, China.,The collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Jian-Guo Tian
- The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, School of Physics and Teda Applied Physics Institute, Nankai University, Tianjin 300071, China. .,Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300071, China.,The collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
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10
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Zhang KC, Cheng LY, Shen C, Li YF, Liu Y, Zhu Y. Thickness-dependent anisotropic transport of phonons and charges in few-layered PdSe 2. Phys Chem Chem Phys 2021; 23:18869-18884. [PMID: 34612425 DOI: 10.1039/d1cp00992c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
So far, layered PdSe2 has attracted much attention due to its completely tunable band-gap with varying layer numbers, yet the thickness-dependent transporting properties have been rarely studied. We have systematically studied the electronic structures, phonon and charge transport properties, and thermoelectric properties of few-layered (from 1L to 4L) and bulk PdSe2 by first-principles calculations and Boltzmann transport theory. As the thickness increases, the energy levels of band edges relative to 4s of selenium move oppositely due to their different bonding states, leading to the power-law decrease of the band-gap. Meanwhile, the electron effective mass decreases rapidly while the hole effective mass increases significantly compared with those unperturbed. Calculations on elastic constants reveal that both bulk and few-layered PdSe2 are mechanically stable, and the bulk is ductile with a Poisson's ratio of 0.27. The shifts of Raman active modes with respect to the thickness as well as their Gruneisen parameters are analyzed and the underlying physics is discussed. At room temperature, the thermal conductivities of the bulk are 7.7, 10.1 and 0.9 W m-1 K-1 along the a, b and c axes, respectively. It is found that the low-frequency modes (<2.0 THz) contribute about 80% of in-plane thermal conductivities. Due to the enhanced contribution from the ZA mode, the thermal conductivity of few-layered PdSe2 is much larger than that of the bulk. The ZA mode is mainly scattered by itself and the Umklapp scattering dominates in the process as the thickness increases. Calculations on charge transport reveal that the electron mobility increases from 2.5-13.2 (1L) to 121.9-167.8 (4L) cm2 V-1 s-1 with the decreasing anisotropy μb/μa, while the hole mobility remains to be ∼20 cm2 V-1 s-1, which is in good agreement with the experimental results. Calculations on the thermoelectric properties reveal that the ZT value as well as the power factor increases largely as the thickness increases and it gets to be optimum for the triple layer. Interestingly, the transport of electrons and phonons is decoupled along the out-of-plane direction, which makes bulk PdSe2 exhibit good thermoelectric performance along the c axis.
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Affiliation(s)
- Kai-Cheng Zhang
- School of Physical Science and Technology, Bohai University, Jinzhou 121013, China.
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11
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Zhu R, Gao Z, Liang Q, Hu J, Wang JS, Qiu CW, Wee ATS. Observation of Anisotropic Magnetoresistance in Layered Nonmagnetic Semiconducting PdSe 2. ACS APPLIED MATERIALS & INTERFACES 2021; 13:37527-37534. [PMID: 34333972 DOI: 10.1021/acsami.1c10500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Anisotropy in crystals usually has remarkable consequences in two-dimensional (2D) materials, for example, black phosphorus, PdSe2, and SnS, arising from different lattice periodicities along different crystallographic directions. Electrical anisotropy has been successfully demonstrated in 2D materials, but anisotropic magnetoresistance in 2D materials is rarely studied. Herein, we report anisotropic magnetoresistance in layered nonmagnetic semiconducting PdSe2 flakes. Anisotropic magnetoresistance along the two crystalline axes under a perpendicular magnetic field is demonstrated, and the magnetoresistance along the a-axis is apparently different from the magnetoresistance along the b-axis. The magnetoresistance can also be flexibly tuned by applying a gate voltage, leveraging the semiconductor properties of PdSe2. The computed anisotropic electronic density of states and electronic mobility with ab initio density functional calculations support the anisotropic and measured magnetoresistance. Our findings advance the understanding of magnetoresistance in anisotropic transition-metal dichalcogenides and pave the way for potential applications in anisotropic spintronic devices.
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Affiliation(s)
- Rui Zhu
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Zhibin Gao
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Qijie Liang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
- Songshan Lake Materials Laboratory, Songshan Lake Mat Lab, Dongguan 523808, China
| | - Junxiong Hu
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Jian-Sheng Wang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
| | - Cheng-Wei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore
| | - Andrew Thye Shen Wee
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551, Singapore
- Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, Singapore 117546, Singapore
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12
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Wang Y, Ren J. Strain-Driven Switchable Thermal Conductivity in Ferroelastic PdSe 2. ACS APPLIED MATERIALS & INTERFACES 2021; 13:34724-34731. [PMID: 34266241 DOI: 10.1021/acsami.1c07830] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Materials with either high or low lattice thermal conductivity are remarkable for thermal management with applying in high-power electronic, optoelectronic, and thermoelectric devices. The realization of thermal switch between high and low thermal conductivities can greatly promote the ability of thermal energy control. Here, based on first-principles calculations, we propose that ferroelastic PdSe2 can achieve continuous switchable thermal conductivity through strain-driven structural phase transition. Thermal switch we explored mainly stems from soft mechanical properties and strong anharmonicity of the structure after ferroelastic phase transition. We demonstrate that the maximum ratio of thermal switch can reach an order of magnitude, indicating PdSe2 as a promising candidate in thermal devices.
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Affiliation(s)
- Yi Wang
- Center for Phononics and Thermal Energy Science, China-EU Joint Lab on Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China
| | - Jie Ren
- Center for Phononics and Thermal Energy Science, China-EU Joint Lab on Nanophononics, Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China
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13
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Hooda MK, Yadav CS, Samal D. Electronic and topological properties of group-10 transition metal dichalcogenides. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:103001. [PMID: 33570047 DOI: 10.1088/1361-648x/abd0c2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The group 10 transition metal dichalcogenides (TMDs) (MX 2: M = Ni, Pd, Pt; X = S, Se, Te) have attracted much attention in the last few decades because of observation of exotic phases and phenomena such as superconductivity (SC), topological surface states (TSSs), type II Dirac fermions, helical spin texture, Rashba effect, 3D Dirac plasmons, metal-insulator transitions, charge density waves (CDW) etc. In this review, we cover the experimental and theoretical progress on the physical phenomena influenced by the strong electron-electron correlation of the group-10 TMDs from the past to the present. We have especially emphasized on the SC and topological phases in the bulk as well as in atomically thin materials.
