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Bifunctional bridging capping layer enables 24.5% efficiency of perovskite solar cells with polymer-based hole transport materials

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Science China Chemistry 2025年第1期68卷 350-359页

作者： Can Zhu Yiyang Wang Lei Meng Beibei Qiu Jing Li Shucheng Qin ke hu Xin Jiang Wenbin Lai Minchao Liu Zhe Liu Chenxing Lu Jinyuan Zhang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences School of Chemical Science University of Chinese Academy of Sciences key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province College of Physics and Electronic Information Engineering Zhejiang Normal University key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials ScienceSoochow University

Developing a bridge capping layer between perovskite and hole transport layer materials（HTMs） in the n-i-p perovskite solar cells（pero-SCs） is an effective approach to modify the morphology of HTMs and passivate the perovskite ***, we select the quinoxaline-based bifunctional passivation agent, quinoxalin-6-yl-methylamine hydrochloride（Qx MACl）,as the bridging layer, and a D-A copolymer PBQ12 containing the same quinoxaline unit as an HTM for the n-i-p pero-SCs. Due to the π-π stacking among the common quinoxaline units in the bridge layer and HTM, Qx MACl induces the π-π stacking of the PBQ12 film and improves the film morphology of HTMs with better conductivity. Additionally, Qx MACl can effectively passivate the perovskite surface, and PBQ12 possesses appropriate energy levels and high hole mobility. The pero-SCs based on FAPbI3with PBQ12/Qx MACl treatment showed a higher power conversion efficiency（PCE） of 24.05% and outstanding stability, maintaining 95.4% and 92.1% of its initial PCE after 750 h of storage and after over 800 h of thermal annealing at 85 °C, respectively. To further enhance the PCE of the PBQ12/Qx MACl-based devices, we developed a non-metal ion dopant for the PBQ12 HTM. Through trace doping of PBQ12 HTM by the non-metal ion dopant, the PCE of the PBQ12/Qx MACl-based devices reached 25.24%（the calibrated PCE of 24.55% by the National Institute of Metrology, China）.

关键词： D-A copolymer, hole transport materials, bifunctional bridge capping layer, passivation perovskite solar cells

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Blow-up of Classical Solutions to the Isentropic Compressible BarotropicNavier-Stokes-Langevin-Korteweg Equations

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Journal of Partial Differential Equations 2022年第1期35卷 78-86页

作者： hu ke School of Mathematical Sciences Fudan UniversityShanghai 200433China

In this paper,we study the barotropic Navier-Stokes-Langevin-Korteweg system in *** the derivatives of the square root of the density and the velocity field decay to zero at infinity,we can prove the classical solutions blow up in finite time when the initial energy has a certain upper *** obtain this blow up result by a contradiction argument based on the conservation of the total mass and the total quasi momentum.

关键词： Navier-Stokes-Langevin-Korteweg system classical solutions blow up

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Study on interface failure of shape memory alloy(SMA)reinforced smart structure with damages

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Acta Mechanica Sinica 2005年第3期21卷 286-293页

作者： Zili hu ke Xiong Xinwei Wang The Aeronautical Science key Laboratory for Smart Materials and Structures Nanjing University of Aeronautics and Astronautics. Nanjing 210016 China

Shape memory alloy （SMA） reinforced smart structure can be used to make structural shape and strength selfadapted and structural damage self-restrained. Although SMA smart structures without damages were extensively studied, researches on SMA smart structures with damages have rarely been reported thus far. In this paper, thermo-mechanical behaviors of SMA fiber reinforced smart structures with damages are analyzed through a shear lag model and the variational principle, Mathematical expressions of the meso-displacement field and the stress-strain field of a typical element with damages are obtained, and a failure criterion for interface failure between SMA fibers and matrix is established, which is applied to an example. Results presented herein may provide a theoretical foundation for further studies on integrity of SMA smart structures.

关键词： Smart structures Damages SMA Failure Meso-mechanics analysis Variational principle

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Bioinspired Polarized Skylight Orientation Determination Artificial Neural Network

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Journal of Bionic Engineering 2023年第3期20卷 1141-1152页

作者： huaju Liang Hongyang Bai ke hu Xinbo Lv School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjing210094China Neuromorphic Computing Laboratory China Nanhu Academy of Electronics and Information TechnologyJiaxing314001China Guidance Radar General Department Xi’an Electronic Engineering Research InstituteXi’an710100China School of Automation Nanjing University of Science and TechnologyNanjing210094China

This paper proposes an artificial neural network to determine orientation using polarized skylight. This neural network has specific dilated convolution, which can extract light intensity information of different polarization directions. Then, the degree of polarization (DOP) and angle of polarization (AOP) are directly extracted in the network. In addition, the exponential function encoding of orientation is designed as the network output, which can better reflect the insect’s encoding of polarization information and improve the accuracy of orientation determination. Finally, training and testing were conducted on a public polarized skylight navigation dataset, and the experimental results proved the stability and effectiveness of the network.

