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Enlarging grain sizes for efficient perovskite solar cells by methylamine chloride assisted recrystallization

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Journal of Energy Chemistry 2022年第2期31卷 55-61页

作者： Gao Wu Molang Cai Yujia Cao Zhuoxin Li Zhongyan zhang Weng Yang Xianggang Chen Dongxu Ren Yaqi Mo Miao Yang Xuepeng Liu songyuan Dai State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China Beijing Key Laboratory of Novel Thin-Film Solar Cells North China Electric Power UniversityBeijing 102206China Jiangsu Shunfeng Photovoltaic Technology Co.Ltd. Changzhou 213164JiangsuChina

The quality of MAPbI3 film prepared by solvent engineering process highly depends on environment and antisolvent ***,we provided a simple methylamine chloride(MACl)solution treatment using a two-step process to enlarge the perovskite crystal grain sizes to more than 1 *** than treatment on the film surface,the MACl solution diffuses into the MAPbI_(3) films to assist the recrystallization of small crystal at the bottom of perovskite *** imitative contact between perovskite and substrate is ***,the enlargement of grain size and ten times enhancement of crystalline reduce trap-assisted recombination of perovskite ***,the significant improvement of cell efficiency of 20.89%as well as device stability is obtained with the MACl treatment.

关键词： Perovskite solar cells Methylamine chloride Large grain size High efficiency

In-situ grown CuO_(x)nanowire forest on copper foam:A 3D hierarchical and freestanding electrocatalyst with enhanced carbonaceous product selectivity in CO_(2)reduction

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Nano Research Energy 2022年第3期1卷 44-51页

作者： Wenjun zhang Minghang Jiang songyuan Yang Yi Hu Bin Mu Zuoxiu Tie Zhong Jin MOE Key Laboratory of Mesoscopic Chemistry MOE Key Laboratory of High Performance Polymer Materials and TechnologyJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Nanjing Tieming Energy Technology Co.Ltd. Nanjing 210093China Suzhou Tierui New Energy Technology Co.Ltd. Suzhou 215228China School for Engineering of Matter Transportand EnergyArizona State University501 East Tyler MallTempeAZ 85287USA

Electrocatalytic carbon dioxide(CO_(2))reduction is considered as an economical and environmentally friendly approach to neutralizing and recycling greenhouse gas CO_(2).However,the design of preeminent and robust electrocatalysts for CO_(2)electroreduction is still ***,we report the in-situ growth of dense CuO_(x)nanowire forest on 3D porous Cu foam(CuO_(x)-NWF@Cu-F),which can be directly applied as a freestanding and binder-free working electrode for highly effective electrocatalytic CO_(2)*** adjusting the surface morphology and chemical composition of CuO_(x)nanowires via surface reconstruction,large electrochemically active surface area and abundant Cu(+1)sites were generated,leading to remarkable activity for CO_(2)*** as-prepared hierarchical conductive electrode exhibited an enhanced Faradaic efficiency of 15.0%for ethanol formation(FE_(C_(2)H_(5)OH))and a total Faradaic efficiency of 69.4%for all carbonaceous compounds(FE_(C-total))at a mild applied potential of–0.45 V *** in 0.1 M KHCO_(3)*** achieved a 4-fold increase in FE_(C-total)than that of Cu nanowire forest supported on 3D porous Cu foam(Cu-NWF@Cu-F)obtained by in-situ reduction of the CuO_(x)-NWF@Cu-F via annealing at H_(2)atmosphere,and thereby effectively suppressed the hydrogen evolution side-reaction.