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Affiliation(s)
- M K Hooda
- Institute of Physics, Bhubaneswar, Bhubaneswar-751005, India
| | - C S Yadav
- School of Basic Sciences, Indian Institute of Technology Mandi, Mandi-175005 (HP), India
| | - D Samal
- Institute of Physics, Bhubaneswar, Bhubaneswar-751005, India
- Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400085, India
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14
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Giant nonlinear optical activity in two-dimensional palladium diselenide. Nat Commun 2021; 12:1083. [PMID: 33597512 PMCID: PMC7889859 DOI: 10.1038/s41467-021-21267-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 01/15/2021] [Indexed: 11/15/2022] Open
Abstract
Nonlinear optical effects in layered two-dimensional transition metal chalcogenides have been extensively explored recently because of the promising prospect of the nonlinear optical effects for various optoelectronic applications. However, these materials possess sizable bandgaps ranging from visible to ultraviolet region, so the investigation of narrow-bandgap materials remains deficient. Here, we report our comprehensive study on the nonlinear optical processes in palladium diselenide (PdSe2) that has a near-infrared bandgap. Interestingly, this material exhibits a unique thickness-dependent second harmonic generation feature, which is in contrast to other transition metal chalcogenides. Furthermore, the two-photon absorption coefficients of 1–3 layer PdSe2 (β ~ 4.16 × 105, 2.58 × 105, and 1.51 × 105 cm GW−1) are larger by two and three orders of magnitude than that of the conventional two-dimensional materials, and giant modulation depths (αs ~ 32%, 27%, and 24%) were obtained in 1–3 layer PdSe2. Such unique nonlinear optical characteristics make PdSe2 a potential candidate for technological innovations in nonlinear optoelectronic devices. Strong nonlinearities in 2D materials can lead to interesting applications in optoelectronics. Here the authors investigate the optical nonlinearity of palladium diselenide, determine the layer dependent two photon absorption efficiency and the saturable absorption modulation depth.
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15
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Jakhar M, Kumar A. Tunable photocatalytic water splitting and solar-to-hydrogen efficiency in β-PdSe 2 monolayer. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00953b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Direct production of hydrogen from photocatalytic water splitting is a potential solution to overcome global energy crisis.
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Affiliation(s)
- Mukesh Jakhar
- Department of Physics, School of Basic Sciences, Central University of Punjab, Bathinda, 151401, India
| | - Ashok Kumar
- Department of Physics, School of Basic Sciences, Central University of Punjab, Bathinda, 151401, India
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16
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Kempt R, Kuc A, Heine T. Two-Dimensional Noble-Metal Chalcogenides and Phosphochalcogenides. Angew Chem Int Ed Engl 2020; 59:9242-9254. [PMID: 32065703 PMCID: PMC7463173 DOI: 10.1002/anie.201914886] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Indexed: 11/07/2022]
Abstract
Noble-metal chalcogenides, dichalcogenides, and phosphochalcogenides are an emerging class of two-dimensional materials. Quantum confinement (number of layers) and defect engineering enables their properties to be tuned over a broad range, including metal-to-semiconductor transitions, magnetic ordering, and topological surface states. They possess various polytypes, often of similar formation energy, which can be accessed by selective synthesis approaches. They excel in mechanical, optical, and chemical sensing applications, and feature long-term air and moisture stability. In this Minireview, we summarize the recent progress in the field of noble-metal chalcogenides and phosphochalcogenides and highlight the structural complexity and its impact on applications.
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Affiliation(s)
- Roman Kempt
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstrasse 6601069DresdenGermany
| | - Agnieszka Kuc
- Institute of Resource EcologyHelmholtz-Zentrum Dresden-RossendorfPermoserstrasse 1504318LeipzigGermany
| | - Thomas Heine
- Faculty of Chemistry and Food ChemistryTechnische Universität DresdenBergstrasse 6601069DresdenGermany
- Institute of Resource EcologyHelmholtz-Zentrum Dresden-RossendorfPermoserstrasse 1504318LeipzigGermany
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17
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Xie C, Jiang S, Gao Y, Hong M, Pan S, Zhao J, Zhang Y. Giant Thickness-Tunable Bandgap and Robust Air Stability of 2D Palladium Diselenide. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000754. [PMID: 32285616 DOI: 10.1002/smll.202000754] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/11/2020] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
Uncovering the thickness-dependent electronic property and environmental stability for 2D materials are crucial issues for promoting their applications in high-performance electronic and optoelectronic devices. Herein, the extrahigh air stability and giant tunable electronic bandgap of chemical vapor deposition (CVD)-derived few-layer PdSe2 on Au foils, by using scanning tunneling microscope/spectroscopy (STM/STS), are reported. The robust stability of 2D PdSe2 is uncovered by the observation of nearly defect/adsorption-free atomic lattices on long-time air-exposed samples. A one-to-one correspondence between the electronic bandgap (from ≈1.15 to ≈0 eV) and thickness of PdSe2 /Au (from bilayer to bulk) is established. It is also revealed that few-layer semiconducting PdSe2 flakes present zero-gap edges, induced by hybridization of Pd 4d and Se 4p orbitals. This work hereby provides straightforward evidence for the thickness-tunable electronic property and air stability of 2D semiconductors, thus shedding light on their applications in next-generation electronic devices.