关键词： Polarized light navigation Orientation determination Artificial neural network

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Microstructure,Mechanical Properties and Texture Evolution of Mg-Al-Zn-La-Gd-Y Magnesium Alloy by Hot Extrusion and Multi-Pass Rolling

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Acta Metallurgica Sinica(English Letters) 2020年第10期33卷 1359-1368页

作者： Qiyu Liao Wenxin hu Qichi Le Xingrui Chen ke hu Chunlong Cheng Chenglu hu key Lab of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China Baotou Research Institute of Rare Earths Baotou 014000China

A high-ductility Mg-8.10Al-0.42Zn-0.51Mn-1.52La-1.10Gd-0.86 Y(wt%)alloy was developed by hot extrusion and multi-rolling *** between microstructure,mechanical properties and texture evolution of the extruded and rolled alloy were *** rolling process had significant effect on grain refinement of the extruded *** grain size reduced from 12.3 to 4.9μm with the increasing rolling *** the increase in rolling pass,the proportion of dynamic recrystallized(DRXed)grains increases due to particle-stimulated nucleation,grain boundary nucleation and twin induced *** the process of multiple rolling,the basal pole gradually tilted from normal direction to transverse direction due to the asymmetric deformation and irregular grain deformation,resulting in the weakening of the base *** results showed that grain refinement and texture weakening were the main reasons for the good ductility of the alloy.

关键词： Extrusion Multi-rolling Grain refinement Texture evolution Mechanical properties

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Ecological Network Analysis Quantifying the Sustainability of Regional Economies: A Case Study of Guangdong Province in China

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Chinese Geographical Science 2018年第1期28卷 127-136页

作者： LIANG Jinshe hu ke DAI Teqi Faculty of Geographical Science Beijing Normal University

To meet the challenge of sustainable development, sustainability must be made. Ecological network analysis(ENA) was introduced in this paper as an approach to quantitatively measure the growth, development, and sustainability of an economic system. The Guangdong economic networks from 1987 to 2010 were analyzed by applying the ENA approach. Firstly, a currency flow network among economic sectors was constructed to represent the Guangdong economic system by adapting the input-output(I-O) table data. Then, the network indicators from the ENA framework involving the total system throughput(TST), average mutual information(AMI), ascendency(A), redundancy(R) and development capacity(C) were calculated. Lastly, the network indicators were analyzed to acquire the overall features of Guangdong's economic operations during 1987–2010. The results are as follows: the trends of the network indicators show that the size of the Guangdong economic network grows exponentially at a high rate during 1987–2010, whereas its efficiency does not present a clear trend over its whole period. The growth is the main characteristic of the Guangdong economy during 1987–2010, with no clear evidence regarding its development. The quantitative results of the network also confirmed that the growth contributed to a great majority of the Guangdong economy during 1987–2010, whereas the development's contribution was tiny during the same period. The average value of the sustainability indicator(α) of the Guangdong economic network was 0.222 during 1987–2010, which is less than the theoretically optimal value of 0.37 for a sustainable human-influenced system. The results suggest that the Guangdong economic system needs a further autocatalysis to improve its efficiency to support the system maintaining a sustainable evolvement.

关键词： network analysis regional economy sustainability evaluation ascendency Guangdong Province of China

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Phylogenetic analysis of Pectinidae (Bivalvia) based on the ribosomal DNA internal transcribed spacer region

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Acta Oceanologica Sinica 2007年第6期26卷 83-90页

作者： huANG Xiaoting BI ke hu Jingjie hu Xiaoli BAO Zhenmin Laboratory of Molecular Genetics and Breeding of Mollusk College of Marine Life Science Ocean University of China Qingdao 266003 China

