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Direct Growth of Pyramid‐Textured Perovskite Single Crystals: A New Strategy for Enhanced Optoelectronic Performance

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advanced Functional Materials 2020年第34期30卷

作者： Yunxia Zhang Yucheng Liu Zhou Yang Ming Chen 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 (SNNU) 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

Even though there have been a few reports of substrate surface texturing of thin film perovskite solar cells to enhance their light trapping, there has been no direct texturing of the perovskite material, let alone perovskite single crystals (SCs). Herein, a method to prepare a pyramid‐structured perovskite CH 3 NH 3 PbX 3 (CH 3 NH 3 + = MA, X = I, Br) SC surface with minimized light reflection and maximized incident light harvesting is reported. Specifically, a hard template is used to directly transfer the pyramidal texture onto the MAPbX 3 SC during its growth. A well‐shaped pyramidal texture is formed on the single‐crystal surface leading to improved light trapping. The textured MAPbBr 3 SC shows good crystallinity, prolonged carrier lifetime, and improved carrier mobility. Furthermore, the photodetector made from the textured SC shows enhanced responsivity of 321 A W −1 and external quantum efficiency of 7191%, about two times higher than that of a control device. This method may be used to directly fabricate desired textures on general single crystal surfaces.

关键词： light trapping perovskite single crystals photodetectors pyramid‐textured MAPbBr3

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First-Principles Calculation Design for 2D Perovskite to Suppress Ion Migration for High-Performance X-ray Detection

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advanced Functional Materials 2021年第15期32卷

作者： Bobo Zhang Zhuo Xu Chuang Ma Haojin Li Yucheng Liu Lili Gao Jing Zhang Jiaxue You 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 116023 China University of the Chinese Academy of Sciences Beijing 100039 China

Ion migration is a key root-cause of photocurrent instability in perovskite X-ray detectors. Although 2D perovskite single crystal (PSC) is a good candidate to suppress ion migration compared with its 3D counterpart, its intrinsic stability still needs to be improved. In this work, it is first envisioned to conquer the ion migration by enhanced chemical bonding; the proposal is further confirmed by density functional theory calculations, in which the bonds are made stronger by introducing a fluorine atom into the ortho position of phenethylamine (o-F-PEA) to shorten the distance between adjacent organic cations in the crystal lattice for enhanced electrostatic interactions between the F atom and the neighboring benzene ring. It is further demonstrated experimentally that the activation energy for ion migration (AEIM) of (o-F-PEA) 2 PbI 4 PSC is increased compared with that of (PEA) 2 PbI 4 PSC. The improved AEIM is also confirmed by enhanced thermal stability. Consequently, the dark current in the (o-F-PEA) 2 PbI 4 2D PSC X-ray detectors is reduced by two times compared with the (PEA) 2 PbI 4 reference. Furthermore, the detector shows the sensitivity of 1724.5 μC Gy air −1 cm −2 at 1250 V mm −1 , and much improved photocurrent stability.

关键词： 2D single crystals enhanced stability experiments and calculations ion migration perovskite X-ray detector

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Solar Cells: 3D–2D–0D Interface Profiling for Record Efficiency All‐Inorganic CsPbBrI2Perovskite Solar Cells with Superior Stability (Adv. Energy Mater. 15/2018)

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advanced Energy Materials 2018年第15期8卷

作者： Jingru Zhang Dongliang Bai Zhiwen Jin Hui Bian Kang Wang Jie Sun Qian Wang Shengzhong (Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Laboratory for Advanced Energy Technology School of Materials Science & Engineering Shaanxi Normal University Xi'an 710119 P. R. China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China

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Evidence for the random singlet phase in the honeycomb iridate SrIr2O6

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Physical Review B 2021年第24期103卷 L241114-L241114页

作者： Pengbo Song Kejia Zhu Fan Yang Yuan Wei Lu Zhang Huaixin Yang Xian-Lei Sheng Yang Qi Jiamin Ni Shiyan Li Yanchun Li Guanghan Cao Zi Yang Meng Wei Li Youguo Shi Shiliang Li Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100190 China School of Physics and Materials Science Anhui University Hefei Anhui 230601 China School of Physics Beihang University Beijing 100191 China Yangtze River Delta Physics Research Center Co. Ltd. Liyang Jiangsu 213300 China Center for Field Theory and Particle Physics Department of Physics Fudan University Shanghai 200433 China State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai 200438 China Multidiscipline Research Center Institute of High Energy Physics Chinese Academy of Science Beijing 100049 China Department of Physics Zhejiang University Hangzhou 310027 China Zhejiang Province Key Laboratory of Quantum Technology and Devices Interdisciplinary Center for Quantum Information and State Key Lab of Silicon Materials Zhejiang University Hangzhou 310027 China Collaborative Innovation Centre of Advanced Microstructures Nanjing University Nanjing 210093 China Department of Physics and HKU-UCAS Joint Institute of Theoretical and Computational Physics The University of Hong Kong Pokfulam Road Hong Kong China International Research Institute of Multidisciplinary Science Beihang University Being 100191 China Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China