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Affiliation(s)
- Chunyu Xie
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Shaolong Jiang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Yinlu Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, China
| | - Min Hong
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Shuangyuan Pan
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, China
| | - Yanfeng Zhang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China
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18
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Lu LS, Chen GH, Cheng HY, Chuu CP, Lu KC, Chen CH, Lu MY, Chuang TH, Wei DH, Chueh WC, Jian WB, Li MY, Chang YM, Li LJ, Chang WH. Layer-Dependent and In-Plane Anisotropic Properties of Low-Temperature Synthesized Few-Layer PdSe 2 Single Crystals. ACS NANO 2020; 14:4963-4972. [PMID: 32233458 DOI: 10.1021/acsnano.0c01139] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Palladium diselenide (PdSe2), a peculiar noble metal dichalcogenide, has emerged as a new two-dimensional material with high predicted carrier mobility and a widely tunable band gap for device applications. The inherent in-plane anisotropy endowed by the pentagonal structure further renders PdSe2 promising for novel electronic, photonic, and thermoelectric applications. However, the direct synthesis of few-layer PdSe2 is still challenging and rarely reported. Here, we demonstrate that few-layer, single-crystal PdSe2 flakes can be synthesized at a relatively low growth temperature (300 °C) on sapphire substrates using low-pressure chemical vapor deposition (CVD). The well-defined rectangular domain shape and precisely determined layer number of the CVD-grown PdSe2 enable us to investigate their layer-dependent and in-plane anisotropic properties. The experimentally determined layer-dependent band gap shrinkage combined with first-principle calculations suggest that the interlayer interaction is weaker in few-layer PdSe2 in comparison with that in bulk crystals. Field-effect transistors based on the CVD-grown PdSe2 also show performances comparable to those based on exfoliated samples. The low-temperature synthesis method reported here provides a feasible approach to fabricate high-quality few-layer PdSe2 for device applications.
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Affiliation(s)
- Li-Syuan Lu
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Guan-Hao Chen
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Hui-Yu Cheng
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chih-Piao Chuu
- Corporate Research, Taiwan Semiconductor Manufacturing Company (TSMC), Hsinchu 30075, Taiwan
| | - Kuan-Cheng Lu
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chia-Hao Chen
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Ming-Yen Lu
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tzu-Hung Chuang
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Der-Hsin Wei
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Wei-Chen Chueh
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Wen-Bin Jian
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Ming-Yang Li
- Corporate Research, Taiwan Semiconductor Manufacturing Company (TSMC), Hsinchu 30075, Taiwan
| | - Yu-Ming Chang
- Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan
| | - Lain-Jong Li
- Corporate Research, Taiwan Semiconductor Manufacturing Company (TSMC), Hsinchu 30075, Taiwan
| | - Wen-Hao Chang
- Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, Taiwan
- Center for Emergent Functional Matter Science (CEFMS), National Chiao Tung University, Hsinchu 30010, Taiwan
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19
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Kempt R, Kuc A, Heine T. Zweidimensionale Edelmetallchalkogenide und ‐phosphochalkogenide. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Roman Kempt
- Fakultät für Chemie und LebensmittelchemieTechnische Universität Dresden Bergstrasse 66 01069 Dresden Deutschland
| | - Agnieszka Kuc
- Institut für RessourcenökologieHelmholtz-Zentrum Dresden-Rossendorf Permoserstrasse 15 04318 Leipzig Deutschland
| | - Thomas Heine
- Fakultät für Chemie und LebensmittelchemieTechnische Universität Dresden Bergstrasse 66 01069 Dresden Deutschland
- Institut für RessourcenökologieHelmholtz-Zentrum Dresden-Rossendorf Permoserstrasse 15 04318 Leipzig Deutschland
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20
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Kuklin AV, Ågren H, Avramov PV. Structural stability of single-layer PdSe 2 with pentagonal puckered morphology and its nanotubes. Phys Chem Chem Phys 2020; 22:8289-8295. [PMID: 32285892 DOI: 10.1039/d0cp00979b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional (2D) materials have gained a lot of attention being a new class of materials with unique properties that could influence future technologies. Concomitant computational design and discovery of new two-dimensional materials have therefore become a significant part of modern materials research. The stability of these predicted materials has emerged as the main issue due to drawbacks of the periodic boundary condition approximation that allow one to pass common criteria of stability. Here, based on first-principle calculations, we demonstrate structural stability and instability of several recently proposed 2D materials with pentagonal morphology including the experimentally exfoliated single-layer PdSe2. It is found that an appropriate orientation of the central Pd sublattice with respect to Se2 dimers effectively compensates all mechanical stress and preserves the planar structure of the PdSe2 nanoclusters, while the flakes of all other materials having pentagonal morphology exhibit non-zero curvature induced by excessive interatomic forces. The relative energies of the PdSe2 monolayer and nanotubes per formula unit also confirm that the planar monolayer is a global energy minimum. Like the monolayer, (n,0) PdSe2 tubes are indirect band gap semiconductors with similar band gaps, while (n,n) tubes reveal indirect-direct band gap transitions following the increase of the tube diameter. Small strain energies of large diameter tubes propose their possible experimental realization for various optoelectronic applications.
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Affiliation(s)
- Artem V Kuklin
- Department of Science and Innovations, Siberian Federal University, 79 Svobodny pr., Krasnoyarsk 660041, Russia. and Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10691 Stockholm, Sweden and Federal Siberian Research Clinical Centre under FMBA of Russia, Krasnoyarsk, 660037, Russia and College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Pavel V Avramov
- Department of Chemistry, College of Natural Sciences, Kyungpook National University, 80 Daehakro, Bukgu, Daegu, 41566, South Korea
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21
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Jiang S, Xie C, Gu Y, Zhang Q, Wu X, Sun Y, Li W, Shi Y, Zhao L, Pan S, Yang P, Huan Y, Xie D, Zhang Q, Liu X, Zou X, Gu L, Zhang Y. Anisotropic Growth and Scanning Tunneling Microscopy Identification of Ultrathin Even-Layered PdSe 2 Ribbons. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1902789. [PMID: 31544354 DOI: 10.1002/smll.201902789] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 08/30/2019] [Indexed: 06/10/2023]
Abstract
Palladium diselenide (PdSe2 ) is an emerging 2D layered material with anisotropic optical/electrical properties, extra-high carrier mobility, excellent air stability, etc. So far, ultrathin PdSe2 is mainly achieved via mechanical exfoliation from its bulk counterpart, and the direct synthesis is still challenging. Herein, the synthesis of ultrathin 2D PdSe2 on conductive Au foil substrates via a facile chemical vapor deposition route is reported. Intriguingly, an anisotropic growth behavior is detected from the evolution of ribboned flakes with large length/width ratios, which is well explained from the orthorhombic symmetry of PdSe2 . A unique even-layered growth mode from 2 to 20 layers is also confirmed by the perfect combination of onsite scanning tunneling microscopy characterizations, through deliberately scratching the flake edge to expose both even and odd layers. This even-layered, ribboned 2D material is expected to serve as a perfect platform for exploring unique physical properties, and for developing high-performance electronic and optoelectronic devices.