The ribosomal DNA internal transcribed spacer （ITS） region is a useful genomic region for understanding evolutionary and genetic relationships. In the current study, the molecular phylogenetic analysis of Pectinidae （ Mollusca： Bivalvia） was performed using the nucleotide sequences of the nuclear ITS region in nine species of this family. The sequences were obtained from the scallop species Argopecten irradians, Mizuhopecten yessoensis, Amusium pleuronectes and Mimachlamys nobilis, and compared with the published sequences of Aequipecten opercularis, Chlamys farreri, C. distorta, M. varia, Pecten maximus, and an outgroup species Perna viridis. The molecular phylogenetic tree was constructed by the neighbor-joining and maximum parsimony methods. Phylogenetic analysis based on ITS1, ITS2, or their combination always yielded trees of similar topology. The results support the morphological classifications of bivalve and are nearly consistent with classification of two subfamilies （Chlamydinae and Pectininae） formulated by Waller. However, A. irradians, together with A. opercularis made up of genera Amusium, evidences that they may belong to the subfamily Pectinidae. The data are incompatible with the conclusion of Waller who placed them in Chlamydinae by morphological characteristics. These results provide new insights into the evolutionary relationships among scallop species and contribute to the improvement of existing classification systems.

关键词： bivalve Pectinidae ribosomal DNA ITS phylogeny

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ON POLYA-SZEG INEQUALITIES

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Analysis in Theory and Applications 2005年第4期21卷 395-398页

作者： ke hu Jiangxi Normal University China

This paper gives two new inequalities, which improve two Polya-Szego ＇s inequlities.

关键词： Gram inequality Polya-Szego inequality ,

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A developed dual-site Langmuir model to represent the high-pressure methane adsorption and thermodynamic parameters in shale

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International Journal of Coal Science & Technology 2023年第5期10卷 21-37页

作者： ke hu Qian Zhang Yufei Liu Muhammad Abdurrahman Thaika School of Mining and Petroleum Engineering University of AlbertaEdmontonT6G1H9Canada Institute of Energy School of Earth and Space SciencePeking UniversityBeijing100871China

Comprehending the mechanism of methane adsorption in shales is a crucial step towards optimizing the development of deep-buried shale gas. This is because the methane adsorbed in shale represents a significant proportion of the subsurface shale gas resource. To properly characterize the methane adsorption on shale, which exhibits diverse mineral compositions and multi-scale pore sizes, it is crucial to capture the energy heterogeneity of the adsorption sites. In this paper, a dual-site Langmuir model is proposed, which accounts for the temperature and pressure dependence of the density of the adsorbed phase. The model is applied to the isothermals of methane adsorption on shale, at pressures of up to 30 MPa and temperatures ranging from 40 to 100 ℃. The results show that the proposed model can describe the adsorption behavior of methane on shale more accurately than conventional models, which assume a constant value for the density of adsorbed phase. Furthermore, the proposed model can be extrapolated to higher temperatures and pressures. Thermodynamic parameters were analyzed using correctly derived equations. The results indicate that the widely used, but incorrect, equation would underestimate the isosteric heat of adsorption. Neglecting the real gas behavior, volume of the adsorbed phase, and energy heterogeneity of the adsorption sites can lead to overestimation of the isosteric heat of adsorption. Furthermore, the isosteric heat evaluated from excess adsorption data can only be used to make a rough estimate of the real isosteric heat at very low pressure.

关键词： Shale gas Adsorption-Dual-site Langmuir model Energy heterogeneity Isosteric heat

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Surveying the electrocatalytic CO_(2)-to-CO activity of heterogenized metallomacrocycles via accurate clipping at the molecular level

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Nano Research 2022年第12期15卷 10070-10077页

作者： Meng-ke hu Ning Wang Dong-Dong Ma Qi-Long Zhu State key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences(CAS)Fuzhou350002China College of Chemistry Fuzhou UniversityFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China

Heterogenized phthalocyanine-based molecular catalysts are the ideal electrocatalytic platforms for CO_(2)reduction reaction(CO_(2)RR)because of their well-defined structures and potential *** addition to the pursuit of catalytic performances at industrial potentials,it is equally important to explore experimental rules and design considerations behind activity and ***,we successfully developed a series of nickel phthalocyanines(NiPcs)with different alkyl chains immobilized on multi-walled carbon nanotubes(CNT)to unveil the structure-performance relationship for electrocatalytic CO_(2)RR in neutral ***,a volcano-type trend was found between the activity for CO_(2)-to-CO conversion and alkyl chain lengths of NiPcs on *** results further indicate that their electrocatalytic CO_(2)RR activities are highly related to the molecular dispersion and the heterointerfacial charge transfer capability adjusted by the alkyl ***,the optimized electrocatalyst via accurate clipping at the molecular level exhibits an ultrahigh activity with Faradaic efficiency of CO up to 99.52%.

关键词： nickel phthalocyanines carbon nanotubes CO_(2)reduction reaction alkyl chains structure-performance relationship

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