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Major strategies for improving the performance of perovskite solar cells

iEnergy 2023年第3期2卷 172-199页

作者： Lixiu Zhang Hang Li Kai Zhang Wenzhe Li Chuantian Zuo George Omololu Odunmbaku Jingde Chen Cong Chen Luozheng Zhang Ru Li Yuping Gao Baomin Xu Jiangzhao Chen Yongsheng Liu Yang Wang Yanlin Song Jianxin Tang Feng Gao Qing Zhao Yong Peng Mingzhen Liu Lei Tao Yuelong Li Zhimin Fang Ming Cheng Kuan Sun Dewei Zhao Yixin Zhao Shihe Yang Chenyi Yi Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China State Key Laboratory of Power System Department of Electrical EngineeringTsinghua UniversityBeijing 100084China Shenzhen Graduate School Peking UniversityShenzhen 518055China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China College of Materials Science and Engineering&Engineering Research Center of Alternative Energy Materials&Devices Sichuan UniversityChengdu 610065China School of Energy&Power Engineer-ing Chongqing UniversityChongqing 400044China Institute for Energy Research Jiangsu UniversityZhenjiang 212013China Institute of New Energy Technology Department of Electronic EngineeringCollege of Information Science and TechnologyJinan UniversityGuangzhou 510631China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China College of Optoelectronic Engineering Chongqing UniversityChongqing 400044China College of Chemistry Nankai UniversityTianjin 300071China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-optoelec-tronics School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Photoelectronic Thin Film Devices and Technology Nankai UniversityTianjin 300350China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

Metal halide perovskite solar cell(PSC)has successfully distinguished itself in optoelectronic field by virtue of the sharp rise in power conversion efficiency over the past *** remarkable efficiency breakthrough at such a fast speed can be mainly attributed to the comprehensive study on film deposition techniques,especially the effective management of surface and interfacial defects in recent ***,we summarized the current trends in performance enhancement for PSCs,with a focus on the generally applicable strategies in high-performance works,involving deposition methods,compositional engineering,additive engineering,crystallization manipulation,charge transport material selection,interfacial passivation,optical coupling effect and constructing tandem solar *** directions and perspectives are also provided.

关键词： Perovskite solar cells efficiency improvement strategies milestones

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Highly Transparent and Adhesive Poly(vinylidene difluoride)Films for Self-Powered Piezoelectric Touch Sensors

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Chinese Journal of Polymer science 2022年第7期40卷 726-737页

作者： Qing-Qing Li Guang-Kuo Wang Zi-Xu Liang Zhi-Jun Hu School of Optoelectronic Science and Engineering&Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow UniversitySuzhou215006China Center for Soft Condensed Matter Physics and Interdisciplinary Research Soochow UniversitySuzhou215006China Soochow University Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province&Key Lab of Modern Optical Technologies of Education Ministry of ChinaSuzhou215006China

With the rapid development of internet of things,self-powered touch sensors made of piezoelectric fluorinated polymers have attracted significant interest because they can constantly convert mechanical energy into electrical energy without external power ***,it is still challenging to fabricate fluorinated polymer films with good adhesion and high output performance with a large-scale and low-cost method while maintaining high transparency,which are extremely important for simultaneous optical detection and electromechanical *** this work,we demonstrate that the incorporation of a molecular ferroelectric-dabcoHReO_(4)(DH)into poly(vinylidene difluoride)(PVDF)solution enables high-throughput and low-temperature processing of flexible and transparent piezoelectric films by scalable processing *** effects of multiaxial DH are ***,DH can trigger the phase transition of PVDF fromα-toβ-phase and realize the orderly orientation of PVDF,which guarantees higher piezoelectric performance without any additional electrical poling ***,the hydrophilic nature of DH can improve the adhesion properties of PVDF,which in turn improve the stability and durability of the *** optimizing the fabrication processes,the transmittance of the piezoelectric touch sensors based on PVDF films and Ag nanowires coated poly(ethylene terephthalate)electrodes can be higher than 94%.The piezoelectric voltage constant g;of the transparent films can reach to 1.2 V·m·N;,which is at least three times higher than the commercially available PVDF films obtained by *** results indicate that the flexible piezoelectric sensors have potential applications in transparent electronic devices for mechanical sensing and energy harvesting.

