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Kinetics Controlled Perovskite Crystallization for High Performance Solar Cells

Angewandte Chemie 2024年第14期136卷

作者： Jinghao Ge Ran Chen Yabin Ma Yunfan Wang Yingjie Hu Lu Zhang Fengzhu Li Xiaokang Ma Sai-Wing Tsang Jiaxue You Alex K. Y. Jen 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 International Joint Research Center of Shaanxi Province for Photoelectric Materials Science Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University No. 620 West Chang'an Avenue Xi'an 710119 China These authors contributed equally. School of Materials Science and Engineering Xi'an University of Science and Technology No. 67 Xiaozhai East Road Xi'an Shaanxi 710054 PR China Department of Materials Science and Engineering Hong Kong Institute for Clean Energy City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong SAR China State Key Laboratory of Solidification Processing Northwestern Polytechnical University No. 127 Laodong West Road Xi'an Shaanxi 710072 PR China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences No.457 Zhongshan Road Shahekou District Dalian 116023 China University of the Chinese Academy of Sciences No. 80 Zhongguancun East Road Beijing 100039 China

The power conversion efficiencies (PCEs) of perovskite solar cells have recently developed rapidly compared to crystalline silicon solar cells. To have an effective way to control the crystallization of perovskite thin films is the key for achieving good device performance. However, a paradox in perovskite crystallization is from the mismatch between nucleation and Oswald ripening. Usually, the large numbers of nucleation sites tend to weak Oswald ripening. Here, we proposed a new mechanism to promote the formation of nucleation sites by reducing surface energy from 44.9 mN/m to 36.1 mN/m, to spontaneously accelerate the later Oswald ripening process by improving the grain solubility through the elastic modulus regulation. The ripening rate is increased from 2.37 Åm ⋅ s −1 to 4.61 Åm ⋅ s −1 during annealing. Finally, the solar cells derived from the optimized films showed significantly improved PCE from 23.14 % to 25.32 %. The long-term stability tests show excellent thermal stability (the optimized device without encapsulation maintaining 82 % of its initial PCE after 800 h aging at 85 °C) and an improved light stability under illumination. This work provides a new method, the elastic modulus regulation, to enhance the ripening process.

关键词： Perovskite solar cells Oswald ripening crystallization kinetics nucleation surface energy

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Author Correction: Fine cubic Cu2O nanocrystals as highly selective catalyst for propylene epoxidation with molecular oxygen

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Nature communications 2021年第1期12卷 6429页

作者： Wei Xiong Xiang-Kui Gu Zhenhua Zhang Peng Chai Yijing Zang Zongyou Yu Dan Li Hui Zhang Zhi Liu Weixin Huang Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes and Department of Chemical Physics University of Science and Technology of China 230026 Hefei People's Republic of China. School of Power and Mechanical Engineering Wuhan University 430072 Wuhan People's Republic of China. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces Institute of Physical Chemistry Zhejiang Normal University 321004 Jinhua People's Republic of China. State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 200050 Shanghai People's Republic of China. School of Physical Science and Technology ShanghaiTech University 201210 Shanghai People's Republic of China. Hefei National Laboratory for Physical Sciences at the Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes and Department of Chemical Physics University of Science and Technology of China 230026 Hefei People's Republic of China. huangwx@***. Dalian National Laboratory for Clean Energy 116023 Dalian People's Republic of China. huangwx@***.

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Corrigendum to “the dual role of shot peening in hydrogen-assisted cracking of PSB1080 high strength steel” [Mater. Des. 110 (2016) 602–615]

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Materials & Design 2019年 166卷

作者： Xinfeng Li Jin Zhang Yanfei Wang Mingming Ma Sicong Shen Xiaolong Song State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University Xi'an 710049 China Department of Geosciences Center for Materials by Design Institute for Advanced Computational Science State University of New York Stony Brook NY 11794-2100 USA School of Chemical Engineering & Technology China University of Mining and Technology Xuzhou 221116 China School of Department of Heat Treatment and Surface Treatment Avic Aircraft. Co. Ltd. Xi'an Brake Branch Xingping 713106 China

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A General Strategy Based on Hetero-Charge Coupling Effect for Constructing Single-Atom Sites

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Angewandte Chemie 2024年第36期136卷

作者： Cheng Peng Mingyue Wang Sha Li Xuezhi Zeng Jieyue Wang Wenhai Wang Zhirong Zhang Mingfu Ye Xianwen Wei Konglin Wu Kui Zhang Jie Zeng Institute of Clean Energy and Advanced Nanocatalysis (iClean) School of Chemistry and Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243032 P. R. China Chemistry and Chemical Engineering of Guangdong Laboratory Shantou Guangdong 515063 P. R. China Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China School of Chemistry and Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243032 P. R. China