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Affiliation(s)
- Shaolong Jiang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Chunyu Xie
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yue Gu
- Shenzhen Geim Graphene Center and Low-Dimensional Materials and Devices Laboratory, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, P. R. China
| | - Qinghua Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xianxin Wu
- Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Yilin Sun
- Institute of Microelectronics, Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing, 100084, P. R. China
| | - Wei Li
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yuping Shi
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Liyun Zhao
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Shuangyuan Pan
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Pengfei Yang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Yahuan Huan
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Dan Xie
- Institute of Microelectronics, Tsinghua National Laboratory for Information Science and Technology (TNList), Tsinghua University, Beijing, 100084, P. R. China
| | - Qing Zhang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
| | - Xinfeng Liu
- Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiaolong Zou
- Shenzhen Geim Graphene Center and Low-Dimensional Materials and Devices Laboratory, Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen, 518055, P. R. China
| | - Lin Gu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanfeng Zhang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China
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22
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Lei W, Cai B, Zhou H, Heymann G, Tang X, Zhang S, Ming X. Ferroelastic lattice rotation and band-gap engineering in quasi 2D layered-structure PdSe 2 under uniaxial stress. NANOSCALE 2019; 11:12317-12325. [PMID: 31214668 DOI: 10.1039/c9nr03101d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Transition metal dichalcogenides (TMDCs) have attracted extensive attention in recent years for their novel physical and chemical properties as well as promising applications in the future. In the present paper, based on first-principles simulations, we focused on the bulk of the TMDC material PdSe2 and provided new insights into its unique structural properties and electronic structures under uniaxial stress. For the first time, we revealed that this orthorhombic PdSe2 is an intrinsic ferroelastic material with stress-driven 90° lattice rotation in the layer stacking direction. Strikingly, the ferroelastic phase transition originated from the bond reconstructions in the unusual square-planar (PdSe4)2- structural units. Specifically, low switching barriers and strong ferroelastic signals rendered room-temperature shape memory accessible. Moreover, the ferroelastic phase transition was accompanied with semiconductor-to-metal-to-semiconductor transitions under uniaxial compressive stress, which could be applied in electronic switching devices. In addition, the band gap was closely associated to the interlayer spacing, which could be engineered by the uniaxial tensile stress. These outstanding stress-engineered properties suggest that orthorhombic PdSe2 is a promising material for potential applications in microelectromechanical and nanoelectronic devices.
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Affiliation(s)
- Wen Lei
- College of Science, Guilin University of Technology, Guilin 541004, China.
| | - Bo Cai
- MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Huanfu Zhou
- Key Lab of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Gunter Heymann
- Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens-University Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Xin Tang
- Key Lab of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China
| | - Shengli Zhang
- MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
| | - Xing Ming
- College of Science, Guilin University of Technology, Guilin 541004, China.
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23
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Chen H, Zhou S, Morgan D, Prakapenka V, Greenberg E, Leinenweber K, Shim SH. The O-O Bonding and Hydrogen Storage in the Pyrite-type PtO 2. Inorg Chem 2019; 58:8300-8307. [PMID: 31194523 DOI: 10.1021/acs.inorgchem.9b00046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have synthesized pyrite-type PtO2 (py-PtO2) at 50-60 GPa and successfully recovered it at 1 bar. The observed O-O stretching vibration in Raman spectra provides direct evidence for inter-oxygen bonding in the structure. We also identified the O-H vibrations in py-PtO2 synthesized from the low-temperature areas, indicating hydrogenation, py-PtO2H x ( x ≤ 1). Diffraction patterns are consistent with a range of degrees of hydrogenation controlled by temperature. We found that py-PtO2 has a high bulk modulus, 314 ± 4 GPa. The chemical behaviors found in py-PtO2 have implications for the hydrogen storage in materials with anion-anion bonding, and the geochemistry of oxygen, hydrogen, and transition metals in the deep planetary interiors.
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Affiliation(s)
- Huawei Chen
- School of Earth and Space Exploration , Arizona State University , Tempe , Arizona 85287-6004 , United States
| | - Shuxiang Zhou
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Dane Morgan
- Department of Materials Science and Engineering , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Vitali Prakapenka
- GeoSoilEnviroCars , University of Chicago , Chicago , Illinois 60439 , United States
| | - Eran Greenberg
- GeoSoilEnviroCars , University of Chicago , Chicago , Illinois 60439 , United States
| | - Kurt Leinenweber
- Eyring Materials Center , Arizona State University , Tempe , Arizona 85287-1604 , United States
| | - Sang-Heon Shim
- School of Earth and Space Exploration , Arizona State University , Tempe , Arizona 85287-6004 , United States
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24
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Liang Q, Wang Q, Zhang Q, Wei J, Lim SX, Zhu R, Hu J, Wei W, Lee C, Sow C, Zhang W, Wee ATS. High-Performance, Room Temperature, Ultra-Broadband Photodetectors Based on Air-Stable PdSe 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1807609. [PMID: 31025440 DOI: 10.1002/adma.201807609] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 03/31/2019] [Indexed: 05/12/2023]
Abstract
Photodetection over a broad spectral range is crucial for optoelectronic applications such as sensing, imaging, and communication. Herein, a high-performance ultra-broadband photodetector based on PdSe2 with unique pentagonal atomic structure is reported. The photodetector responds from visible to mid-infrared range (up to ≈4.05 µm), and operates stably in ambient and at room temperature. It promises improved applications compared to conventional mid-infrared photodetectors. The highest responsivity and external quantum efficiency achieved are 708 A W-1 and 82 700%, respectively, at the wavelength of 1064 nm. Efficient optical absorption beyond 8 µm is observed, indicating that the photodetection range can extend to longer than 4.05 µm. Owing to the low crystalline symmetry of layered PdSe2 , anisotropic properties of the photodetectors are observed. This emerging material shows potential for future infrared optoelectronics and novel devices in which anisotropic properties are desirable.
