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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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Fabrication and Characterization of Tailored TiO_2 and WO_3/MWCNT Composites for Methylene Blue Decomposition

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催化学报 2011年第6期32卷 926-932页

作者： ZHU lei meng Zeda OH Won-Chun Department of A dvanced Materials Science ＆ Engineering Hanseo University Chungnam 356-706 Korea

A sol-gel method was used to prepare WO3/MWCNT-TiO2 *** photocatalytic activities were evaluated by the degradation of methylene blue (MB) solution under UV *** catalysts were characterized by X-ray diffraction,specific surface area measurement,energy-dispersive X-ray analysis,transmission and scanning electron *** MB solutions of 100 ml were photodegraded by a small amount of the WO3/MWCNT-TiO2 composite under UV light *** photocatalytic data showed that the WO3/MWCNT-TiO2 composite achieved a high rate of MB *** was attributed to the use of MWCNT which can absorb UV light to create photo-induced electrons,strong adsorption of dye molecules on the photocatalyst,and reduced recombination rate of electron-holes in the WO3/MWCNT-TiO2 composite due to the introduction of the WO3 semiconductor.

关键词：固体超强碱氧化钙硝酸钾氧化铝氧化锆氢氧化钾硝酸钙

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All-in-one strategy: overcome the challenges in the device enlargement of perovskite solar cells

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Science China Chemistry 2022年第7期65卷 1223-1224页

作者： lei meng Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

In recent years, perovskite solar cells(pero-SCs) have gained tremendous development with power conversion efficiency(PCE) reaching 25.7% [1]. Based on its low process cost and high efficiency, pero-SC is now consider... 详细信息

关键词： perovskite overcome gained

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Suppression of the Resonant Scattering in Imperfect Acoustic Cloaking with a Lossy Medium in R^3

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Chinese Physics Letters 2014年第5期31卷 80-83页

作者： LI meng-lei KIM Seungil Department of Mathematics and Research Institute for Basic Sciences Kyung Hee University Seoul 130-701 Korea

It has been realized that resonance frequencies of imperfect the transformation acoustics in R^2 are located near Dirichlet acoustic cloaking based on a small perturbation of eigenvalues of the cloaked region [Chin. Phys. Lett. 26 （2009） 014301; 29 （2012） 124301]. In this work, we study the performance of the three-dimensional approximate cloaking system based on the transformation acoustics and show that the cloaking effect may be deteriorated at zeroth order Neumann eigenvalues of the concealed region. In particular, transmitted fields into the concealed region can be extremely resonated at frequencies corresponding to the zeroth-order Neumann eigenvalues while scattered fields are suppressed well for any frequency. To enhance the cloaking effect at resonance frequencies, we introduce a lossy medium inside the cloaked region and show that the new proposal can reduce the intensity of transmitted fields significantly due to the lossy medium.

关键词： Eigenvalues and eigenfunctions

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Graphic Sequences and Split Graphs

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Acta Mathematicae Applicatae Sinica 2016年第4期32卷 1005-1014页

作者： Jian-hua YIN lei meng meng-Xiao YIN College of Information Science and Technology Hainan University School of Computer Electronics and InformationGuangxi University

The split graph Kr∨Ks on r＋s vertices is denoted by Sr,s A graphic sequence π = （d1, d2, …, dn） is said to be potentially Sr,s-graphic if there is a realization of π containing Sr,s as a subgraph. In this paper, a simple sufficient condition for π to be potentially Sr,s-graphic is obtained, which extends an analogous condition for π to be potentially Kr＋1-graphic due to Yin and Li （Discrete Math. 301 （2005） 218-227）. As an application of this condition, we further determine the values of δ（Sr,s, n） for n _≥3＋ 3s - 1.

