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Green‑Solvent Processed blade‑coating Organic Solar Cells with an Efficiency Approaching 19%Enabled by Alkyl‑Tailored Acceptors

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Nano-Micro Letters 2023年第12期15卷 449-462页

作者： Hairui Bai Ruijie Ma Wenyan Su Top Archie Dela Pea Tengfei Li Lingxiao Tang Jie Yang Bin Hu Yilin Wang Zhaozhao Bi Yueling Su Qi Wei Qiang Wu Yuwei Duan Yuxiang Li Jiaying Wu Zicheng Ding Xunfan Liao Yinjuan Huang Chao Gao Guanghao Lu Mingjie Li Weiguo Zhu Gang Li Qunping Fan Wei Ma State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China Jiangsu Engineering Research Center of Light‑Electricity‑Heat Energy‑Converting Materials and Applications School of Materials Science and EngineeringChangzhou UniversityChangzhou 213164People’s Republic of China Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education/National Engineering Research Center for Carbohydrate Synthesis Jiangxi Normal University99 Ziyang AvenueNanchang 330022People’s Republic of China Department of Electronic and Information Engineering Research Institute for Smart Energy(RISE)The Hong Kong Polytechnic UniversityKowloon 999077Hong KongPeople’s Republic of China School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an 710054People’s Republic of China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloon 999077Hong KongPeople’s Republic of China Advanced Materials Thrust Function HubThe Hong Kong University of Science and TechnologyNanshaGuangzhouPeople’s Republic of China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’an 710054People’s Republic of China Xi’an Key Laboratory of Liquid Crystal and Organic Photovoltaic Materials State Key Laboratory of Fluorine&Nitrogen ChemicalsXi’an Modern Chemistry Research InstituteXi’an 710065People’s Republic of China

Power-conversion-efficiencies(PCEs)of organic solar cells(OSCs)in laboratory,normally processed by spin-coating technology with toxic halogenated solvents,have reached over 19%.However,there is usually a marked PCE drop when the bladecoating and/or green-solvents toward large-scale printing are used instead,which hampers the practical development of ***,a new series of N-alkyl-tailored small molecule acceptors named YR-SeNF with a same molecular main backbone are developed by combining selenium-fused central-core and naphthalene-fused *** to the N-alkyl engineering,NIR-absorbing YR-SeNF series show different crystallinity,packing patterns,and miscibility with polymeric *** studies exhibit that the molecular packing,crystallinity,and vertical distribution of active layer morphologies are well optimized by introducing newly designed guest acceptor associated with tailored N-alkyl chains,providing the improved charge transfer dynamics and stability for the PM6:L8-BO:YRSeNF-based *** a result,a record-high PCE approaching 19%is achieved in the blade-coating OSCs fabricated from a greensolvent o-xylene with high-boiling ***,ternary OSCs offer robust operating stability under maximum-power-point tracking and well-keep>80%of the initial PCEs for even over 400 *** alkyl-tailored guest acceptor strategy provides a unique approach to develop green-solvent and blade-coating processed high-efficiency and operating stable OSCs,which paves a way for industrial development.

关键词： Alkyl-tailored guest acceptors blade-coating Green solvent processing Stability Organic solar cells

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Development and application of blade-coating technique in organic solar cells

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Nano Research 2023年第9期16卷 11571-11588页

作者： Xin Zhang Hong Zhang Shilin Li Linge Xiao Siwen Zhang Bing Han Jiajie Kang Huiqiong Zhou China School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China School of Chemistry Beihang UniversityBeijing 100191China The Department of Thoraciccardio Surgery PLA Rocket Force Characteristic Medical CenterBeijing 100088China

Due to the characteristics of lower material waste,higher crystallinity,roll-to-roll compatibility,and high-throughput continuous processing,blade-coating has been widely applied in the preparation of large-area organic solar *** this paper,the technique of blade-coating is introduced,including the effects of blading speed,substrate temperature,and other technological innovations during the process of ***,the recent progress of blade-coating in organic solar cells is summarized and the active layer prepared by a blade-coating method is introduced in detail,including materials,processing methods,solvents,and *** interface layer and electrodes prepared by the blade-coating method are also ***,some perspectives on the blade-coating method are *** the foreseeable future,blade-coating will become the core of batch production of large-area organic solar cells,so as to make organic solar cells more competitive.