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Affiliation(s)
- Qijie Liang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
| | - Qixing Wang
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
| | - Qian Zhang
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117574, Singapore
| | - Jingxuan Wei
- Department of Electrical and Computer Engineering, National University of, Singapore, 117583, Singapore
| | - Sharon Xiaodai Lim
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
| | - Rui Zhu
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
| | - Junxiong Hu
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
| | - Wei Wei
- Department of Electrical and Computer Engineering, National University of, Singapore, 117583, Singapore
| | - Chengkuo Lee
- Department of Electrical and Computer Engineering, National University of, Singapore, 117583, Singapore
| | - ChorngHaur Sow
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, Block S14, 6 Science Drive 2, Singapore, 117546, Singapore
| | - Wenjing Zhang
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China
| | - Andrew Thye Shen Wee
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117551, Singapore
- Centre for Advanced 2D Materials, National University of Singapore, Block S14, 6 Science Drive 2, Singapore, 117546, Singapore
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25
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Tian J, Ivanovski VN, Szalda D, Lei H, Wang A, Liu Y, Zhang W, Koteski V, Petrovic C. Fe 0.36(4)Pd 0.64(4)Se 2: Magnetic Spin-Glass Polymorph of FeSe 2 and PdSe 2 Stable at Ambient Pressure. Inorg Chem 2019; 58:3107-3114. [PMID: 30777749 DOI: 10.1021/acs.inorgchem.8b03089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the synthesis and characterization of Fe0.36(4)Pd0.64(4)Se2 with a pyrite-type structure. Fe0.36(4)Pd0.64(4)Se2 was synthesized using ambient pressure flux crystal growth methods even though the space group Pa3 is high-pressure polymorph for both FeSe2 and PdSe2. Combined experimental and theoretical analysis reveal magnetic spin glass state below 23 K in 1000 Oe that stems from random Fe/Pd occupancies on the same atomic site. The frozen-in magnetic randomness contributes significantly to electronic transport. Electronic structure calculations confirm dominant d-electron character of hybridized bands and large density of states near the Fermi level. Flux-grown single crystal alloys in Pd-Fe-Se atomic system therefore open new pathway for exploring different polymorphs in crystal structures and their novel properties.
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Affiliation(s)
- Jianjun Tian
- Condensed Matter Physics and Materials Science Department , Brookhaven National Laboratory , Upton , New York 11973 , United States.,Henan Key Laboratory of Photovoltaic Materials and School of Physics & Electronics , Henan University , Kaifeng 475004 , China
| | - Valentin N Ivanovski
- Vinca Institute of Nuclear Sciences , University of Belgrade , Belgrade 11001 , Serbia
| | - David Szalda
- Department of Natural Sciences , Baruch College, CUNY , New York , New York 10010-5585 , United States
| | - Hechang Lei
- Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices , Renmin University of China , Beijing 100872 , China
| | - Aifeng Wang
- Condensed Matter Physics and Materials Science Department , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Yu Liu
- Condensed Matter Physics and Materials Science Department , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Weifeng Zhang
- Henan Key Laboratory of Photovoltaic Materials and School of Physics & Electronics , Henan University , Kaifeng 475004 , China
| | - Vasil Koteski
- Vinca Institute of Nuclear Sciences , University of Belgrade , Belgrade 11001 , Serbia
| | - Cedomir Petrovic
- Condensed Matter Physics and Materials Science Department , Brookhaven National Laboratory , Upton , New York 11973 , United States
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26
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Long M, Wang Y, Wang P, Zhou X, Xia H, Luo C, Huang S, Zhang G, Yan H, Fan Z, Wu X, Chen X, Lu W, Hu W. Palladium Diselenide Long-Wavelength Infrared Photodetector with High Sensitivity and Stability. ACS NANO 2019; 13:2511-2519. [PMID: 30714726 DOI: 10.1021/acsnano.8b09476] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A long-wavelength infrared photodetector based on two-dimensional materials working at room temperature would have wide applications in many aspects in remote sensing, thermal imaging, biomedical optics, and medical imaging. However, sub-bandgap light detection in graphene and black phosphorus has been a long-standing scientific challenge because of their low photoresponsivity, instability in the air, and high dark current. In this study, we report a highly sensitive, air-stable, and operable long-wavelength infrared photodetector at room temperature based on PdSe2 phototransistors and their heterostructure. A high photoresponsivity of ∼42.1 AW-1 (at 10.6 μm) was demonstrated, which is an order of magnitude higher than the current record of platinum diselenide. Moreover, the dark current and noise power density were suppressed effectively by fabricating a van der Waals heterostructure. This work fundamentally contributes to establishing long-wavelength infrared detection by PdSe2 at the forefront of long-IR two-dimensional-materials-based photonics.
