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additive engineering for Sb2S3 indoor photovoltaics with efficiency exceeding 17％

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光：科学与应用（英文版） 2024年第12期13卷 3015-3029页

作者： Xiao Chen Xiaoxuan Shu Jiacheng Zhou Lei Wan Peng Xiao Yuchen Fu Junzhi Ye Yi-Teng Huang Bin Yan Dingjiang Xue Tao Chen Jiejie Chen Robert L.Z.Hoye Ru Zhou School of Electrical Engineering and Automation Hefei University of TechnologyHefei 230009PR China Department of Environmental Science and Engineering Key Laboratory of Urban Pollutant ConversionUniversity of Science and Technology of ChinaHefei 230009PR China Hefei National Research Center for Physical Sciences at the Microscale School of Chemistry and Materials ScienceUniversity of Science and Technology of ChinaHefei 230026PR China Department of Chemistry Inorganic Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX1 3QRUK Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190PR China School of Electrical Engineering and Automation Hefei University of TechnologyHefei 230009PR China Department of Chemistry Inorganic Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX1 3QRUK

Indoor photovoltaics(IPVs)have attracted increasing attention for sustainably powering Internet of Things(IoT)***2S3 is a promising IPV candidate material with a bandgap of～1.75 eV,which is near the optimal value for indoor energy ***,the performance of Sb2S3 solar cells is limited by nonradiative recombination,which is dependent on the quality of the absorber *** engineering is an effective strategy to fine tune the properties of solution-processed *** work shows that the addition of monoethanolamine(MEA)into the precursor solution allows the nucleation and growth of Sb2S3 films to be controlled,enabling the deposition of high-quality Sb2S3 absorbers with reduced grain boundary density,optimized band positions,and increased carrier *** with computations,it is revealed that the incorporation of MEA leads to a more efficient and energetically favorable deposition for enhanced heterogeneous nucleation on the substrate,which increases the grain size and accelerates the deposition rate of Sb2S3 *** to suppressed carrier recombination and improved charge-carrier transport in Sb2S3 absorber films,the MEA-modulated Sb2S3 solar cell yields a power conversion efficiency(PCE)of 7.22％under AM1.5 G illumination,and an IPV PCE of 17.55％under 1000 lux white light emitting diode(WLED)illumination,which is the highest yet reported for Sb2S3 ***,we construct high performance large-area Sb2S3 IPV minimodules to power IoT wireless sensors,and realize the long-term continuous recording of environmental parameters under WLED illumination in an *** work highlights the great prospect of Sb2S3 photovoltaics for indoor energy harvesting.

关键词： engineering with additive efficiency exceeding indoor photovoltaics

additive manufacturing of Sm-Fe-N magnets

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Journal of Rare Earths 2019年第10期37卷 1078-1082页

作者： J.A.B.Engerroff A.B.Baldissera M.D.Magalhaes P.H.Lamarao P.A.P.Wendhausen C.H.Ahrens J.M.Mascheroni Department of Mechanical Engineering Federal University of Santa CatarinaFlorianopolisBrazil AlkimatTecnologia Sao JoseBrazil

Isotropic Sm-Fe-N bonded magnets were obtained by additive manufacturing(AM). The technique used was the so-called powder bed fusion(PBF) and the feedstock was composed of a polymeric binder(PA-12) and Sm-Fe-N flake particles(Nitroquench-P). The AM set-up equipment uses a computer-controlled CO2 laser beam to melt the binder and constructs magnets layer-by-layer. In order to develop this study, a cylinder with 10 mm of both height and diameter was selected as the shape of samples. Specimens were analyzed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). Magnetic properties were measured in a hysteresis graph. XRD results indicate that there is no degradation of the main magnetic phase(SmFe7 Nx). In the AM component, porous regions were identified on SEM micrographs, as well as magnetic particles and polymeric binder. Remanence values(Br) as great as 0.3 T are achieved, while intrinsic coercivities remain in the range from 616 up to 642 kA/m. An additional isostatic compression of the parts results in greater remanence, which is directly proportional to the density increase. Coercivity is also sensitive to the porosity decrease, probably due to a better interlocking of particles. Current results indicate AM as a promising route for near net-shape manufacturing of Sm-Fe-N permanent magnets, a market niche yet to be widely explored.