关键词： electrocatalytic CO_(2)reduction CuO_(x)nanowire forest 3D hierarchical nanostructure surface reconstruction enhanced carbonaceous product selectivity

Ultrasound-guided microwave ablation for symptomatic adenomyosis:More areas of concern for more uniform and promising outcomes

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Journal of Interventional Medicine 2022年第3期5卷 122-126页

作者： Huili zhang songyuan Yu Huixiong Xu Department of Medical Ultrasound Shanghai Tenth People's HospitalUltrasound Researchand Education InstituteSchool of MedicineTongji UniversityShanghai200072China National Clinical Research Center of Interventional Medicine Shanghai 200072China Department of Ultrasound Zhongshan HospitalFudan UniversityShanghai200032PR China

Adenomyosis is a common gynecological disease in reproductive women,which causes serious dysmenorrhea,menorrhagia,anemia,and infertility,and has a serious impact on the physical and mental health of *** that the efficacy of the traditional medication and surgical treatment is not ideal,an increasing number of patients are searching for more effective and less invasive ***(US)-guided microwave ablation(MWA)has emerged as a new effective and minimally invasive alternative treatment for symptomatic adenomyosis,and it is widely being used in clinical *** studies have proven that it is an efficient and safe treatment modality for symptomatic adenomyosis,but a significant variance in clinical outcomes reported in previous studies was also ***,we have analyzed the potential causes of this problem from the aspects of the diagnosis of adenomyosis,symptom evaluation before ablation,steps of USguided ablation treatment,and outcome evaluation after ***,the clinical problems existing in the ablation treatment of adenomyosis are discussed,and the directions of future research are pointed out.

关键词： Ultrasound-guided microwave ablation Adenomyosis

BiVO_4 semiconductor sensitized solar cells

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Science China Chemistry 2015年第9期58卷 1489-1493页

作者： Yi Li Jun Zhu Hui Chu Junfeng Wei Feng Liu Mei Lv Junwang Tang Bing zhang Jianxi Yao Zhipeng Huo Linhua Hu songyuan Dai CAS Key Laboratory of Novel Thin Film Solar Cells Institute of Applied Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Department of Modern Physics University of Science and Technology of China Department of Chemical Engineering University College London State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing Key Lab of Novel Thin Film Solar Cells

Semiconductor sensitized solar cells(SSSCs) are promising candidates for the third generation of cost-effective photovoltaic solar cells and it is important to develop a group of robust, environment-friendly and visible-light-responsive semiconductor sensitizers. In this paper, we first synthesized bismuth vanadate(Bi VO4) quantum dots by employing facile successive ionic layer adsorption and reaction(SILAR) deposition technique, which we then used as a sensitizer for solar energy conversion. The preliminary optimised oxide SSSC showed an efficiency of 0.36%, nearly 2 orders of magnitude enhancement compared with bare Ti O2, due to the narrow bandgap absorption of Bi VO4 quantum dots and intimate contact with the oxide substrate. This result not only demonstrates a simple method to prepare Bi VO4 quantum dots based solar cells, but also provides important insights into the low bandgap oxide SSSCs.

关键词： solar cells bismuth vanadate successive ionic layer adsorption reaction deposition sensitizer

Highly Efficient and Stable FAPbI_(3) Perovskite Solar Cells and Modules Based on Exposure of the(011)Facet

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Nano-Micro Letters 2023年第9期15卷 164-174页

作者： Kai zhang Bin Ding Chenyue Wang Pengju Shi Xianfu zhang Cheng Liu Yi Yang Xingyu Gao Rui Wang Li Tao Keith G.Brooks songyuan Dai Paul J.Dyson Mohammad Khaja Nazeeruddin Yong Ding Beijing Key Laboratory of Novel Thin-Film Solar Cells North China Electric Power UniversityBeijing 102206People’s Republic of China Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne(EPFL)Lausanne 1015Switzerland Shanghai Synchrotron Radiation Facility(SSRF) Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204People’s Republic of China School of Engineering Westlake University and Institute of Advanced TechnologyWestlake Institute for Advanced StudyHangzhou 310024People’s Republic of China Hubei Yangtze Memory Laboratories Wuhan 430205People’s Republic of China School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