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Affiliation(s)
- Mingsheng Long
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
| | - Yang Wang
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
| | - Peng Wang
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
| | - Xiaohao Zhou
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
| | - Hui Xia
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
| | - Chen Luo
- Shanghai Key Laboratory of Multidimensional Information Processing, Department of Electronic Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Shenyang Huang
- Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) , Fudan University , 220 Han Dan Road , Shanghai 200433 , China
| | - Guowei Zhang
- Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) , Fudan University , 220 Han Dan Road , Shanghai 200433 , China
| | - Hugen Yan
- Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) , Fudan University , 220 Han Dan Road , Shanghai 200433 , China
| | - Zhiyong Fan
- Department of Electronic and Computer Engineering , The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong China SAR
| | - Xing Wu
- Shanghai Key Laboratory of Multidimensional Information Processing, Department of Electronic Engineering , East China Normal University , 500 Dongchuan Road , Shanghai 200241 , China
| | - Xiaoshuang Chen
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
| | - Wei Lu
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
| | - Weida Hu
- State Key Laboratory of Infrared Physics , Shanghai Institute of Technical Physics, Chinese Academy of Sciences , 500 Yu Tian Road , Shanghai 200083 , China
- University of Chinese Academy of Sciences , 19 Yu Quan Road , Beijing 100049 , China
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27
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Physical Properties and Photovoltaic Application of Semiconducting Pd₂Se₃ Monolayer. NANOMATERIALS 2018; 8:nano8100832. [PMID: 30322195 PMCID: PMC6215269 DOI: 10.3390/nano8100832] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/04/2018] [Accepted: 10/13/2018] [Indexed: 11/17/2022]
Abstract
Palladium selenides have attracted considerable attention because of their intriguing properties and wide applications. Motivated by the successful synthesis of Pd₂Se₃ monolayer (Lin et al., Phys. Rev. Lett., 2017, 119, 016101), here we systematically study its physical properties and device applications using state-of-the-art first principles calculations. We demonstrate that the Pd₂Se₃ monolayer has a desirable quasi-direct band gap (1.39 eV) for light absorption, a high electron mobility (140.4 cm²V-1s-1) and strong optical absorption (~10⁵ cm-1) in the visible solar spectrum, showing a great potential for absorber material in ultrathin photovoltaic devices. Furthermore, its bandgap can be tuned by applying biaxial strain, changing from indirect to direct. Equally important, replacing Se with S results in a stable Pd₂S₃ monolayer that can form a type-II heterostructure with the Pd₂Se₃ monolayer by vertically stacking them together. The power conversion efficiency (PCE) of the heterostructure-based solar cell reaches 20%, higher than that of MoS₂/MoSe₂ solar cell. Our study would motivate experimental efforts in achieving Pd₂Se₃ monolayer-based heterostructures for new efficient photovoltaic devices.
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28
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Selb E, Tribus M, Heymann G. Single-crystal structure of pyrite-type HP-Pd0.84(1)Se2 prepared by high-pressure/ high-temperature synthesis. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2018. [DOI: 10.1515/znb-2018-0180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
At ambient conditions, PdSe2 dichalcogenides crystallize in the layered PdS2-type structure. If pressure is applied, the coordination number of palladium atoms increases and the three-dimensional pyrite-type structure with octahedral (PdSe6)4− coordination geometry is observed. For the first time, single crystals of a pyrite-type PdSe2 modification could be obtained and characterized, which were grown by multianvil high-pressure/high-temperature synthesis at 7.5 GPa and 1023 K. The crystals show the expected pyrite-type space group Pa3̅ (no. 205) and refinement results of a=613.26(3) pm, R1=0.0233, and wR2=0.0247 (all data) were received for HP-Pd0.84(1)Se2. The single-crystal data revealed significant defect formation on the palladium site with 16% vacancies, which is in line with the orthorhombic PdX
2-type high-pressure polymorphs HP-Pd0.94(1)S2 and HP-Pd0.88(1)Se2. The tendency of vacancy formation on the palladium site could also be verified by EDX measurements.
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Affiliation(s)
- Elisabeth Selb
- Institut für Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universität Innsbruck , Innrain 80–82 , A-6020 Innsbruck , Austria
| | - Martina Tribus
- Institut für Mineralogie und Petrographie, Leopold-Franzens-Universität Innsbruck , Innrain 52 , A-6020 Innsbruck , Austria
| | - Gunter Heymann
- Institut für Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universität Innsbruck , Innrain 80–82 , A-6020 Innsbruck , Austria , Fax: +43(0)512-507 57099
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29
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Nguyen GD, Liang L, Zou Q, Fu M, Oyedele AD, Sumpter BG, Liu Z, Gai Z, Xiao K, Li AP. 3D Imaging and Manipulation of Subsurface Selenium Vacancies in PdSe_{2}. PHYSICAL REVIEW LETTERS 2018; 121:086101. [PMID: 30192587 DOI: 10.1103/physrevlett.121.086101] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Indexed: 05/12/2023]
Abstract
Two-dimensional materials such as layered transition-metal dichalcogenides (TMDs) are ideal platforms for studying defect behaviors, an essential step towards defect engineering for novel material functions. Here, we image the 3D lattice locations of selenium-vacancy V_{Se} defects and manipulate them using a scanning tunneling microscope (STM) near the surface of PdSe_{2}, a recently discovered pentagonal layered TMD. The V_{Se} show a characterisitc charging ring in a spatially resolved conductance map, based on which we can determine its subsurface lattice location precisely. Using the STM tip, not only can we reversibly switch the defect states between charge neutral and charge negative, but also trigger migrations of V_{Se} defects. This allows a demonstration of direct "writing" and "erasing" of atomic defects and tracing the diffusion pathways. First-principles calculations reveal a small diffusion barrier of V_{Se} in PdSe_{2}, which is much lower than S vacancy in MoS_{2} or an O vacancy in TiO_{2}. This finding opens an opportunity of defect engineering in PdSe_{2} for such as controlled phase transformations and resistive-switching memory device application.
