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2D Perovskite Single Crystals with Suppressed Ion Migration for High-Performance Planar-Type Photodetectors

Small (Weinheim an der Bergstrasse, Germany) 2020年第42期16卷 e2003145页

作者： Yunxia Zhang Yucheng Liu Zhuo Xu Zhou Yang Shengzhong Frank Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China. Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 China. University of the Chinese Academy of Sciences Beijing 100039 China.

2D Dion-Jacobson (DJ) perovskites have recently drawn much attention owing to their superior charge transport and high environmental stability. Unfortunately, their intrinsic optoelectronic properties are largely unexplored due to the lack of high-quality single crystals available for accurate measurements. Herein, a reactive, low-temperature-gradient crystallization process to grow high-quality 2D perovskite single crystal (BDAPbI ) using symmetric straight chain 1,4-butanediammonium as a short-chain insulating spacer is developed. It is found that the BDAPbI single crystal exhibits a direct bandgap with effective charge collection (μτ = 1.45 × 10 cm V ). In particular, the BDAPbI single crystal shows a high ion migration activation energy (0.88 eV) that is desired for stability. Moreover, the planar-type photodetectors made of BDAPbI single crystals demonstrate excellent photoresponse performance, including large dynamic linear range (150 dB), high responsivity (927 mA W ), fast response speed, and exceptional stability. Theoretical calculations reveal that the enhanced carrier transport properties are mainly attributed to the interlayer-induced coupling of the inorganic layers. Furthermore, the rigid structure of BDAPbI , resulting from the strong hydrogen bonds between the organic cations and the inorganic framework, will result in both low defect density and low ion migration, leading to superior carrier transport properties and detection performance.

关键词： 2D perovskite single crystals Dion-Jacobson (DJ) perovskites photodetectors single crystals

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Strength and electroconductivity of bulk nanostructured copper alloys

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IOP Conference Series: Materials science and engineering 2019年第1期672卷

作者： I V Alexandrov W Wei Ufa State Aviation Technical University Ufa 450008 Russia Sino-Russian Joint Laboratory of Functional Nanostructured Materials Jiangsu Key Laboratory of Materials Surface Science and Technology Changzhou University Changzhou 213164 P. R. China School of Materials Science and Engineering Changzhou University Changzhou 213164 P. R. China

The results of a study of the strength and conductivity of electrotechnical bulk nanostructured copper alloys obtained by methods of severe plastic deformation is presented. The contribution of the microstructure parameters to the formation of high strength while maintaining sufficient electrical conductivity is discussed.

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Multi-Group Polymer Coating on Zn Anode for High Overall Conversion Efficiency Photorechargeable Zinc-Ion Batteries

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Angewandte Chemie 2024年第39期136卷

作者： Ming Chen Xiaojun Guo Xiao Jiang Bita Farhadi Xin Guo Yan Zhu Haoxiang Zhang Shengzhong (Frank) Liu School of Electric Power Civil Engineering and Architecture College of Physics and Electronics Engineering State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University Taiyuan 030006 China These authors contributed equally Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal

The solar-driven photorechargeable zinc-ion batteries have emerged as a promising power solution for smart electronic devices and equipment. However, the subpar cyclic stability of the Zn anode remains a significant impediment to their practical application. Herein, poly(diethynylbenzene-1,3,5-triimine-2,4,6-trione) (PDPTT) was designed as a functional polymer coating of Zn. Theoretical calculations demonstrate that the PDPTT coating not only significantly homogenizes the electric field distribution on the Zn surface, but also promotes the ion-accessible surface of Zn. With multiple N and C=O groups exhibiting strong adsorption energies, this polymer coating reduces the nucleation overpotential of Zn, alters the diffusion pathway of Zn 2+ at the anode interface, and decreases the corrosion current and hydrogen evolution current. Leveraging these advantages, Zn-PDPTT//Zn-PDPTT exhibits an exceptionally long cycling time (≥4300 h, 1 mA cm −2 ). Zn-PDPTT//AC zinc-ion hybrid capacitors can withstand 50,000 cycles at 5 A/g. Zn-PDPTT//NVO zinc-ion battery exhibits a faster charge storage rate, higher capacity, and excellent cycling stability. Coupling Zn-PDPTT//NVO with high-performance perovskite solar cells results in a 13.12 % overall conversion efficiency for the photorechargeable zinc-ion battery, showcasing significant value in advancing the efficiency and upgrading conversion of renewable energy utilization.

