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Acetylacetone-TiO_(2) Promoted large area Compatible Cascade Electron Transport Bilayer for Efficient Perovskite Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 221-228页

作者： Hyong Joon Lee Jin Kyoung Park Jin Hyuck Heo Sang Hyuk Im Department of Chemical and Biological Engineering Korea University145 Anam-ro Seongbuk-guSeoul 17104Korea

In designing efficient perovskite solar cells(PSCs),the selection of suitable electron transport layers(ETLs)is critical to the final device performance as they determine the driving force for selective charge ***_(2)nanoparticles(NPs)based ETLs have been a popular choice for PSCs due to superior electron mobility,but their relatively deep-lying conduction band energy levels(ECB)result in substantial potential ***,TiO_(2)NPs establish favorable band alignment owing to shallower ECB,but their low intrinsic mobility and abundant surface trap sites impede the final *** this reason,constructing a cascaded bilayer ETL is highly desirable for efficient PSCs,as it can rearrange energy levels and exploit on advantages of an individual *** this study,we prepare SnO_(2)NPs and acetylacetone-modified TiO_(2)(Acac-TiO_(2))NPs and implement them as bilayer SnO_(2)/Acac-TiO_(2)(BST)ETL,to assemble cascaded energy band ***_(2)contributes to rapid charge carrier transport from high electron mobility while Acac-TiO_(2)minimizes band-offset and effectively suppresses interfacial ***,the optimized BST ETL generates synergistic influence and delivers power conversion efficiency(PCE)as high as 23.14%with open-circuit voltage(V_(oc))reaching 1.14 ***,the BST ETL is transferred to a large scale and the corresponding mini module demonstrates peak performance of 18.39%PCE from 25 cm^(2)aperture ***,the BST-based mini module exhibit excellent stability,maintaining 83.1%of its initial efficiency after 1000 h under simultaneous 1 Sun light-soaking and damp heat(85℃/RH 85%)environment.

关键词： acetylacetone large area perovskite solar cells TiO_(2)

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Linear Plasma Sources for large area Film Deposition:A Brief Review

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Plasma Science and Technology 2014年第4期16卷 356-362页

作者：魏钰左潇陈龙威孟月东方世东沈洁舒兴胜 Institute of Plasma Physics Chinese Academy of Sciences

By utilization of different excitation power sources, linear plasma sources can be differentiated into DC, RF, VHF, microwave and dual frequency types. Through installing several linear plasma sources in parallel or adopting the so-called roll-to-roll （air-to-air） process, scale uniform linear plasma sources were realized and successfully applied to the deposition of large area uniform dielectric thin films, Furthermore, the magnetic field system can effectively reduce the recombination losses on the wall of the vacuum chamber and enhance the plasma density. Linear plasma sources with approximately one square meter deposition area with the plasma density of 1011 cm 3 have been developed, some of which have been used for the deposition of dielectric layers and large area plasma etching.

关键词： linear plasma sources large area uniform high density

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Direct vapor phase growth process and robust photoluminescence properties of large area MoS2 layers

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Nano Research 2014年第12期7卷 1759-1768页

作者： V. Senthilkumar Le C. Tam Yong Soo Kim Yumin Sim Maeng-Je Seong Joon. I. Jang Department of Physics and Energy Harvest Storage Research Center (EHSRC) University ofUIsan Ulsan 680-749 South Korea Department of Physics Applied Physics and Astronomy Binghamton University New York 13902 USA Department of Physics Chung-Ang University Seoul 156-756 South Korea

There has been growing research interest in the use of molybdenum disulfide in the fields of optoelectronics and energy harvesting devices, by virtue of its indirect-to-direct band gap tunability. However, obtaining large area thin films of MoS2 for future device applications still remains a challenge. In the present study, the amounts of the precursors （S and MOO3） were varied systematically in order to optimize the growth of highly crystalline and large area MoS2 layers by the chemical vapor deposition method. Careful control of the amounts of precursors was found to the key factor in the synthesis of large area highly crystalline flakes. The thickness of the layers was confirmed by Raman spectroscopy and atomic force microscopy. The optical properties and chemical composition were studied by photoluminescence （PL） and X-ray photoelectron spectroscopy. The emergence of strong direct excitonic emissions at 1.82 eV （A-exciton, with a normalized PL intensity of -55 × 10^3） and 1.98 eV （B-exciton, with a normalized PL intensity of -5 × 10^3） of the sample at room temperature clearly indicates the high luminescence quantum efficiency. The mobility of the films was found to be 0.09 cm^2/（V.s） at room temperature. This study provides a method for the controlled synthesis of high-quality two-dimensional （2D） transition metal dichalcogenide materials, useful for applications in nanodevices, optoelectronics and solar energv conversion.