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Affiliation(s)
- Giang D Nguyen
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Liangbo Liang
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Qiang Zou
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Mingming Fu
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Akinola D Oyedele
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Bobby G Sumpter
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Oak Ridge National Laboratory, Computational Sciences and Engineering Division, Oak Ridge, Tennessee 37831, USA
| | - Zheng Liu
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Zheng Gai
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Kai Xiao
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - An-Ping Li
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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30
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Sun M, Chou JP, Shi L, Gao J, Hu A, Tang W, Zhang G. Few-Layer PdSe 2 Sheets: Promising Thermoelectric Materials Driven by High Valley Convergence. ACS OMEGA 2018; 3:5971-5979. [PMID: 31458788 PMCID: PMC6644379 DOI: 10.1021/acsomega.8b00485] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/24/2018] [Indexed: 05/23/2023]
Abstract
Herein, we report a comprehensive study on the structural and electronic properties of bulk, monolayer, and multilayer PdSe2 sheets. First, we present a benchmark study on the structural properties of bulk PdSe2 by using 13 commonly used density functional theory (DFT) functionals. Unexpectedly, the most commonly used van der Waals (vdW)-correction methods, including DFT-D2, optB88, and vdW-DF2, fail to provide accurate predictions of lattice parameters compared to experimental data (relative error > 15%). On the other hand, the PBE-TS series functionals provide significantly improved prediction with a relative error of <2%. Unlike hexagonal two-dimensional materials like graphene, transition metal dichalcogenides, and h-BN, the conduction band minimum of monolayer PdSe2 is not located along the high symmetry lines in the first Brillouin zone; this highlights the importance of the structure-property relationship in the pentagonal lattice. Interestingly, high valley convergence is found in the conduction and valence bands in monolayer, bilayer, and trilayer PdSe2 sheets, suggesting promising application in thermoelectric cooling.
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Affiliation(s)
- Minglei Sun
- School
of Mechanical Engineering, Southeast University, 79 Suyuan Avenue, Nanjing 211189, China
- Institute
of High Performance Computing, A*STAR, 1 Fusionopolis Way, Singapore 138632, Singapore
| | - Jyh-Pin Chou
- Department
of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong 999077, China
| | - Lihong Shi
- School
of Science, JiangNan University, 1800 Lihu Avenue, Wuxi 214122, China
| | - Junfeng Gao
- Institute
of High Performance Computing, A*STAR, 1 Fusionopolis Way, Singapore 138632, Singapore
| | - Alice Hu
- Department
of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong 999077, China
| | - Wencheng Tang
- School
of Mechanical Engineering, Southeast University, 79 Suyuan Avenue, Nanjing 211189, China
| | - Gang Zhang
- Institute
of High Performance Computing, A*STAR, 1 Fusionopolis Way, Singapore 138632, Singapore
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31
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Monolayer PdSe 2: A promising two-dimensional thermoelectric material. Sci Rep 2018; 8:2764. [PMID: 29426886 PMCID: PMC5807448 DOI: 10.1038/s41598-018-20918-9] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 01/26/2018] [Indexed: 11/10/2022] Open
Abstract
Motivated by the recent experimental synthesis of two-dimensional semiconducting film PdSe2, we investigate the electronic and thermal transport properties of PdSe2 monolayer by using the density functional theory and semiclassical Boltzmann transport equation. The calculated results reveal anisotropic transport properties. Low lattice thermal conductivity about 3 Wm−1 K −1 (300K) along the x direction is obtained, and the dimensionless thermoelectric figure of merit can reach 1.1 along the x direction for p-type doping at room temperature, indicating the promising thermoelectric performance of monolayer PdSe2.
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32
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Oyedele AD, Yang S, Liang L, Puretzky AA, Wang K, Zhang J, Yu P, Pudasaini PR, Ghosh AW, Liu Z, Rouleau CM, Sumpter BG, Chisholm MF, Zhou W, Rack PD, Geohegan DB, Xiao K. PdSe2: Pentagonal Two-Dimensional Layers with High Air Stability for Electronics. J Am Chem Soc 2017; 139:14090-14097. [DOI: 10.1021/jacs.7b04865] [Citation(s) in RCA: 308] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Akinola D. Oyedele
- Bredesen
Center for Interdisciplinary and Graduate Education, University of Tennessee, Knoxville, Tennessee 37996, United States
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Shize Yang
- Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Liangbo Liang
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander A. Puretzky
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kai Wang
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jingjie Zhang
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Peng Yu
- Center for Programmable Materials, School of Materials Science & Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Pushpa R. Pudasaini
- Department
of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Avik W. Ghosh
- Department
of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Zheng Liu
- Center for Programmable Materials, School of Materials Science & Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Christopher M. Rouleau
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Bobby G. Sumpter
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Computational Sciences & Engineering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Matthew F. Chisholm
- Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Wu Zhou
- Materials
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Philip D. Rack
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - David B. Geohegan
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Kai Xiao
- Bredesen
Center for Interdisciplinary and Graduate Education, University of Tennessee, Knoxville, Tennessee 37996, United States
- Center
for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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33
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Selb E, Götsch T, Janka O, Penner S, Heymann G. Crystal Structures of the High-Pressure Palladium Dichalcogenides Pd0.94(1)S2and Pd0.88(1)Se2Comprising Exceptional PdIVOxidation States. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700140] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Elisabeth Selb
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
| | - Thomas Götsch
- Institut für Physikalische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 52c 6020 Innsbruck Austria
| | - Oliver Janka
- Institut für Anorganische und Analytische Chemie; Westfälische Wilhelms-Universität Münster; Corrensstraße 28/30 48149 Münster Germany
| | - Simon Penner
- Institut für Physikalische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 52c 6020 Innsbruck Austria
| | - Gunter Heymann
- Institut für Allgemeine, Anorganische und Theoretische Chemie; Leopold-Franzens-Universität Innsbruck; Innrain 80-82 6020 Innsbruck Austria
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34
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Lin J, Zuluaga S, Yu P, Liu Z, Pantelides ST, Suenaga K. Novel Pd_{2}Se_{3} Two-Dimensional Phase Driven by Interlayer Fusion in Layered PdSe_{2}. PHYSICAL REVIEW LETTERS 2017; 119:016101. [PMID: 28731752 DOI: 10.1103/physrevlett.119.016101] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Indexed: 05/12/2023]
Abstract
Two-dimensional (2D) materials are easily fabricated when their bulk form has a layered structure. The monolayer form in layered transition-metal dichalcogenides is typically the same as a single layer of the bulk material. However, PdSe_{2} presents a puzzle. Its monolayer form has been theoretically shown to be stable, but there have been no reports that monolayer PdSe_{2} has been fabricated. Here, combining atomic-scale imaging in a scanning transmission electron microscope and density functional theory, we demonstrate that the preferred monolayer form of this material amounts to a melding of two bulk monolayers accompanied by the emission of Se atoms so that the resulting stoichiometry is Pd_{2}Se_{3}. We further verify the interlayer melding mechanism by creating Se vacancies in situ in the layered PdSe_{2} matrix using electron irradiation. The discovery that strong interlayer interactions can be induced by defects and lead to the formation of new 2D materials opens a new venue for the exploration of defect engineering and novel 2D structures.