关键词： Sm-Fe-N Permanent magnets additive manufacturing Rare earths

additive Maps Preserving Nilpotent Perturbation of Scalars

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Acta Mathematica Sinica,English Series 2019年第3期35卷 407-426页

作者： Ting ZHANG Jin Chuan HOU School of Mathematics Taiyuan University of Technology Department of Mathematics Shanxi University

Let X be a Banach space over F(= R or C) with dimension greater than 2. Let N(X) be the set of all nilpotent operators and B_0(X) the set spanned by N(X). We give a structure result to the additive maps on FI + B_0(X) that preserve rank-1 perturbation of scalars in both directions. Based on it, a characterization of surjective additive maps on FI + B_0(X) that preserve nilpotent perturbation of scalars in both directions are obtained. Such a map Φ has the form either Φ(T) = cAT A^(-1)+ φ(T)I for all T ∈ FI + B_0(X) or Φ(T) = cAT*A^(-1)+ φ(T)I for all T ∈ FI + B_0(X), where c is a nonzero scalar,A is a τ-linear bijective transformation for some automorphism τ of F and φ is an additive *** addition, if dim X = ∞, then A is in fact a linear or conjugate linear invertible bounded operator.

关键词： Banach spaces nilpotent operators perturbations additive preservers

New Carbon Nitride C_(3)N_(3) additive for Improving Cationic Defects of Perovskite Solar Cells

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Energy & Environmental Materials 2023年第1期6卷 281-288页

作者： Zuhong Li Jiaxin Feng Jinguo Cao Jiaren Jin Yijun Zhou Duoling Cao Zihui Liang Bicheng Zhu Ming Li Li Zhao Shimin Wang Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional MoleculesHubei Key Laboratory of Polymer MaterialsSchool of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China

Due to the loss of organic amine cations and lead ions in the structure of the iodine-lead methylamine perovskite solar cell,there are a large number of defects within the film and the recombination loss caused by grain boundaries,which seriously hinder the further improvement of power conversion efficiency and ***,a novel carbon nitride C_(3)N_(3) incorporated into the perovskite precursor solution is a multifunctional strategy,which not only increases the light absorption strength,grain size,and hydrophobicity of the perovskite film,but also effectively passivates the bulk and interfacial defects of perovskite and verified by the first-principles density functional theory *** a result,the efficiency and stability of perovskite solar cells are *** device with 0.075 mg mL^(-1) C_(3)N_(3) additive delivers a champion power conversion efficiency of 19.91%with suppressed hysteresis,which is significantly higher than the 18.16% of the control *** addition,the open-circuit voltage of the modified device with the maximum addition as high as 1.137 V is 90.96% of the Shockley–Queisser limit(1.25 V).Moreover,the power conversion efficiency of the modified device without encapsulation can maintain nearly 90% of its initial value after being stored at 25℃ and 60% relative humidity for 500 *** work provides a new idea for developing additives to improve the power conversion efficiency and stability of perovskite solar cells.

关键词： additive C_(3)N_(3) humidity stability passivate defect perovskite solar cells

Physics-embedded graph network for accelerating phase-field simulation of microstructure evolution in additive manufacturing

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npj Computational Materials 2022年第1期8卷 1930-1942页

作者： Tianju Xue Zhengtao Gan Shuheng Liao Jian Cao Department of Mechanical Engineering Northwestern UniversityEvanston60208ILUSA

The phase-field(PF)method is a physics-based computational approach for simulating interfacial *** has been used to model powder melting,rapid solidification,and grain structure evolution in metal additive manufacturing(AM).However,traditional direct numerical simulation(DNS)of the PF method is computationally expensive due to sufficiently small mesh ***,a physics-embedded graph network(PEGN)is proposed to leverage an elegant graph representation of the grain structure and embed the classic PF theory into the graph *** reformulating the classic PF problem as an unsupervised machine learning task on a graph network,PEGN efficiently solves temperature field,liquid/solid phase fraction,and grain orientation variables to minimize a physics-based loss/energy *** approach is at least 50 times faster than DNS in both CPU and GPU implementation while still capturing key physical ***,PEGN allows to simulate large-scale multi-layer and multi-track AM build effectively.

关键词： network additive phase

Side-chains Engineering of Conjugated Polymers toward additive-free Non-fullerene Organic Solar Cells

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Chinese Journal of Polymer Science 2021年第1期39卷 43-50,I0005页

作者： Feng Liu Dan Wang Jun-Yu Li Cheng-Yi Xiao Yong-Gang Wu Wei-Wei Li Guang-Sheng Fu College of Physics Science&Technology Hebei UniversityBaoding 071002China Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

Side-chain engineering plays a significant role in the design of conjugated materials. In this work, a series of conjugated polymers PBDB-T-R with functionalized groups at the end of side units were developed as electron donor for organic solar cells(OSCs). The donor polymers PBDB-T-I and PBDB-T-OAc with iodine and acetate end groups exhibited similar absorption and energy levels, but showed much improved PCEs in OSCs compared to the polymer PBDB-T-H without substitutions at the end groups. Additionally, we found that PBDB-T-I and PBDB-T-OAc based cells exhibited optimized performance when using chloroform as solution-processed solvent without any additives. These results indicate that these conjugated polymers can act as self-additive to fabricate photoactive layers via solution process in OSCs.