关键词： PVDF Transparent Adhesive Large scale Piezoelectric sensor

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In Suit Decorating Pdpt Bimetals on Titanium Dioxide Nanosheets for Detecting Ppb Level of Carbon Monoxide and Hydrogen

SSRN

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SSRN 2024年

作者： Li, Gaojie Wang, Xinxin Li, Quanan Xu, Jiaqiang School of Materials Science and Engineering Henan University of Science and Technology Henan Luoyang471023 China School of Physics and Engineering Henan University of Science and Technology Henan Luoyang471023 China NEST Lab Department of Physics Department of Chemistry College of Science Shanghai University Shanghai200444 China

The catalyst with strong metal-support interactions often exhibits high catalytic activity. This study aims to prepare sensitive materials with strong metal-MOS interactions and explore their sensitization mechanism. Sn-PdPt/TiO2 was obtained by in-situ decorating PdPt bimetals on the surface of TiO2 NSs using Sn2+ as the reducing agent, and PdPt/TiO2 was prepared by traditional reduction method. Compared with TiO2 sensor, PdPt/TiO2 and Sn-PdPt/TiO2 sensors exhibited higher sensitivity, selectivity, lower working temperature (200°C) and detection limit (ppb level) to CO and H2. The sensitization of PdPt bimetal to TiO2 should be ascribed to the high catalytic activity of PdPt bimetal towards O2, H2 and CO, Schottky barrier at the interface between TiO2 and PdPt NPs, and the multiple valence states (Pd0, Pd2+ and Pd4+) of Pd will undergo mutual transformation during gas sensing reactions. And Sn-PdPt/TiO2 sensor exhibited higher sensitivity, selectivity and better stability than those of PdPt/TiO2 sensor, which can be attributed to the introduction of SnO2 and the stronger interaction between PdPt and TiO2 due to the in-situ reduction reaction. This study can provide some reference for preparing the MOS based gas sensing materials with strong metal-support interactions and understanding the sensitization mechanism of PdPt bimetal. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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Determining the contribution of Mo single atoms components in MoO_(2)nanocatalyst in transfer hydrogenation

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Nano Research 2023年第2期16卷 2302-2310页

作者： Ze-Nan Hu Yongjian Ai Yan Zhao Yiming Wang Kelong Ding Wenhui Zhang Rongxiu Guo Xinyue Zhang Xiangbin Cai Ning Wang Jianshe Hu Qionglin Liang Hongyang Liu Fei Huang Limin Wu Jiangwei Zhang Hong-bin Sun School of Environmental Engineering and Chemistry Luoyang Institute of Science and TechnologyLuoyang 471023China Department of Chemistry Northeastern UniversityShenyang 110819China MOE Key Laboratory of Bioorganic Phosphorus Chemistry&Chemical Biology Beijing Key Lab of Microanalytical Methods&InstrumentationDepartment of ChemistryCenter for Synthetic and Systems BiologyTsinghua UniversityBeijing 100084China College of Energy Material and Chemistry Inner Mongolia UniversityHohhot 010021China Department of Physics and Center for Quantum Materials Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Nanocatalysts are likely to contain undetected single-atom components,which may have been ignored but have significant effect in catalytic ***,we report a catalyst composed of Mo single atoms(SAs)and MoO_(2)nanoparticles(NPs)(MoSAs-MoO_(2)@NC),which is an exact model to understand how the SAs contribute to the *** experimental results and the density functional theory calculations reveal that Mo SAs on nitrogen-doped carbon provides the reaction zone for nitro reduction,while MoO_(2)is the active site for decomposing hydrazine hydrate to produce H*.Thanks to the synergy between Mo SAs and MoO_(2)NPs,this catalyst exhibits noble metal-like catalytic activity(100%conversion at 4 min)for the dechlorination-proof transfer ***,the hydrogen migration on the catalyst is verified by the electrochemical tests in the absence of a hydrogen *** work provides a model for further study on the coexistence of single atoms in nanoparticle catalysts.

关键词： synergistic effect Mo single atoms MoO_(2)nanocatalyst transfer hydrogenation nitroarenes

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Detector development at the Back-n white neutron source

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Radiation Detection technology and Methods 2023年第2期7卷 171-191页