Perovskite crystal facets greatly impact the performance and stability of their corresponding photovoltaic *** to the(001)facet,the(011)facet yields better photoelectric properties,including higher conductivity and enhanced charge carrier ***,achieving(011)facet-exposed films is a promising way to improve device ***,the growth of(011)facets is energetically unfavorable in FAPbI_(3) perovskites due to the influence of methylammonium chloride ***,1-butyl-4-methylpyridinium chloride([4MBP]Cl)was used to expose(011)***[4MBP]^(+)cation selectively decreases the surface energy of the(011)facet enabling the growth of the(011)***[4MBP]^(+)cation causes the perovskite nuclei to rotate by 45°such that(011)crystal facets stack along the out-of-plane ***(011)facet has excellent charge transport properties and can achieve better-matched energy level *** addition,[4MBP]Cl increases the activation energy barrier for ion migration,suppressing decomposition of the *** a result,a small-size device(0.06 cm2)and a module(29.0 cm2)based on exposure of the(011)facet achieved power conversion efficiencies of 25.24%and 21.12%,respectively.

关键词： Renewable energy Perovskite solar cell Perovskite solar module Facet engineering

Estimating leaf mercury content in Phragmites australis based on leaf hyperspectral reflectance

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Ecosystem Health and Sustainability 2020年第1期6卷 240-250,239页

作者： Weiwei Liu Mengjie Li Manyin zhang DaanWang Ziliang Guo songyuan Long Si Yang Henian Wang Wei Li Yukun Hu Yuanyun Wei Hongye Xiao Institute of Wetland Research Chinese Academy of ForestryBeijingChina Beijing Key Laboratory of Wetland Services and Restoration BeijingChina cHengshuihu National Wetland Ecosystem Research Station HengshuiHebeiChina Hanshiqiao National Wetland Ecosystem Research Station BeijingChina

Introduction:Highmercury(Hg)concentrations affect the chlorophyll in leaves,therebymodifying leaf *** is a promising technique for the rapid,nondestructive evaluation of leaf Hg *** this study,we investigated Hg contents and reflective hyperspectra of reed leaves(Phragmites communis)in a gold mining(Jilin province,China).Spectral parameters sensitive to Hg content were identified through basic spectral transformations,continuous wavelet transformation(CWT),and spectral indices *** Hg inversion models were developed using stepwise multiple linear regression,partial least squares regression,and random forest ***:The results indicated that:1)leaf Hg content decreased with increasing distance from the mine:Jiapigou(JPG)>Erdaocha(EDC)>Laojingchang(LJC)>Erdaogou(EDG)>Lingqian(LQ)>Weishahe(WSH).2)Hg–sensitive wavelengths were primarily in the visible region;CWT increased the correlation between hyperspectral data and leaf Hg content,and improved the regression and accuracy of inversion;3)the continuumremoval–CWT–stepwise multiple linear regression was better for estimating low leaf Hg content;while the differential spectral index–partial least squares regression was better for estimating high leaf Hg ***:These hyperspectral inversion methods could be used for rapid,nondestructive monitoring of wetland plants.

关键词： Mercury pollution reed leaf hyperspectrum inversion model nondestructive monitoring

The Main Progress of Perovskite Solar Cells in 2020-2021

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Nano-Micro Letters 2021年第10期13卷 113-130页

