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Manipulating the Macroscopic and Microscopic Morphology of Large-Area Gravure-Printed ZnO Films for High-Performance flexible organic solar cells

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Energy & Environmental Materials 2024年第2期7卷 229-239页

作者： Zhenguo Wang Jingbo Guo Yaqin Pan Jin Fang Chao Gong Lixin Mo Qun Luo Jian Lin Changqi Ma School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China i-Lab&Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Suzhou 215123China Beijing Engineering Research Center of Printed Electronics Beijing Institute of Graphic CommunicationBeijing 102600China Jiangxi Institute of Nanotechnology Chinese Academy of Sciences(CAS)Nanchang 330200China

Gravure printing is a promising large-scale fabrication method for flexible organic solar cells(FOSCs)because it is compatible with two-dimension patternable roll-to-roll ***,the unsuitable rheological property of ZnO nanoinks resulted in unevenness and looseness of the gravure-printed ZnO interfacial *** we propose a strategy to manipulate the macroscopic and microscopic of the gravure-printed ZnO films through using mixed solvent and poly(vinylpyrrolidone)(PVP)*** regulation of drying speed effectively manipulates the droplets fusion and leveling process and eliminates the printing ribbing structure in the macroscopic *** additive of PVP effectively regulates the rheological property and improves the microscopic compactness of the *** this method,large-area ZnO∶PVP films(28×9 cm^(2))with excellent uniformity,compactness,conductivity,and bending durability were *** power conversion efficiencies of FOSCs with gravure-printed AgNWs and ZnO∶PVP films reached 14.34%and 17.07%for the 1 cm^(2)PM6:Y6 and PM6∶L8-BO flexible *** efficiency of 17.07%is the highest value to date for the 1 cm^(2)*** use of mixed solvent and PVP addition also significantly enlarged the printing window of ZnO ink,ensuring high-quality printed thin films with thicknesses varying from 30 to 100 nm.

关键词： flexible organic solar cell gravure printing large-area flexible interfacial layer rheology properties zinc oxide

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Solution‑Processed Transparent Conducting Electrodes for flexible organic solar cells with 16.61% Efficiency

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Nano-Micro Letters 2021年第3期13卷 39-52页

作者： Juanyong Wan Yonggao Xia Junfeng Fang Zhiguo Zhang Bingang Xu Jinzhao Wang Ling Ai Weijie Song Kwun Nam Hui Xi Fan Yongfang Li Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201People’s Republic of China School of Physics and Electronics Science Engineering Research Center of Nanophotonics and Advanced InstrumentMinistry of EducationEast China Normal UniversityShanghai 200241People’s Republic of China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitution of ChemistryChinese Academy of SciencesBeijing 100190People’s Republic of China Nanotechnology Center Institute of Textiles and ClothingThe Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China Department of Material Science and Engineering Hubei UniversityWuhan 430062People’s Republic of China State Key Laboratory of organic/Inorganic Composites Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao SAR 999078People’s Republic of China

Nonfullerene organic solar cells(OSCs)have achieved breakthrough with pushing the efficiency exceeding 17%.While this shed light on OSC commercialization,high-performance flexible OSCs should be pursued through solution ***,we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid(CF3SO3H).Through a low-concentration and low-temperature CF3SO3H doping,the conducting polymer anodes exhibited a main sheet resistance of 35Ωsq−1(minimum value:32Ωsq−1),a raised work function(≈5.0 eV),a superior wettability,and a high electrical *** high work function minimized the energy level mismatch among the anodes,hole-transporting layers and electron-donors of the active layers,thereby leading to an enhanced carrier *** solution-processed flexible OSCs yielded a record-high efficiency of 16.41%(maximum value:16.61%).Besides,the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85°C,demonstrating a high flexibility and a good thermal stability.

关键词： Solution-processed transparent conducting electrode flexible organic solar cell PEDOT:PSS Trifluoromethanesulfonic acid doping Solution processing

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Large-Area Gravure-Printed AgNWs Electrode on Water/Oxygen Barrier Substrate for Long-Term Stable Large-Area flexible organic solar cells

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Chinese Journal of Chemistry 2024年第5期42卷 478-484页

作者： Hao Wang Yaqin Pan Yunfei Han Zhuo Chen Tianyu Liu Lianping Zhang Qun Luo Chang-Qi Ma Printable Electronics Research Center & i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS)SuzhouJiangsu215123 China Nano Science and Technology Institute University of Science and Technology of China166 Ren Ai RoadSEID SIPSuzhouJiangsu215123 China

Large-area AgNWs electrodes(25 cm×10 cm)were fabricated through roll-to-roll printing on the polyvinyl alcohol(PVA)modified water and oxygen barrier *** modification of the barrier film with PVA improved the wettability of silver nanowires on the barrier films and led to the formation of homogenous large-area AgNWs *** mechanical flexibility,especially the adhesion force between the silver electrode and the barrier film substrate was dramatically improved through PVA *** efficiency of 13.51%for the flexible OSCs with an area of 0.64 cm2 was achieved based on the PET/barrier film/PVA/AgNWs *** long-term stability showed the flexible OSCs based on the PET/barrier film/PVA/AgNWs electrode have a significantly improved stability relative to the device on PET/AgNWs electrode,and comparable air stability as the rigid device with glass/ITO *** unencapsulated devices maintained nearly 50%of the original efficiency after storage for 600 h in *** a simple top encapsulation,the flexible devices remained at 60%of the initial efficiency after 2000 h in the ***,the flexible AgNWs electrode based on the barrier film would have the potential to improve the air storage stability of organic flexible solar cells.

关键词： flexible organic solar cell AgNWs electrode Air storage stability Barrier films substrate Energy conversion flexible electronics Interface

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Highly impermeable and flexible silica encapsulation films synthesized by sol-gel process

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Nano Research 2022年第8期15卷 7476-7483页

作者： Si-Hoon Kim Gyeong-Seok Hwang Donghwan Koo Dong-Hyun Seo Ye-Pil Kwon Hansuek Lee Hyesung Park Eun-chae Jeon Ju-Young Kim School of Materials Science and Engineering University of UlsanTechno saneop-ro 55beon-gil 12Ulsan 44776Republic of Korea Department of Materials Science and Engineering Ulsan National Institute of Science and Technology(UNIST)UNIST-gil 50Ulsan 44919Republic of Korea Department of Physics Korea Advanced Institute of Science and Technology(KAIST)Daehak-ro 291Deajeon 34141Republic of Korea Graduate School of Semiconductor Materials and Devices Ulsan National Institute of Science and Technology(UNIST)UNIST-gil 50Ulsan 44919Republic of Korea

Silica thin films synthesized sol–gel process are proposed as flexible encapsulation materials.A sol–gel process provides a dense and stable amorphous silica structure,yielding an extremely high elastic deformation limit of 4.9%and extremely low water vapor transmission rate(WVTR)of 2.90×10^(−4)g/(m^(2)∙day)at 60℃and relative humidity of 85%.The WVTR is not degraded by cyclic bending deformations for the bending radius corresponding to a tensile strain of 3.3%in the silica encapsulation film,implying that the silica thin film is robust against the formation of pinhole-type defects by cyclic bending *** organic solar cells encapsulated with the silica films operate without degradation in power conversion efficiency for 50,000 bending cycles for a bending radius of 6 mm.

关键词： silica thin film sol-gel flexible encapsulation mechanical reliability flexible organic solar cell

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