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Affiliation(s)
- Junhao Lin
- National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305-8565, Japan
| | - Sebastian Zuluaga
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Peng Yu
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Zheng Liu
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
- NOVITAS, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Sokrates T Pantelides
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
- Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Kazu Suenaga
- National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 5, Tsukuba 305-8565, Japan
- Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-8656, Japan
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35
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Chow WL, Yu P, Liu F, Hong J, Wang X, Zeng Q, Hsu CH, Zhu C, Zhou J, Wang X, Xia J, Yan J, Chen Y, Wu D, Yu T, Shen Z, Lin H, Jin C, Tay BK, Liu Z. High Mobility 2D Palladium Diselenide Field-Effect Transistors with Tunable Ambipolar Characteristics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 28370566 DOI: 10.1002/adma.201602969] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 02/15/2017] [Indexed: 05/11/2023]
Abstract
Due to the intriguing optical and electronic properties, 2D materials have attracted a lot of interest for the electronic and optoelectronic applications. Identifying new promising 2D materials will be rewarding toward the development of next generation 2D electronics. Here, palladium diselenide (PdSe2 ), a noble-transition metal dichalcogenide (TMDC), is introduced as a promising high mobility 2D material into the fast growing 2D community. Field-effect transistors (FETs) based on ultrathin PdSe2 show intrinsic ambipolar characteristic. The polarity of the FET can be tuned. After vacuum annealing, the authors find PdSe2 to exhibit electron-dominated transport with high mobility (µe (max) = 216 cm2 V-1 s-1 ) and on/off ratio up to 103 . Hole-dominated-transport PdSe2 can be obtained by molecular doping using F4 -TCNQ. This pioneer work on PdSe2 will spark interests in the less explored regime of noble-TMDCs.
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Affiliation(s)
- Wai Leong Chow
- Centre for Micro-/Nano-electronics (NOVITAS), School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- CINTRA UMI CNRS/NTU/THALES, Singapore, 637553, Singapore
| | - Peng Yu
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Fucai Liu
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jinhua Hong
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China
| | - Xingli Wang
- Centre for Micro-/Nano-electronics (NOVITAS), School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- CINTRA UMI CNRS/NTU/THALES, Singapore, 637553, Singapore
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China
| | - Qingsheng Zeng
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Chuang-Han Hsu
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
| | - Chao Zhu
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jiadong Zhou
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China
| | - Xiaowei Wang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China
| | - Juan Xia
- School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 639798, Singapore
| | - Jiaxu Yan
- School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 639798, Singapore
| | - Yu Chen
- School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 639798, Singapore
| | - Di Wu
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
| | - Ting Yu
- School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 639798, Singapore
| | - Zexiang Shen
- CINTRA UMI CNRS/NTU/THALES, Singapore, 637553, Singapore
- School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 639798, Singapore
| | - Hsin Lin
- Department of Physics, National University of Singapore, Singapore, 117542, Singapore
| | - Chuanhong Jin
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China
| | - Beng Kang Tay
- Centre for Micro-/Nano-electronics (NOVITAS), School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- CINTRA UMI CNRS/NTU/THALES, Singapore, 637553, Singapore
| | - Zheng Liu
- CINTRA UMI CNRS/NTU/THALES, Singapore, 637553, Singapore
- Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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Selb E, Tribus M, Heymann G. Verbeekite, the Long-Unknown Crystal Structure of Monoclinic PdSe2. Inorg Chem 2017; 56:5885-5891. [DOI: 10.1021/acs.inorgchem.7b00544] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elisabeth Selb
- Institut für
Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universität Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Martina Tribus
- Institut für
Mineralogie und Petrographie, Leopold-Franzens-Universität Innsbruck, Innrain 52, A-6020 Innsbruck, Austria
| | - Gunter Heymann
- Institut für
Allgemeine, Anorganische und Theoretische Chemie, Leopold-Franzens-Universität Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
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37
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Strain-Modulated Electronic Structure and Infrared Light Adsorption in Palladium Diselenide Monolayer. Sci Rep 2017; 7:39995. [PMID: 28051184 PMCID: PMC5209744 DOI: 10.1038/srep39995] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 11/30/2016] [Indexed: 11/10/2022] Open
Abstract
Two-dimensional (2D) transition-metal dichalcogenides (TMDs) exhibit intriguing properties for both fundamental research and potential application in fields ranging from electronic devices to catalysis. Based on first-principles calculations, we proposed a stable form of palladium diselenide (PdSe2) monolayer that can be synthesized by selenizing Pd(111) surface. It has a moderate band gap of about 1.10 eV, a small in-plane stiffness, and electron mobility larger than that of monolayer black phosphorus by more than one order. Additionally, tensile strain can modulate the band gap of PdSe2 monolayer and consequently enhance the infrared light adsorption ability. These interesting properties are quite promising for application in electronic and optoelectronic devices.
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38
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Zhang Y, Liu Y, Fu S, Guo F, Qian Y. Hydrothermally Controlled Growth of MnPO4·H2O Single-Crystal Rods. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.270] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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