关键词： molybdenum disulfide CVD growth large area Raman photo-luminescence field-effect ransistor (FET)

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Meniscus fabrication of halide perovskite thin films at high throughput for large area and low-cost solar panels

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International Journal of Extreme Manufacturing 2019年第2期1卷 73-86页

作者： Xuezeng Dai Yehao Deng Charles H Van Brackle Jinsong Huang Department of Applied Physical Sciences University of North CarolinaChapel HillNC 27599United States of America

Halide perovskites have rapidly attracted considerable attention due to unprecedented properties not seen in traditional *** addition to their optoelectronic merits,one advantage of perovskite materials is their solution processability,which opens the door to low-cost and high throughput solution coating strategies for the commercialization of perovskite solar cells(PSCs).Here we review perovskite film fabrication by meniscus coating—a simple and readily scalable manufacturing technique,including blade coating and slot-die *** outline the fundamental fluid mechanisms of meniscus coating,discuss drying and crystallization of perovskite in the coating process,and provide an overview of recent progress in meniscus-coated PSCs.

关键词： meniscus coating large area perovskite thin films

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large area flexible polymer solar cells with high efficiency enabled by imprinted Ag grid and modified buffer layer

Large area flexible polymer solar cells with high efficiency...

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第四届新型太阳能电池学术研讨会

作者： Shudi Lu Yang Sun Zhijie Wang Shengchun Qua Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of Sciences Department of Physics Hebei Normal University of Science&Technology

To take a full advantage of polymer semiconductors on realization of large-area flexible photovoltaic devices, herein, we fabricate polymer solar cells on the basis of polyethylene terephthalate(PET) with imprinted Ag grid as transparent *** key fabrication procedure is the adoption of a modified PEDOT:PSS(PH1000) solution for spin-coating the buffer layer to form a compact contact with the *** comparison with the devices with intrinsic PEDOT:PSS buffer layer, the advanced devices present a much higher efficiency of 6.51%, even in a large device area of 2.25 *** characterizations reveal that such devices show an impressive performance stability as the bending angle is enlarged to 180° and bending time is up to 1000 *** only providing a general methodology to construct high efficient and flexible polymer solar cells, this paper also involves deep insights on device working mechanism in bending conditions.

关键词： large area flexibility polymer solar cells buffer layer stability

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large-area perovskite films for PV applications:A perspective from nucleation and crystallization

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Journal of Energy Chemistry 2021年第8期30卷 626-641,I0013页

作者： Yuanhang Yang Zexu Xue Long Chen Cho Fai Jonathan Lau Zhiping Wang Key Lab of Artificial Micro-and Nano-Structures of Ministry of Education of China School of Physics and TechnologyWuhan UniversityWuhan 430072China Canadian Solar Inc. Suzhou 215129China School of Microelectronics Wuhan UniversityWuhan 430072China

Perovskite solar cells(PSCs)have attracted significant research interest due to the rapid rise in ***,a large efficiency gap still exists between laboratory-based small devices and industrialoriented large-scale *** of the main reasons for the efficiency losses is the degraded quality and morphology of the deposited large-area films,which is closely associated with crystallization *** this review,we discuss the nucleation and crystallization processes in solution and vaporbased up-scaling deposition methods for large-area perovskite *** review recent scientific achievements and technical developments that have been made in the field of large-area *** present the existing problems that limit the performance of large devices and extensively discuss the key influencing parameters from the perspective of nucleation and crystallization over large *** review highlights the importance of crystallization control in up-scaling fabrications and presents promising strategies towards large-area perovskite-based optoelectronic devices.

关键词： large area Perovskite solar cells Nucleation Crystallization Solution and vacuum processes

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large-area, Flexible Polymer Solar Cell Based on Silver Nanowires as Transparent Electrode by Roll-to-Roll Printing

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Chinese Journal of Polymer Science 2017年第2期35卷 261-268页

作者： Yi-fan Zhao Wen-jun Zou Huan Li 吕琨延卫魏志祥 Chinese Academy of Sciences Key Laboratory of Nanosystem and Hierarchical Fabrication Chinese Academy of Sciences Center for Excellence in Nanoscienee National Center for Nanoscience and Technology Beijing 100190 China Department of Environmental Science and Engineering Xi ＇an Jiaotong University Xi ＇an 700049 China

Conventional organic solar cell＇s （OSC） architectures, including rigid transparent substrate （Glass）, conductive electrode （Indium tin oxide, ITO） and small working areas, are widely utilized in organic photovoltaic fields. However, such a structure as well as conventional spin-coating method obviously restrict their industrial application. In this article, we report the deposition of silver nanowires （AgNWs） on the flexible substrate by slot-die printing. The obtained AgNWs films exhibited a high transmittance and a low resistance, and were further used as the transparent conductive electrode ofOSCs. A typical conjugated polymer, poly[（2-5-bis（2-hexyldecyloxy）phenylene）-alt-（5,6-difluoro-4,7-di（thiophen-2-yl）benzo[c] [1,2,5]thiadiazole）] （PPDT2FBT）, was used as the active material to fabricate large-area （7 cm2） solar cells by a slot-die coating process. The power conversion efficiency （PCE） could reach 1.87% initially and further increased to 3.04% by thermal annealing. Compared to the performance of reference cell on ITO substrate, the result indicated that the AgNWs could be developed as an alternative substitute of conductive electrode to fabricate the large-area flexible OSCs by roll-to-roll printing.