Single-atom catalysts have emerged as cutting-edge hotspots in the field of material science owing to their excellent catalytic performance brought about by well-defined metal single-atom sites (M SASs). However, huge challenges still lie in achieving the rational design and precise synthesis of M SASs. Herein, we report a novel synthesis strategy based on the hetero-charge coupling effect (HCCE) to prepare M SASs loaded on N and S co-doped porous carbon (M 1 /NSC). The proposed strategy was widely applied to prepare 17 types of M 1 /NSC composed of single or multi-metal with the integrated regulation of the coordination environment and electronic structure, exhibiting good universality and flexible adjustability. Furthermore, this strategy provided a low-cost method of efficiently synthesizing M 1 /NSC with high yields, that can produce more than 50 g catalyst at one time, which is key to large-scale production. Among various as-prepared unary M 1 /NSC (M can be Fe, Co, Ni, V, Cr, Mn, Mo, Pd, W, Re, Ir, Pt, or Bi) catalysts, Fe 1 /NSC delivered excellent performance for electrocatalytic nitrate reduction to NH 3 with high NH 3 Faradaic efficiency of 86.6 % and high NH 3 yield rate of 1.50 mg h −1 mg cat. −1 at −0.6 V vs. RHE. Even using Fe 1 /NSC as a cathode in a Zn-nitrate battery, it exhibited a high open circuit voltage of 1.756 V and high energy density of 4.42 mW cm −2 with good cycling stability.

关键词： Single-atom catalyst General synthesis Hetero-charge coupling effect Precise preparation Electrocatalytic nitrate reduction

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Ligand engineering Enables Efficient Pure Red Tin-Based Perovskite Light-Emitting Diodes

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Angewandte Chemie 2023年第50期135卷

作者： Wenhao Bai Mingming Liang Dr. Tongtong Xuan Ting Gong Prof. Liang Bian Prof. Huili Li Prof. Rong-Jun Xie Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials College of Materials Xiamen University Xiamen 361005 P. R. China Shenzhen Research Institute of Xiamen University Shenzhen 518000 P. R. China State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and Technology Sichuan 621010 P. R. China Engineering Research Center for Nanophotonics and Advanced Instrument Ministry of Education School of Physics and Electronic Science East China Normal University Shanghai 200241 P. R. China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen 361005 P. R. China

With increasing ecological and environmental concerns, tin (Sn)-based perovskite light-emitting diodes (PeLEDs) are competitive candidates for future displays because of their environmental friendliness, excellent photoelectric properties, and low-cost solution-processed fabrication. Nonetheless, their electroluminescence (EL) performance still lags behind that of lead (Pb)-based PeLEDs due to the fast crystallization rate of Sn-based perovskite films and undesired oxidation from Sn 2+ to Sn 4+ , leading to poor film morphology and coverage, as well as high density defects. Here, we propose a ligand engineering strategy to construct high-quality phenethylammonium tin iodide (PEA 2 SnI 4 ) perovskite films by using L-glutathione reduced (GSH) as surface ligands toward efficient pure red PEA 2 SnI 4 -based PeLEDs. We show that the hydrogen-bond and coordinate interactions between GSH and PEA 2 SnI 4 effectively reduce the crystallization rate of the perovskites and suppress the oxidation of Sn 2+ and formation of defects. The improved pure red perovskite films not only show excellent uniformity, density, and coverage but also exhibit enhanced optical properties and stability. Finally, state-of-the-art pure red PeLEDs achieve a record external quantum efficiency of 9.32 % in the field of PEA 2 SnI 4 -based devices. This work demonstrates that ligand engineering represents a feasible route to enhance the EL performance of Sn-based PeLEDs.

关键词： Electroluminescence Lead-Free Light-Emitting Diode Perovskite Pure-Red

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Possible structural origin of superconductivity in Sr-doped Bi2Se3

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Physical Review Materials 2018年第1期2卷 014201-014201页

作者： Zhuojun Li Meng Wang Dejiong Zhang Nan Feng Wenxiang Jiang Chaoqun Han Weijiong Chen Mao Ye Chunlei Gao Jinfeng Jia Jixue Li Shan Qiao Dong Qian Ben Xu He Tian Bo Gao CAS Center for Excellence in Superconducting Electronics (CENSE) Shanghai 200050 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences 865 Changning Road Shanghai 200050 China University of Chinese Academy of Sciences Beijing 100049 China Center of Electron Microscopy and State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 People's Republic of China Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