关键词： Organic solar cells Non-fullerene End group additive Crystallinity

Green antisolvent additive engineering to improve the performance of perovskite solar cells

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Journal of Energy Chemistry 2022年第3期31卷 1-8,I0001页

作者： Jiahui Li Xiaodong Hua Fei Gao Xiaodong Ren Chaoqun Zhang Yu Han Yuanrui Li Bonan Shi Shengzhong(Frank)Liu Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of EducationShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

High-quality perovskite films with larger grain size and fewer defects is a prerequisite for highperformance perovskite solar cells(PSCs).Antisolvent-assisted crystallization is an effective approach to obtain compact and uniform perovskite films;however,the majority of antisolvents currently applied have strong toxicity,and the control of perovskite crystallization is not easy through single *** this work,a green antisolvent of ethyl acetate(EA)with acetylacetone(AA)additive is used to fine-tune perovskite crystallization and passivate defect,which produces uniform and compact CH;NH;PbI;perovskite films having larger grain and fewer grain boundaries and reduced defect ***,the interfacial hydrophobic characteristic of the perovskite films is *** the optimized concentration of AA in EA,the power conversion efficiency(PCE)of the CH;NH;PbI;PSCs was improved from 19.2%to 21.1%and their stability in air was also *** results present a green antisolvent additive engineering strategy to enhance the crystallinity,passivate defects,and fabricate efficient and stable PSCs.

关键词： CH3NH3PbI3 films Antisolvent additive Defect passivation Perovskite solar cells

Modification of POSS and their tribological properties and resistant to space atomic oxygen irradiation as lubricant additive of multialkylated cyclopentanes

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Friction 2024年第5期12卷 884-896页

作者： Xingwei WANG Chaoyang ZHANG Chen ZHAO Yijing LIANG Ming ZHANG Wufang YANG Bo YU Qiangliang YU Meirong CAI Feng ZHOU Weimin LIU State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai264000China

Developing functional additive resistant to space atomic oxygen(AO)irradiation through simple molecular design and chemical synthesis to enhance the lubricating performance of multialkylated cyclopentanes(MACs)oil is a significant ***,sulfur-containing polyhedral oligomere silsesquioxane(POSS)were synthesize via a click-chemistry reaction of octavinyl polyhedral oligomeric with alkyl *** reduce-friction(RF),anti-wear(AW)properties and anti-AO irradiation of POSS-S-R as MACs base oil additives in atmospheric and simulated space environments were systematically investigated for the first *** demonstrate that POSS-S-R not only possesses outstanding anti-AO irradiation capacity but also effectively improves the RF and AW of MACs in atmospheric or simulated space *** improvement is due to the excellent anti-AO irradiation properties of the POSS structure itself and the high load-carrying ability of silicon-containing and sulfur-containing compounds generated by tribo-chemical reactions,which effectively separates the direct contact of the friction *** believe that this synthesized POSS-S-R is a promising additive for space lubricants.

关键词： POSS additive reduce-friction anti-wear multialkylated cyclopentanes(MACs) resistant atomic irradiation

Tribological performance of organic cadmium compound as lubricant additive

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中国有色金属学会会刊：英文版 2004年第z1期14卷 374-378页

作者： HU Jian-qiang XIE Feng ZHU Huan-qin ZHEN Fa-zheng YAO Jun-bing Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China First Department Aviation Oil Research Institute Beijing 100000 China

The oil-soluble cadmium dipropyldithiophosphate additive was synthesized. A four-ball tester was used to evaluate the tribological performance of the additive in a mineral oil under different loads and lubricant grease synthesized compared with some commercial additives. The results show that it exhibits excellent antiwear and load-carrying capacities and is better than other additives. The surface analytical tools such as scanning electron microscope (SEM) with energy dispersive X-ray (EDX), X-ray photoelectron spectrometer (XPS) were used to investigate the topography, the compositions, and chemical states of some typical elements on the rubbing surface of worn *** and light topography of worn scar further confirms that the additive shows good antiwear capacities. The results of EDX and XPS analyses indicate that tribochemical mixed protective films consisting of atomic cadmium, sulphides, sulphates and phosphates are formed on the rubbing surface, which contribute to improving the tribological properties of lubricant and grease. Particularly, the soft cadmium film formed plays an important role in improving antiwear properties of oils. Finally, antiwear mechanism of the additive and formation scheme of atomic cadmium was proposed.

关键词： cadmium dipropyldithiophosphate additive extreme pressure antiwear mechanism