作者： Fan Ruirui Li Qiang Bao Jie Li Yang Liu Rong Jiang Wei Ren Jie Zhang Qiwei Cao Ping Gu Minhao Ren Zhizhou Yi Han Tang Jingyu An Qi Bai Haofan Bai Jiangbo Chen Qiping Chen Yonghao Chen Zhen Cui Zengqi Fan Anchuan Feng Changqing Feng Fanzhen Gao Keqing Han Changcai Han Zijie He Guozhu He Yongcheng Hong Yang Hu Yiwei Huang Hanxiong Jia Weihua Jiang Haoyu Jiang Zhijie Jin Zhengyao Kang Ling Li Bo Li Chao Li Gong Li Jiawen Li Xiao Liu Jie Liu Shubin Luan Guangyuan Ning Changjun Qi Binbin Ruan Xichao Song Zhaohui Sun Kang Tan Zhixin Tang Shengda Wang Pengcheng Wang Zhaohui Wen Zhongwei Wu Xiaoguang Wu Xuan Xie Likun Yang Yiwei Yu Yongji Zhang Guohui Zhang Linhao Zhang Mohan Zhang Xianpeng Zhang Yuliang Zhang Yue Zhang Zhiyong Zhao Maoyuan Zhou Luping Zhou Zhihao Zhu Kejun The CSNS Back-n Collaboration Institute of High Energy Physics CASBeijing 100049People’s Republic of China Spallation Neutron Source Science Center Dongguan 523803People’s Republic of China State Key Laboratory of Particle Detection and Electronics Beijing 100049People’s Republic of China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413People’s Republic of China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900People’s Republic of China Department of Modern Physics University of Science and Technology of ChinaHefei 230026People’s Republic of China State Key Laboratory of Particle Detection and Electronics Hefei 230026People’s Republic of China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871People’s Republic of China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026People’s Republic of China Northwest Institute of Nuclear Technology Xi’an 710024People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China 不详

Purpose Back-n is a white neutron beamline at China spallation neutron source,which was established in the year of *** is a powerful facility for nuclear data measurement,neutron detector calibration,and radiation effect *** A series of detectors were built for different experiments,including beam monitoring,beam profile measurement,neutron induced secondaries(fission fragments,light charged particles and gamma)cross section measurement,and neutron resonance radiography,etc.A common digitization electronics and a cluster-based DAQ were developed for these detector *** detectors have been employed at Back-n and serviced for experiments from the beginning of the beamline *** and conclusion As an overview of detectors of Back-n,the details of the detector design and the experiment performing are described in this *** developing systems,e.g.,MTPC and B-MCP,are also included.

关键词： White neutron source Beam diagnostics Fission fragment Charged particle Gamma Neutron resonance radiography

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Crystal Symmetry Selected Pure Spin Photocurrent in Altermagnetic Insulators

arXiv

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arXiv 2024年

作者： Dong, Ruizhi Cao, Ranquan Tan, Dian Fei, Ruixiang School of Physics Beijing Institute of Technology Beijing100081 China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement Ministry of Education Beijing Institute of Technology Beijing100081 China Shenzhen Institute for Quantum Science and Engineering Department of Physics Southern University of Science and Technology Shenzhen518055 China

The generation of time-reversal-odd spin-current in metallic altermagnets has attracted considerable interest in spintronics. However, producing pure spin-current in insulating materials remains both challenging and desirable, as insulating states are frequently found in antiferromagnets. Nonlinear photogalvanic effects offer a promising method for generating spin-current in insulators. We here revealed that spin and charge photocurrents in altermagnets are protected by spin point group symmetry. Unlike the photocurrents in parity-time symmetric materials, where spin-orbit coupling (SOC) induces a significant charge current, the spin-current in altermagnets can exist as a pure spin current along specific crystal directions regardless of SOC. We applied our predictions using first-principles calculations to several distinct materials, including wurtzite MnTe and multiferroic BiFeO3. Additionally, we elucidated the previously overlooked linear-inject-current mechanism in BiFeO3 induced by SOC, which may account for the enhanced bulk photovotaic effect in multiferroics. © 2024, CC BY.

关键词： Crystal symmetry

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Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

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science China(physics,Mechanics & Astronomy) 2022年第7期65卷 48-82页

作者： DongShi Zhang ZhuGuo Li ChangHao Liang Shanghai Key Laboratory of Materials Laser Processing and Modification School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Diverse nanomaterials, in the forms of carbides, sulfides, oxides, metals, hydroxides, etc., have been synthesized by laser ablation in liquids(LAL) with metal targets as the dominant educts. Many advantages of LAL technique itself and its products have been revealed since 1983 when the first report about LAL was released. Different from traditional wet-chemical synthesis,one unique feature of LAL is its resultant extreme high-temperature and high-pressure local environment for the nucleation and growth of nanomaterials, despite being performed at room temperature. This extreme condition can induce the atomization and ionization of the target materials and liquid molecules to incur different chemical reactions. The laser, liquid, liquid additive, and target can significantly alter the local environment in a broad range. Thus, different phases and shapes of nanomaterials are producible even from the same target. Through directly comparing the products of LAL of 13 kinds of chosen representative metals synthesized under different conditions, this review presents and discusses current understandings, challenging issues, and perspectives related to the diversity of LAL-products, which is willing to promote a deeper investigation and discussion on a clear clarification of the chemical reactions and particle nucleation/growth processes.