关键词： blade-coating printable organic solar cells large-area

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blade-coating Perovskite Films with Diverse Compositions for Efficient Photovoltaics

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Energy & Environmental Materials 2021年第3期4卷 277-283页

作者： Jun-Xing Zhong Wu-Qiang Wu Liming Ding Dai-Bin Kuang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

In this research highlight,recent significant advances with hot-assisted blade-coating or air knife-assisted blade-coating of different perovskite compositions with bandgaps ranging from 1.3 eV to 1.9 eV(*** or small-bandgap perovskites with mixed cations and anions,2D/3D perovskites,Pb/Sn binary perovskites,and all-inorganic perovskites)for single-junction or tandem PSCs are discussed,with an emphasis on elucidating the distinct ink formulation engineering strategies,crystal growth mechanisms,crystallization kinetics,and optoelectronic properties of the different perovskite compositions.

关键词： perovskite solar cells blade-coating composition engineering bandgaps power conversion efficiencies

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Stabilization of formamidinium lead iodide perovskite precursor solution for blade-coating efficient carbon electrode perovskite solar cells

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Chinese Physics B 2021年第8期30卷 176-181页

作者：占宇陈炜杰杨甫李耀文 Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

Formamidinium lead triiodide(FAPbI_(3))is a research hotspot in perovskite photovoltaics due to its broad light absorption and proper thermal ***,quite a few researches focused on the stability of the FAPbI_(3) perovskite precursor ***,the most efficient FAPbI_(3) layers are prepared by the spin-coating method,which is limited to the size of the ***,the stability of FAPbI_(3) perovskite solution with methylammonium chloride(MACl)or cesium chloride(CsCl)additive is studied for preparing perovskite film through an upscalable blade-coating *** additive works well for achieving a high-quality FAPbI_(3) film,resulting in efficient carbon electrode perovskite solar cells(pero-SCs)in the ambient ***,the perovskite solution with MACl additive shows poor aging stability that noα-FAPbI_(3) phase is observed when the solution is aged over one *** the perovskite solution with CsCl additive shows promising aging stability that it still forms high-quality pureα-FAPbI_(3) perovskite film even the solution is aged over one *** the solution aging process,the MACl could be decomposed into methylamine which will form some unfavored intermediated phase inducingδ-phase FAPbI_(3).Whereas,replacing MACl with CsCl could effectively solve this *** founding shows that there is a great need to develop a non-MACl FAPbI_(3) perovskite precursor solution for cost-effective preparation of pero-SCs.

关键词： perovskite precursor solution formamidinium lead iodide blade-coating carbon electrode

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Long-Chain Gemini Surfactant-Assisted blade coating Enables Large-Area Carbon-Based Perovskite Solar Modules with Record Performance

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Nano-Micro Letters 2023年第10期15卷 463-477页

作者： Yumin Ren Kai Zhang Zedong Lin Xiaozhen Wei Man Xu Xianzhen Huang Haining Chen Shihe Yang Guangdong Provincial Key Lab of Nano‑Micro Material Research School of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen 518055People’s Republic of China Shenzhen Bay Laboratory Institute of Biomedical EngineeringShenzhen 518107GuangdongPeople’s Republic of China School of Materials Science and Engineering Beihang UniversityBeijing 100191People’s Republic of China

Carbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in ambient ***,scaling up to high-efficiency carbon-based solar modules hinges on reliable deposition of uniform defect-free perovskite films over large areas,which is an unsettled but urgent *** this work,a long-chain gemini surfactant is introduced into perovskite precursor ink to enforce self-assembly into a network structure,considerably enhancing the coverage and smoothness of the perovskite *** long gemini surfactant plays a distinctively synergistic role in perovskite film construction,crystallization kinetics modulation and defect passivation,leading to a certified record power conversion efficiency of 15.46%with Voc of 1.13 V and Jsc of 22.92 mA cm^(-2)for this type of ***,all of the functional layers of the module are printed through a simple and high-speed(300 cm min^(-1))blade coating strategy in ambient *** results mark a significant step toward the commercialization of all-printable carbon-based perovskite solar modules.

关键词： Long-chain gemini surfactant blade-coating Capillary number Carbon-based perovskite photovoltaics All-printable module

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Improvement on the performance of perovskite solar cells by doctor-blade coating under ambient condition with hole-transporting material optimization

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Journal of Energy Chemistry 2019年第11期28卷 207-213页

作者： Deng Wang Jiming Zheng Xingzhu Wang Jishu Gao Weiguang Kong Chun Cheng Baomin Xu Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina Academy for Advanced Interdisciplinary Research Southern University of Science and TechnologyShenzhen 518055GuangdongChina School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Numerous fabrication methods have been developed for high-efficiency perovskite solar cells(PSCs). However, these are limited to spin-coating processes in a glove box and are yet to be commercialized. Therefore, there is a need to develop a controllable and scalable deposition technique that can be carried out under ambient conditions. Even though the doctor-blade coating technique has been widely used to prepare PSCs, it is yet to be applied to high-efficiency PSCs under ambient conditions(RH ~45%, RT ~25 °C). In this study, we conducted blade-coating fabrication of modified high-efficiency PSCs under such conditions. We controlled the substrate temperature to ensure phase transition of perovskite and added dimethyl sulfoxide(DMSO) to the perovskite precursor solution to delay crystallization, which can facilitate the formation of uniform perovskite films by doctor-blade coating. The as-prepared perovskite films had large crystal domains measuring up to 100 μm. Solar cells prepared from these films exhibited a current density that was enhanced from 17.22 to 19.98 m A/cm^2 and an efficiency that was increased from 10.98% to 13.83%. However, the open-circuit voltage was only 0.908 V, probably due to issues with the hole-transporting layer. Subsequently, we replaced poly(3,4-ethylenedioxythiophene) polystyrene sulfonate(PEDOT:PSS) with Ni O x as the hole-transporting material and then prepared higher-quality perovskite films by blade-coating under ambient conditions. The as-prepared perovskite films were preferably orientated and had large crystal domains measuring up to 200 μm;The open-circuit voltage of the resulting PSCs was enhanced from 0.908 to 1.123 V, while the efficiency increased from 13.83% to 15.34%.

关键词： Hole-transporting material NiOx Perovskite solar cells Thermally assisted blade-coating Ambient condition Fabrication

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Non-conjugated terpolymer acceptors for highly efficient and stable lager-area all-polymer solar cells

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Journal of Energy Chemistry 2022年第8期31卷 631-638,I0017页

作者： Jiabin Liu Jinliang Liu Jiawei Deng Bin Huang Jiyeon Oh Lin Zhao Liang Liu Changduk Yang Dong Chen Feiyan Wu Lie Chen College of Chemistry and Chemical Engineering/Institute of Polymers and Energy Chemistry(IPEC) Nanchang UniversityNanchang 330031JiangxiChina Institute of Advanced Scientific Research(iASR)/Key Laboratory of Functional Organic Small Molecules for Ministry of Education Jiangxi Normal UniversityNanchang 330022JiangxiChina Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology 156 Ke Jia AvenueGanzhou 341000JiangxiChina Department of Energy Engineering School of Energy and Chemical EngineeringPerovtronics Research CenterLow Dimensional Carbon Materials CenterUlsan National Institute of Science and Technology(UNIST)50 UNIST-gilUlju-gunUlsan 44919South Korea