关键词： Polymer solar cell Silver nanowires Slot-die large area Flexible substrate

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large-area and highly uniform carbon nanotube film for nigh-performance thin film transistors

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Nano Research 2018年第8期11卷 4356-4367页

作者： Guodong Dong Jie Zhao Lijun Shen Jiye Xia Hu Meng Wenhuan Yu Qi Huang Hua Han Xuelei Liang Lianmao Peng Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics Peking University 8eijing 100871China Institute of Automation Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China BOE Technology Group Co. Ltd. Beijing 100176 China Guodong Dong and Jie Zhao contributed equally to this work.

Carbon nanotube thin film transistors （CNT-TFTs） are a potential TFT technology for future high-performance macroelectronics. Practical application of CNT-TFTs requires the production of large-area, highly uniform, density-controllable, repeatable, and high-throughput CNT thin films. In this stud35 CNT films were fabricated on 4-inch Si wafers and 2.5th generation （G2.5） backplane glasses （370 mm×470 ram） by dip coating using a chloroform-dispersed high-purity semiconducting CNT solution. The CNT density was controlled by the solution concentration and coating times, but was almost independent of the substrate lifting speed （1-450 ***-1）, which enables high-throughput CNT thin film production. We developed an image processing software to efficiently characterize the density and uniformity of the large-area CNT films. Using the software, we confirmed that the CNT films are highly uniform with coefficients of variance （Cv）〈 10% on 4-inch Si wafers and - 13.8% on G2.5 backplane glasses. High-performance CNT-TFTs with a mobility of 45-55 cm2-V-l.s-1 were obtained using the fabricated CNT films with a high-performance uniformity （Cv =11%-13%） on a 4-inch wafer. To our knowledge, this is the first fabrication and detailed characterization of such large-area, high-purity, semiconducting CNT films for TFT applications, which is a significant step toward manufacturing CNT-TFTs.

关键词： carbon nanotube thin film large area uniform transistor

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Growth of large-area aligned pentagonal graphene domains on high-index copper surfaces

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Nano Research 2016年第7期9卷 2182-2189页

作者： Kailun Xia Vasilii I. Artyukhov Lifei Sun Jingying Zheng Liying Jiao Boris I. Yakobson Yingying Zhang Department of Chemistry Tsinghua University Beijing 100084 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China Department of Materials Science and Nano Engineering Rice University Houston TX 77005 USA

Single-crystal graphene domains grown by chemical vapor deposition （CVD） intrinsically tend to have a six-fold symmetry; however, several factors can influence the growth kinetics, which can in turn lead to the formation of graphene with different shapes. Here we report the growth of oriented large-area pentagonal single-crystal graphene domains on Cu foils by CVD. We found that high-index Cu planes contributed selectively to the formation of pentagonal graphene. Our results indicated that lattice steps present on the crystalline surface of the underlying Cu promoted graphene growth in the direction perpendicular to the steps and finally led to the disappearance of one of the edges forming a pentagon. In addition, hydrogen promoted the formation of pentagonal domains. This work provides new insights into the mechanism of graphene growth.

关键词： pentagonal graphene copper foil high index plane chemical vapor deposition large area

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Realizing high efficiency and large-area sterilization by a rotating plasma jet device

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Plasma Science and Technology 2022年第4期24卷 133-146页

作者： Hua LI Minglei LI Hongcheng ZHU Yuhan ZHANG Xiaoxia DU Zhencheng CHEN Wenxiang XIAO Kun LIU School of Life and Environmental Sciences Guilin University of Electronic TechnologyGuilin 541004People's Republic of China The State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044People's Republic of China

By tilting a plasma jet and rotating 360°,a large-area can be scanned and sterilized in a short *** with the previous array device,this pipe has the significant advantages of high sterilization uniformity and low gas ***,a rotatable plasma jet device,which can control the swing and rotation of a jet pipe,is designed,and a corresponding theoretical model is established to guide the ***,with Staphylococcus aureus(***)and Escherichia coli(***)as the target bacteria,the device achieves a short sterilization time of 158 s—the minimum sterilization flow of *** and *** is 0.8 slm and 0.6 slm,*** device is compared with an array plasma sterilization device in terms of sterilization speed and gas *** results show that the device is not only better than an array plasma sterilization device with respect to scanning uniformity,but also far less than the array plasma sterilization device in gas consumption of 5 ***,the device has great potential in applications involving efficient,large-area sterilization.

关键词： low-temperature plasma sterilization rotate large area applications

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