Doping bismuth selenide (Bi2Se3) with elements such as copper and strontium (Sr) can induce superconductivity, making the doped materials interesting candidates to explore potential topological superconducting behaviors. It was thought that the superconductivity of doped Bi2Se3 was induced by dopant atoms intercalated in van der Waals gaps. However, several experiments have shown that the intercalation of dopant atoms may not necessarily make doped Bi2Se3 superconducting. Thus, the structural origin of superconductivity in doped Bi2Se3 remains an open question. Herein, we combined material synthesis and characterization, high-resolution transmission electron microscopy, and first-principles calculations to study the doping structure of Sr-doped Bi2Se3. We found that the emergence of superconductivity is strongly related with n-type dopant atoms. Atomic-level energy-dispersive x-ray mapping revealed various n-type Sr dopants that occupy intercalated and interstitial positions. First-principles calculations showed that the formation energy of a specific interstitial Sr doping position depends strongly on the Sr doping level. This site changes from a metastable position at low Sr doping level to a stable position at high Sr doping level. The calculation results explain why quenching is necessary to obtain superconducting samples when the Sr doping level is low and also why slow furnace cooling can yield superconducting samples when the Sr doping level is high. Our findings suggest that Sr atoms doped at interstitial locations, instead of those intercalated in van der Waals gaps, are most likely to be responsible for the emergence of superconductivity in Sr-doped Bi2Se3.

关键词： Dopants Impurities in superconductors

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Rücktitelbild: Universal Sub-Nanoreactor Strategy for Synthesis of Yolk-Shell MoS2Supported Single Atom Electrocatalysts toward Robust Hydrogen Evolution Reaction (Angew. Chem. 40/2023)

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Angewandte Chemie 2023年第40期135卷

作者： Feilong Gong Yuheng Liu Yang Zhao Prof. Wei Liu Prof. Guang Zeng Prof. Guoqing Wang Prof. Yonghui Zhang Lihua Gong Prof. Jian Liu Key Laboratory of Surface and Interface Science and Technology of Henan Province College of Material and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou Henan 450001 P. R. China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian Liaoning 116023 P. R. China DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process Engineering and Advanced Technology Institute of University of Surrey Guildford Surrey GU2 7XH UK College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot Inner Mongolia 010021 P. R. China

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Author Correction: Concise N-doped Carbon Nanosheets/Vanadium Nitride Nanoparticles Materials via Intercalative Polymerization for Supercapacitors

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Scientific reports 2018年第1期8卷 6428页

作者： Yongtao Tan Ying Liu Zhenghua Tang Zhe Wang Lingbin Kong Long Kang Zhen Liu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou 730050 P. R. China. School of Material Science and Engineering Lanzhou University of Technology Lanzhou 730050 Gansu P. R. China. Guangzhou Key Laboratory for Surface Chemistry of Energy Materials New Energy Research Institute School of Environment and Energy South China University of Technology Guangzhou Higher Education Mega Centre Guangzhou 510006 China. Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal South China University of Technology Guangzhou Higher Education Mega Centre Guangzhou 510006 China. Department of Chemistry Xavier University of Louisiana New Orleans LA 70125 USA. Department of Physics & Engineering Frostburg State University Frostburg MD 21532-2303 USA. zliu@frostburg.edu. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou 730050 P. R. China. ranfen@***. School of Material Science and Engineering Lanzhou University of Technology Lanzhou 730050 Gansu P. R. China. ranfen@***.

A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.

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Back Cover: Universal Sub-Nanoreactor Strategy for Synthesis of Yolk-Shell MoS2Supported Single Atom Electrocatalysts toward Robust Hydrogen Evolution Reaction (Angew. Chem. Int. Ed. 40/2023)

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Angewandte Chemie International Edition 2023年第40期62卷

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MOFs‐Based Heterogeneous Catalysts: New Opportunities for Energy‐Related CO2Conversion

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advanced Energy Materials 2018年第32期8卷

作者： Zhendong Lei Yuancheng Xue Wenqian Chen Wenhui Qiu Yong Zhang Satoshi Horike Liang Tang School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 P. R. China NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore 117583 Singapore Shanghai Institute of Applied Radiation Shanghai University 20 Chengzhong Road Shanghai 201800 P. R. China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 Guangzhou P. R. China State Environmental Protection Key Laboratory of Integrated Surface Water‐Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 Guangzhou P. R. China Institute for Integrated Cell‐Material Sciences (WPI‐iCeMS) Institute for Advanced Study Kyoto University Yoshida Sakyo‐ku Kyoto 606‐8501 Japan

Metal–organic frameworks (MOFs) with high surface area and tunable chemical structures have attracted tremendous attention. Recently, the utilization of solar energy for CO 2 conversion to produce valuable chemicals or fuels has become extremely appealing. The interior of MOFs can be designed to have defects, heteroatoms and embedded nanoscale metal catalysts for the development of CO 2 conversion. In this review, the recent development of MOFs‐based catalysts for CO 2 conversion reactions, including photocatalysis and electrocatalysis are summarized. In particular, the preparation and mechanism of CO 2 conversion‐based MOFs are discussed. The examples are expected to provide deeper understanding in preparing highly active and stable MOFs‐based CO 2 conversion materials.

关键词： electrocatalysis energy products kinetics metal–organic frameworks (MOFs) photocatalysis

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