Strong spin-orbital-coupling magnetic systems with the honeycomb structure can provide bond-directional interactions which may result in Kitaev quantum spin liquids and exotic anyonic excitations. However, one of the key ingredients in real materials—disorders—has been much less studied in Kitaev systems. Here we synthesized a trigonal SrIr2O6−δ with δ≈0.25, which consists of two-dimensional honeycomb Ir planes with edge-sharing IrO6 octahedra. First-principles computation and experimental measurements suggest that the electronic system is gapped, and there should be no magnetic moment as the Ir5+ ion has no unpaired electrons. However, significant magnetism has been observed in the material, and it can be attributed to disorders that are most likely from oxygen vacancies. No magnetic order is found down to 0.05 K, and the low-temperature magnetic properties exhibit power-law behaviors in magnetic susceptibility and zero-field specific heat, and a single-parameter scaling of the specific heat under magnetic fields. These results provide strong evidence for the existence of the random singlet phase in SrIr2O6−δ, which offers a different member to the family of spin-orbital entangled iridates and Kitaev materials.

关键词： Quantum spin liquid Honeycomb lattice Crystal growth DC susceptibility measurements Density functional theory Resistivity measurements Specific heat measurements

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Polarity regulation for stable 2D-perovskite-encapsulated high-efficiency 3D-perovskite solar cells

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Nano Energy 2022年 95卷

作者： Hang Su Lu Zhang Yucheng Liu Yingjie Hu Bobo Zhang Jiaxue You Xinyi Du Jing Zhang Xiaodong Ren Jing Gou Shengzhong (Frank) Liu Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China University of the Chinese Academy of Sciences Beijing 100039 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 University Xi’an 710119 China

There have been a few types of passivators used to improve the efficiency and stability of perovskite solar cells. It seems that strong interactions between the passivator and the [PbI 6 ] 4- octahedron are beneficial not only for defect passivation but also for suppressing ion migration. Here, we used molecular induction to design model passivators including ortho-fluorinated phenethylamine (2-F-PEAI) and ortho-fluorinated benzylamine (2-F-PMAI) to attain an optimized effect by regulating the interaction between the passivator and the [PbI 6 ] 4- octahedron. The first-principals study and experimental results including FTIR NMR and TGA show that the larger molecular polarity of the passivator, the stronger the interactions between the passivator and the perovskite surface. These were used to systematically scrutinize the polarity regulation to establish a general passivation model with parameters including the passivator molecular structure, polarity, thermal decomposition temperature and power conversion efficiency (PCE). Consequently, the solar cell efficiency is significantly improved to as high as 23.5% with very good reproducibility. The excellent long-term stability is manifested by 82.5% of the initial PCE remaining after 2000 h of aging under relative humidity (RH) 40% at ambient temperature. Finally, large-area devices (1 cm 2 ) with PCE over 20% have been prepared to show the uniformity of the perovskite film for further upscaling.

关键词： Perovskite solar cell Polarity regulation High efficiency Stability Large-area device

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Innenrücktitelbild: Exploring Aqueous Solution-Processed Pseudohalide Rare-Earth Double Perovskite Ferroelectrics toward X-Ray Detection with High Sensitivity (Angew. Chem. 49/2024)

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Angewandte Chemie 2024年第49期136卷

作者： Dr. Chang-Feng Wang Ye Yang Yu Hu Dr. Chuang Ma Hao-Fei Ni Pei-Guo Liu Dr. Hai-Feng Lu Dr. Zhi-Xu Zhang Prof. Jianguo Wang Prof. Yujian Zhang Prof. Da-Wei Fu Prof. Kui Zhao Prof. Yi Zhang Institute for Science and Applications of Molecular Ferroelectrics Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Zhejiang Normal University 321004 Jinhua People's Republic of China Key Laboratory of Applied Surface and Colloid Chemistry National 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 710119 Xi'an People's Republic of China College of Chemistry and Chemical Engineering Inner Mongolia Key Laboratory of Fine Organic Synthesis Inner Mongolia University 010021 Hohhot People's Republic of China

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Correction: Formamidinium-based Ruddlesden–Popper perovskite films fabricated via two-step sequential deposition: quantum well formation, physical properties and film-based solar cells

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Energy & Environmental science 2022年第5期15卷 2164-2164页

作者： Jing Lu Tinghuan Yang Tianqi Niu Nuo Bu Yalan Zhang Shiqiang Wang Junjie Fang Xiaoming Chang Tao Luo Jialun Wen Yingguo Yang Zicheng Ding Kui Zhao 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 School of Materials Science and Engineering Shaanxi Normal University Xi’an 710119 China Shanghai Synchrotron Radiation Facility (SSRF) Zhangjiang Lab Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 China School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology Changzhou University Changzhou 213164 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China

Correction for ‘Formamidinium-based Ruddlesden–Popper perovskite films fabricated via two-step sequential deposition: quantum well formation, physical properties and film-based solar cells’ by Jing Lu et al., Energ...