关键词： photorechargeable zinc-ion batteries perovskite solar cells overall conversion efficiency

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Grain Boundaries: Nanoassembly Growth Model for Subdomain and Grain Boundary Formation in 1T′ Layered ReS2(Adv. Funct. Mater. 49/2019)

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advanced Functional Materials 2019年第49期29卷

作者： Xiaobo Li Xiao Wang Jinhua Hong Dongyan Liu Qingliang Feng Zhibin Lei Kaihui Liu Feng Ding Hua Xu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China Center for Multidimensional Carbon Materials Institute for Basic Science School of Materials Science and Engineering Ulsan National Institute of Science and Technology Ulsan 44919 South Korea Nanostructures Research Laboratory Japan Fine Ceramics Center Atsuta Nagoya 456‐8587 Japan School of Science Northwestern Polytechnical University Xi'an 710072 P. R. China State Key Laboratory for Mesoscopic Physics Collaborative Innovation Center of Quantum Matter School of Physics Peking University Beijing 100871 China

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Fluctuation-driven, topology-stabilized order in a correlated nodal semimetal

arXiv

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arXiv 2021年

作者： Drucker, Nathan C. Nguyen, Thanh Han, Fei Luo, Xi Andrejevic, Nina Zhu, Ziming Bednik, Grigory Nguyen, Quynh T. Chen, Zhantao Nguyen, Linh K. Williams, Travis J. Stone, Matthew B. Kolesnikov, Alexander I. Chi, Songxue Fernandez-Baca, Jaime Hogan, Tom Alatas, Ahmet Puretzky, Alexander A. Geohegan, David B. Huang, Shengxi Yu, Yue Li, Mingda Quantum Matter Group MIT CambridgeMA02139 United States John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA02138 United States Department of Nuclear Science and Engineering MIT CambridgeMA02139 United States College of Science University of Shanghai for Science and Technology Shanghai200093 China Department of Materials Science and Engineering MIT CambridgeMA02139 United States School of Physics and Electronics Hunan Normal University Changsha410081 China Department of Physics University of California Santa CruzCA95064 United States Department of Physics MIT CambridgeMA02139 United States Department of Mechanical Engineering MIT CambridgeMA02139 United States Neutron Scattering Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Quantum Design Inc. San DiegoCA92121 United States Advanced Photon Source Argonne National Laboratory LemontIL60439 United States Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Electrical Engineering The Pennsylvania State University State CollegePA16802 United States Department of Physics State Key Laboratory of Surface Physics Fudan University Shanghai200433 China

The interplay between strong electron correlation and band topology is at the forefront of condensed matter research1–3. As a direct consequence of correlation, magnetism enriches topological phases and also has promising functional applications4,5. However, the influence of topology on magnetism remains unclear, and the main research effort has been limited to ground state magnetic orders. Here we report a novel order above the magnetic transition temperature in magnetic Weyl semimetal (WSM) CeAlGe. Such order shows a number of anomalies in electrical and thermal transport, and neutron scattering measurements. We attribute this order to the coupling of Weyl fermions and magnetic fluctuations originating from a three-dimensional Seiberg-Witten monopole, which qualitatively agrees well with the observations. Our work reveals a prominent role topology may play in tailoring electron correlation beyond ground state ordering, and offers a new avenue to investigate emergent electronic properties in magnetic topological materials. Copyright © 2021, The Authors. All rights reserved.