All-polymer solar cells(all-PSCs)have made significant progress recently,but few studies have been conducted to investigate the lab-to-manufacturing translation from the spin-coating method to the printing ***,the random copolymerization method and non-conjugated backbone approach are integrated to manipulate the morphology and photoelectric properties of the active layer for large-area printed all-PSCs.A series of non-conjugated terpolymer acceptors PYSe-TC_(6)T(x)(x=5,10,and 20,refers to the molar ratio of TC_(6)T unit)are developed by covalently introducing non-conjugated unit TC_(6)T into the PYSe host bipolymer by random *** spin-coated PYSe-TC_(6)T(10)-based all-PSC demonstrates the best power conversion efficiency(PCE)of 13.54%,superior to the PYSe-based one(12.45%).More intriguingly,morphological studies reveal that a combination of the random polymerization and non-conjugated backbone strategy can effectively prevent the active layer from overaggregation and improve the film quality during the printing process,thereby minimizing the efficiency and technology gap between spin-coated small-area devices and blade-coated large-area *** directly using the same preparation condition of spin-coating,the blade-coated small-area(0.04 cm^(2))delivers a PCE of 12.83%and the large-area(1.21 cm^(2))device achieves a PCE of 11.96%with a small PCE *** PCE value and PCE loss are one of the most outstanding performances of the bladecoated *** findings reveal that a combination of the non-conjugated flexible backbone with random copolymerization to develop non-conjugated terpolymers is an attractive design concept to smoothly realize the lab-to-manufacturing translation.

关键词： All-polymer Non-conjugated Large area blade-coating Lab-to-manufacturing translation

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Self-assembled monolayer enabling improved buried interfaces in blade-coated perovskite solar cells for high efficiency and stability

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Nano Research Energy 2022年第1期1卷 14-21页

作者： Jie Zeng Leyu Bi Yuanhang Cheng Baomin Xu Alex K.-Y.Jen Department of Materials Science and Engineering City University of Hong KongKowloon 999077Hong KongChina Department of Chemistry City University of Hong KongKowloon 999077Hong KongChina Hong Kong Institute for Clean Energy City University of Hong KongKowloon 999077Hong KongChina Department of Materials Science and Engineering Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055China

Despite the rapidly increased power conversion efficiency(PCE)of perovskite solar cells(PVSCs),it is still quite challenging to bring such promising photovoltaic technology to *** of the challenges is the upscaling from small-sized lab devices to large-scale modules or panels for ***,most of the efficient inverted PVSCs are fabricated on top of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA),which is a commonly used hole-transporting material,using spin-coating method to be incompatible with large-scale film ***,it is important to develop proper coating methods such as blade-coating or slot-die coating that can be compatible for producing large-area,high-quality perovskite thin *** is found that due to the poor wettability of PTAA,the blade-coated perovskite films on PTAA surface are often inhomogeneous with large number of voids at the buried interface of the perovskite *** solve this problem,self-assembled monolayer(SAM)-based hole-extraction layer(HEL)with tunable headgroups on top of the SAM can be modified to provide better wettability and facilitate better interactions with the perovskite coated on top to passivate the interfacial *** more hydrophilic SAM surface can also facilitate the nucleation and growth of perovskite films fabricated by blade-coating methods,forming a compact and uniform buried *** addition,the SAM molecules can also be modified so their highest occupied molecular orbital(HOMO)levels can have a better energy alignment with the valence band maxima(VBM)of *** by the high-quality buried interface of perovskite on SAM-based substrate,the champion device shows a PCE of 18.47%and 14.64%for the devices with active areas of 0.105 cm^(2) and 1.008 cm^(2),*** addition,the SAM-based device exhibits decent stability,which can maintain 90%of its initial efficiency after continuous operation for over 500 h at 40℃ in inert ***

关键词： self-assembled monolayer buried interface perovskite solar cells upscaling blade-coating

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