作者： Tianhao Wu Zhenzhen Qin Yanbo Wang Yongzhen Wu Wei Chen Shufang zhang Molang Cai songyuan Dai Jing zhang Jian Liu Zhongmin Zhou Xiao Liu Hiroshi Segawa Hairen Tan Qunwei Tang Junfeng Fang Yaowen Li Liming Ding Zhijun Ning Yabing Qi Yiqiang zhang Liyuan Han State Key Laboratory of Metal Matrix Composites School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Centre Shanghai Key Laboratory of Functional Materials ChemistryJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyMeilong Road 130Shanghai 200237People’s Republic of China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyLuoyu Road 1037Wuhan 430074People’s Republic of China College of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094People’s Republic of China Beijing Key Laboratory of Novel Thin-Film Solar Cells and State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power UniversityBeijing 102206People’s Republic of China Department of Microelectronic Science and Engineering Ningbo UniversityZhejiang 315211People’s Republic of China College of Chemical Engineering Jiangsu Key Lab of Biomass-Based Green Fuels and ChemicalsNanjing Forestry UniversityNanjing 210037People’s Republic of China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042People’s Republic of China Special Division of Environmental and Energy Science Komaba Organization for Educational Excellence(KOMEX)College of Arts and SciencesUniversity of TokyoTokyo 153-8902Japan National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093People’s Republic of China College of Information Science and Technology Jinan UniversityGuangzhou 510632People’s Republic of China School of Physics and Electronic Science Engineering Research Center of Nan

Perovskite solar cells(PSCs)emerging as a promising photovoltaic technology with high efficiency and low manufacturing cost have attracted the attention from all over the *** the efficiency and stability of PSCs have increased steadily in recent years,and the research on reducing lead leakage and developing eco-friendly lead-free perovskites pushes forward the commercialization of PSCs step by *** review summarizes the main progress of PSCs in 2020 and 2021 from the aspects of efficiency,stability,perovskite-based tandem devices,and lead-free ***,a brief discussion on the development of PSC modules and its challenges toward practical application is provided.

关键词： Perovskite solar cells Stability Solar module Perovskite-based tandem devices Lead-free perovskite

Controlled thermally-driven mass transport in carbon nanotubes using carbon hoops

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Chinese Physics B 2024年第4期33卷 66-69页

作者：李耀隆李松远王美芬张任良 Hebei Key Laboratory of Mechanical Reliability for Heavy Equipment and Large Structures Yanshan UniversityQinhuangdao 066004China School of Civil Engineering and Mechanics Yanshan UniversityQinhuangdao 066004China

Controlling mass transportation using intrinsic mechanisms is a challenging topic in ***,we employ molecular dynamics simulations to investigate the mass transport inside carbon nanotubes(CNT)with temperature gradients,specifically the effects of adding a static carbon hoop to the outside of a CNT on the transport of a nanomotor inside the *** reveal that the underlying mechanism is the uneven potential energy created by the hoops,i.e.,the hoop outside the CNT forms potential energy barriers or wells that affect mass transport inside the *** fundamental control of directional mass transportation may lead to promising routes for nanoscale actuation and energy conversion.

关键词： molecular dynamics thermal drive nanotube hoop mass transport

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面向校园网的IPv6网流量成分分析

深圳大学学报（理工版） 2020年第S01期37卷 6-12页

作者：莫松源丁伟张艳东南大学网络空间安全学院江苏南京211189

对IPv6网的流量成分进行分类有助于更好掌控IPv6网络的流量行为和应用行为.本研究基于接入CERNET和CERNET2南京主节点网络的3个校园网原始流量,利用开源软件nDPI完成对流量的初步识别,设计并实现P2P流量分类器,对nDPI不能识别的流量进行... 详细信息

对IPv6网的流量成分进行分类有助于更好掌控IPv6网络的流量行为和应用行为.本研究基于接入CERNET和CERNET2南京主节点网络的3个校园网原始流量,利用开源软件nDPI完成对流量的初步识别,设计并实现P2P流量分类器,对nDPI不能识别的流量进行P2P识别.测试结果表明,该分类器可以大幅降低IPv6流量中的未知流量占比.进一步利用已有加密视频分类器识别HTTP/TLS未知应用层协议流中视频流量.利用nDPI和两个分类器对同期采集的上述3个校园网的IPv6与IPv4流量数据进行分类和对比分析,结果表明,流量中的P2P成分是造成IPv4与IPv6网络流量成分差异的主要原因,并分析P2P应用在两类网络中的差异.

关键词：计算机网络 IPV6 流量行为 P2P 流量识别流量分类