关键词： Topology

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Robust Self-Assembled Molecular Passivation for High-Performance Perovskite Solar Cells

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Angewandte Chemie 2022年第25期134卷

作者： Dr. Haodan Guo Dr. Yanyan Fang Prof. Hong-Bo Cheng Dr. Jinpeng Wu Dr. Yan Lei Shumao Wang Xiangrong Li Prof. Yuhua Dai Prof. Wanchun Xiang Prof. Ding-Jiang Xue Prof. Yuan Lin Prof. Anders Hagfeldt Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical Materials College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China College of Material Science and Engineering Beijing Institute of Petrochemical Technology Beijing 102617 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Department of Chemistry Ångström Laboratory Uppsala University Uppsala 75120 Sweden

Defect passivation via post-treatment of perovskite films is an effective method to fabricate high-performance perovskite solar cells (PSCs). However, the passivation durability is still an issue due to the weak and vulnerable bonding between passivating functional groups and perovskite defect sites. Here we propose a cholesterol derivative self-assembly strategy to construct crosslinked and compact membranes throughout perovskite films. These supramolecular membranes act as a robust protection layer against harsh operational conditions while providing effective passivation of defects from surface toward inner grain boundaries. The resultant PSCs exhibit a power conversion efficiency of 23.34 % with an impressive open-circuit voltage of 1.164 eV. The unencapsulated devices retain 92 % of their initial efficiencies after 1600 h of storage under ambient conditions, and remain almost unchanged after heating at 85 °C for 500 h in a nitrogen atmosphere, showing significantly improved stability.

关键词： Durable Passivation Intermolecular Interaction Membrane Perovskite Solar Cells Self-Assembly

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Front Cover: Hollow Structure VS2@Reduced Graphene Oxide (RGO) Architecture for Enhanced Sodium-Ion Battery Performance (ChemElectroChem 1/2020)

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ChemElectroChem 2019年第1期7卷

作者： Haimei Qi Lina Wang Tiantian Zuo Shunlan Deng Prof. Qi Li Prof. Zong-Huai Liu Prof. Peng Hu Prof. Xuexia He Key Laboratory of Applied Surface and Colloid Chemistry Shaanxi Normal University) Ministry of Education Xi'an 710062 China Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi' an 710119 China School of Physics Northwest University Xi'an 710069 China

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Quantum tricriticality of incommensurate phase induced by quantum domain walls in frustrated Ising magnetism

arXiv

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arXiv 2020年

作者： Zhou, Zheng Liu, Changle Liu, Dong-Xu Yan, Zheng Chen, Yan Zhang, Xue-Feng Perimeter Institute for Theoretical Physics WaterlooONN2L 2Y5 Canada Department of Physics and State Key Laboratory of Surface Physics Fudan University Shanghai200438 China Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada School of Engineering Dali University Yunnan Dali671003 China Shenzhen Institute for Quantum Science and Technology and Department of Physics Southern University of Science and Technology Shenzhen518055 China Department of Physics Center of Quantum Materials and Devices Chongqing University Chongqing401331 China Chongqing Key Laboratory for Strongly Coupled Physics Chongqing University Chongqing401331 China Department of Physics and HKU-UCAS Joint Institute of Theoretical and Computational Physics The University of Hong Kong Pokfulam Road Hong Kong Beihang Hangzhou Innovation Institute Yuhang Hangzhou310023 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

Incommensurability plays a critical role in many strongly correlated systems. In some cases, the origin of such exotic order can be theoretically understood in the framework of 1d line-like topological excitations known as "quantum strings". Here we study an extended transverse field Ising model on a triangular lattice. Using the large scale quantum Monte Carlo simulations, we find that the spatial anisotropy can stabilize an incommensurate phase out of the commensurate clock order. Our results for the structure factor and the string density exhibit a linear relationship between incommensurate ordering wave vector and the density of quantum strings, which is reminiscent of hole density in under-doped cuprate superconductors. When introducing the next-nearest-neighbor interaction, we observe a quantum tricritical point out of the incommensurate phase. After carefully analyzing the ground state energies within different string topological sectors, we conclude that this tricriticality is non-trivially caused by effective long-range inter-string interactions with two competing terms following different decaying behaviors. Copyright © 2020, The Authors. All rights reserved.