关键词： nanomaterial synthesis laser ablation in liquid phase manipulation morphology diversity

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The low temperature growth of stable p-type ZnO films in HiPIMS

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Plasma science and technology 2021年第9期23卷 154-162页

作者： Qian LI Minju YING Zhongwei LIU Lizhen YANG Qiang CHEN Lab of Plasma Physics and Materials Beijing Institute of Graphic CommunicationBeijing 102600People's Republic of China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875People's Republic of China

In this study,the influence of substrate temperature on properties of Al-N co-doped p-type ZnO films is *** from the high ionization rate in high-power impulsed magnetron sputtering,the concentration of ionized nitrogen N+and ionized zinc Zn+were increased,which promoted the formation of ZnO films and lowered the necessary substrate *** optimization,a co-doped p-type ZnO thin film with a resistivity lower than 0.35Ωcm and a hole concentration higher than 5.34×10^(18)cm^(-3)is grown at 280°C.X-ray diffraction results confirm that Al-N co-doping does not destruct the ZnO wurtzite structure.X-ray photoelectron spectroscopy demonstrates that the presence of Al promotes the formation of acceptor(No)defects in ZnO films,and ensures the role of Al in stabilizing p-type ZnO.

关键词： HiPIMS Al-N co-doped ZnO film substrate temperature p-type conduction N+/N2+

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Lithium film with abundant stepped structures: A promising route for homogeneous Li ion deposition to conquer lithium dendrite issue and its action mechanism

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Journal of Energy Chemistry 2022年第9期31卷 166-175,I0006页

作者： Yong Zhang Shu-Qin Song Yong Gao Tian-Fu Liu Hong Zhao Department of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028LiaoningChina The Key Lab of Low-carbon Chemistry&Energy Conservation of Guangdong Province PCFM LabSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou510275GuangdongChina Institute of Science and Technology for New Energy Xi'an Technological UniversityXian 710021ShaanxiChina Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023LiaoningChina

Lithium is considered to be the ‘‘holy grail” for the application of energy storage due to its highest theoretical capacity and lowest anode potential. However, one of the grand difficulties in the development of lithium-based batteries is the lithium dendrite growth that leads to capacity fading and electrode degradation over long-term cycling. Compared with conventional electrolyte modifications, artificial solid electrolyte interfaces(SEI) synthesis and framework designing approaches, tuning surface morphology of lithium anode is the direct route to induce homogeneous Li ion deposition. Due to the high chemical activity of lithium metal, however, controllable growth of lithium micro/nanostructures by traditionally chemical approaches is still a big challenge. Herein, we have developed a facile compression route to fabricate lithium anode with abundant stepped lithium structures. The electrochemical results demonstrate that the dendritic growth issue is effectively suppressed by orderly arranged stepped lithium structures. After 90 cycles, a high discharge capacity of 954 mAh g^(-1) is achieved, which is 2.7times that of the uncompressed lithium anode(342 mAh g). First-principles calculations reveal that the orderly arranged stepped lithium structures are lithiophilic active sites to adsorb Li ion, which contributes to homogeneous deposition of Li ion on lithium anode, eventually solving the lithium dendrite issue. This work paves a new road to suppress dendritic growth, which will provide some new ideas to design long recycling sodium, potassium and zinc, and other metal anode batteries.

关键词： Lithium dendrite Steps/edges Active sites Compression

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Large Scale Fabrication of Polysiloxane Thin Film with High-Efficienct Atomic Oxygen Resistance using PECVD Process

Large Scale Fabrication of Polysiloxane Thin Film with High-...

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第10届亚洲和澳大利亚真空与表面科学会议、中国真空学会2021学术年会、第十五届国际真空科学与工程应用学术会议

作者： Yi Li Zhonghua Li Yanchun He Detian Li Science and Technology on Vacuum Technology and Physical Laboratory Lanzhou Institute of Physics

Atomic oxygen (AO) resistant thin films have broad application prospects in the protective materials of low Earth orbit ***,large-scale fabricating of AO protective coatings on flexible polymers with ultraefficient AO... 详细信息

关键词： Low earth orbit Atomic oxygen Plasma-enhanced chemical vapor deposition Hexamethyldisiloxane Polysiloxane thin film

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