Correction for ‘Formamidinium-based Ruddlesden–Popper perovskite films fabricated via two-step sequential deposition: quantum well formation, physical properties and film-based solar cells’ by Jing Lu et al., Energy Environ. Sci., 2022, 15, 1144–1155, DOI: 10.1039/D1EE02851K.

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Glycol Monomethyl Ether-Substituted Carbazolyl Hole-Transporting Material for Stable Inverted Perovskite Solar Cells with Efficiency of 25.52 %

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Angewandte Chemie 2024年第33期136卷

作者： Hui Zhou Weilin Wang Prof. Yuwei Duan Rui Sun Yong Li Zhuang Xie Dongfang Xu Meizi Wu Youliang Wang Hongxiang Li Qunping Fan Yang Peng Yao Yao Chentong Liao Prof. Qiang Peng Prof. Shengzhong Liu Prof. Zhike 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 School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China School of Chemistry Xi'an Jiaotong University 710049 Xi'an P. R. China College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu 610059 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China

Organic self-assembled molecules (OSAMs) based hole-transporting materials play a pivotal role in achieving highly efficient and stable inverted perovskite solar cells (IPSCs). However, the reported carbazol-based OSAMs have serious drawbacks, such as poor wettability for perovskite solution spreading due to the nonpolar surface, worse matched energy arrangement with perovskite, and limited molecular species, which greatly limit the device performance. To address above problems, a novel OSAM [4-(3,6-glycol monomethyl ether-9H-carbazol-9-yl) butyl]phosphonic acid (GM-4PACz) was synthesized as hole-transporting material by introducing glycol monomethyl ether (GM) side chains at carbazolyl unit. GM groups enhance the surface energy of Indium Tin Oxide (ITO)/SAM substrate to facilitate the nucleation and growth of up perovskite film, suppress cation defects, release the residual stress at SAM/perovskite interface, and evaluate energy level for matching with perovskite. Consequently, the GM-4PACz based IPSC achieves a champion PCE of 25.52 %, a respectable open-circuit voltage ( V OC ) of 1.21 V, a high stability, possessing 93.29 % and 91.75 % of their initial efficiency after aging in air for 2000 h or tracking at maximum power point for 1000 h, respectively.

关键词： perovskite solar cells hole-transporting material inverted self-assemble molecule

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Amorphous Mo-Ta oxide nanotubes for long-term stable Mo oxide based supercapacitors

arXiv

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arXiv 2020年

作者： Jin, Bowen Hejazi, Seyedsina Pyczak, Florian Oehring, Michael Mohajernia, Shiva Kment, Stepan Tomanec, Ondrej Zboril, Radek Truong Nguyen, Nhat Yang, Min Schmuki, Patrik MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China Department of Materials Science Institute for Surface Science and Corrosion WW4-LKO University of Erlangen-Nuremberg Martensstraße 7 ErlangenD-91058 Germany Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH Max-Planck-Straße 1 Geesthacht21502 Germany Regional Centre of Advanced Technologies and Materials Palacky University Olomouc 17. Listopadu 50A Olomouc772 07 Czech Republic Department of Chemistry King Abdulaziz University Jeddah Saudi Arabia

With a large-scale usage of portable electric appliances, a high demand for increasingly high density energy storage devices has emerged. MoO3 has, in principle, a large potential as negative electrode material in supercapacitive devices, due to high charge densities that can be obtained from its reversible redox reactions. Nevertheless, the extremely poor electrochemical stability of MoO3 in aqueous electrolytes prevents a practical use in high capacitance devices. In this work, we describe how to overcome this severe stability issue by forming amorphous molybdenum oxide/tantalum oxide nanotubes by anodic oxidation of a Mo-Ta alloy. The presence of a critical amount of Ta-oxide (> 20 at-%) prevents the electrochemical decay of the MoO3 phase and thus yields an extremely high stability. Due to the protection provided by tantalum oxide, no capacitance losses are measureable after 10000 charging/discharging cycles. Copyright © 2020, The Authors. All rights reserved.

关键词： Tantalum oxides

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Molecule Passivation of Grain Boundaries for Ultra-Stable Perovskite Solar Cells

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Solar RRL 2022年第4期7卷

作者： Yuying Yao Jing Zhang Hang Su Yong Li Nan Li Ting Nie Lidan Liu Xiaodong Ren Ningyi Yuan Jianning Ding Shengzhong (Frank) Liu 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 Shaanxi 710119 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Yunnan Key Laboratory for Micro/Nano Materials & Technology International Joint Research Center for Optoelectronic and Energy Materials School of Materials and Energy Yunnan University Kunming Yunnan 650091 China School of Materials Science and Engineering Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology Changzhou University Changzhou 213164 China

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