关键词： Monte Carlo methods

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High-Efficiency Perovskite Solar Cells Enabled by Guanylation Reaction for Removing MACl Residual and In-Situ Forming 2D Perovskite

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Angewandte Chemie 2024年第7期137卷

作者： Zhuang Xie Yuwei Duan Minghui Cheng Yong Li Zhike Liu Hongxiang Li Yu Chen Zhigang Zang Shengzhong Liu Qiang Peng College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu 610059 P. R. China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China College of Polymer Science and Engineering Sichuan University Chengdu 610065 P. R. China Key Laboratory of Optoelectronic Technology & Systems Ministry of Education Chongqing University Chongqing 400044 P. R. China School of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China

The thermodynamical deprotonation of methylammonium chloride (MACl) has several detrimental influences on the quality of formamidinium (FA + )-based perovskite, which limits both efficiency and stability of inverted perovskite solar cells (IPSCs). Herein, a new additive strategy was developed by introducing methyl carbamimidothioate hydroiodide (MCH) into perovskite precursor, where guanylation reaction occurred between MCH and MACl to form a new intermediate of methyl-substituted guanidine (MSG). MSG could then bond with undercoordinated Pb 2+ to in situ form a two-dimensional (2D) perovskite, which would promote the growth and crystallization of three-dimensional (3D) perovskite with higher crystallinity, lower defect-states density and superior stability. Finally, the MCH-treated IPSC with a small area (0.09 cm 2 ) achieved an impressive power conversation efficiency (PCE) of 26.81 % (certified as 26.02 %), which is one of the highest PCEs reported to date. The large area MCH-treated device (1.00 cm 2 ) also obtained a high PCE of 24.36 %. Moreover, the unencapsulated and MCH-treated device exhibited excellent operational stability, maintaining 91.95 % and 97.06 % of their initial efficiencies after aging in air and a nitrogen-filled atmosphere at 85 °C for 1200 h. The encapsulated MCH-treated devices retained 94.25 % of its initial efficiency after continuously tracking at the maximum power-point for 1200 h in air.

关键词： Inverted perovskite solar cells Guanylation reaction Methylammonium chloride residual Two-dimensional perovskite Growth and crystallization

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Reentrant quantum anomalous Hall effect in molecular beam epitaxy-grown MnBi2Te4 thin films

arXiv

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arXiv 2024年

作者： Li, Yuanzhao Bai, Yunhe Feng, Yang Luan, Jianli Gao, Zongwei Chen, Yang Tong, Yitian Liu, Ruixuan Chong, Su Kong Wang, Kang L. Zhou, Xiaodong Shen, Jian Zhang, Jinsong Wang, Yayu Chen, Chui-Zhen Xie, XinCheng Feng, Xiao He, Ke Xue, Qi-Kun Beijing Academy of Quantum Information Sciences Beijing100193 China State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Department of Electrical and Computer Engineering University of California Los Angeles Los AngelesCA90095 United States Department of Physics and Astronomy University of California Los Angeles Los AngelesCA90095 United States State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200438 China Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai200438 China Zhangjiang Fudan International Innovation Center Fudan University Shanghai201210 China Shanghai Research Center for Quantum Sciences Shanghai201315 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China School of Physical Science and Technology Soochow University Suzhou215006 China Institute for Advanced Study Soochow University Suzhou215006 China International Center for Quantum Materials School of Physics Peking University Beijing100871 China Southern University of Science and Technology Shenzhen518055 China Frontier Science Center for Quantum Information Beijing100084 China Hefei National Laboratory Hefei230088 China

In the realm of topological quantum physics, it is widely accepted that a global bandgap is necessary to achieve quantized Hall conductance, irrespective of its origin-magnetic field, exchange coupling or other mechanisms. A material exhibiting the quantum anomalous Hall (QAH) effect had been considered equivalent to a Chern insulator, a band insulator with non-zero Chern number. However, a Chern Anderson insulator (CAI), which arises in a conducting state with exchange-induced Berry curvature splitting and disorder-induced Anderson localization, can in principle exhibit the QAH effect. In this study, we investigate intrinsic magnetic topological insulator MnBi2Te4 thin films grown by molecular beam epitaxy (MBE). We observe a reentrant QAH effect when the Fermi energy enters the valance band and magnetic field equals zero, indicating the emergence of the CAI state. The discovery opens a new avenue for realizing the QAH effect and underscores the fundamental role of both Berry curvature and Anderson localization. © 2024, CC BY-NC-ND.

关键词： Molecular beam epitaxy

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