关键词： graphic sequence potentially Kr+1-graphic sequence potentially St.,s-graphic sequence

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Linkage analysis and integrated software GAPL for pure-line populations derived from four-way and eight-way crosses

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The Crop Journal 2019年第3期7卷 283-293页

作者： Luyan Zhang lei meng Jiankang Wang The National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop Sciences Chinese Academy of Agricultural Sciences

Pure lines derived from multiple parents provide abundant variation for genetic ***,efficient genetic analysis methods and user-friendly software are still *** this study, we developed linkage analysis methods and integrated analysis software for pure-line populations derived from four-way and eight-way ***, polymorphic markers are classified into different categories according to the number of identifiable alleles in the inbred *** genotypic probability is then derived for each pair of complete markers, and based on them a maximum likelihood estimate(MLE) of recombination frequency is *** EM algorithm is proposed for calculating recombination frequencies in scenarios that at least one marker is incomplete.A linkage map can thus be constructed using estimated recombination *** describe a software package called GAPL for recombination frequency estimation and linkage map construction in multi-parental pure-line *** simulation studies and results from a reported four-way cross recombinant inbred line population demonstrate that the proposed method and software can build more accurate linkage maps in shorter times than other published software *** GAPL software is freely available from *** and can also be used for QTL mapping in multi-parental populations.

关键词： Pure lines Four-way cross Eight-way cross Recombination frequency estimation Integrated software

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Cross-modal learning using privileged information for long-tailed image classification

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Computational Visual Media 2024年第5期10卷 981-992页

作者： Xiangxian Li Yuze Zheng Haokai Ma Zhuang Qi Xiangxu meng lei meng School of Software Shandong UniversityJinan 250101China

The prevalence of long-tailed distributions in real-world data often results in classification models favoring the dominant classes,neglecting the less frequent *** approaches address the issues in long-tailed image classification by rebalancing data,optimizing weights,and augmenting ***,these methods often struggle to balance the performance between dominant and minority classes because of inadequate representation learning of the *** address these problems,we introduce descriptional words into images as cross-modal privileged information and propose a cross-modal enhanced method for long-tailed image classification,referred to as *** improves the learning of intraclass similarity of tail-class representations by cross-modal alignment and captures the difference between the head and tail classes in semantic space by cross-modal *** fusing the above information,CMLTNet achieved an overall performance that was better than those of benchmark long-tailed and cross-modal learning methods on the long-tailed cross-modal datasets,NUS-WIDE and *** effectiveness of the proposed modules was further studied through ablation *** a case study of feature distribution,the proposed model was better in learning representations of tail classes,and in the experiments on model attention,CMLTNet has the potential to help learn some rare concepts in the tail class through mapping to the semantic space.

关键词： long-tailed classification cross-modal learning representation learning privileged infor-mation

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Ordering of high-density markers by the k-Optimal algorithm for the traveling-salesman problem

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The Crop Journal 2020年第5期8卷 701-712页

作者： Luyan Zhang Huihui Li lei meng Jiankang Wang National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China

Construction of accurate and high-density linkage maps is a key research area of *** investigated the efficiency of genetic map construction(MAP)using modifications of the k-Optimal(k-Opt)algorithm for solving the traveling-salesman problem(TSP).For TSP,different initial routes resulted in different optimal *** most optimal solution could be found only by use of as many initial routes as *** for MAP,a large number of initial routes resulted in one optimal order.k-Opt using open route length gave a slightly higher proportion of correct orders than the method of adding one virtual marker and using closed route *** frequency(REC)and logarithm of odds(LOD)score gave similar proportions of correct order,higher than that given by genetic *** missing markers and genotyping error reduced ordering accuracy,but the best order was still achieved with high probability by comparison of the optimal orders from multiple initial *** time increased rapidly with marker number,and 2-Opt took much less time than *** 2-Opt algorithm was compared with ordering methods used in two other software *** best method was 2-Opt using open route length as the criterion to identify the optimal order and using REC or LOD as the measure of distance between *** describe a unified software interface for using k-Opt in high-density linkage map construction for a wide range of genetic populations.

关键词： optimal algorithm traveling

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Quantitative evaluation of soil erosion of land subsided by coal mining using RUSLE

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International Journal of Mining Science and Technology 2012年第1期22卷 7-11页

作者： meng lei Feng Qiyan Wu Kan meng Qingjun Internet of Things(Mine Perception)Research Center China University of Mining&TechnologyXuzhou 221008China School of Environment and Spatial lnformatics China University of Mining&TechnologyXuzhou 221116China Jiangsu Key Laboratory of Resources and Environmental Information Engineering Xuzhou 221116China

Based on a RUSLE model, we identified the key factors of the impact on soil erosion induced by coal min- ing subsidence. We designed a method for predicting/.S factors of a mining subsidence basin, using ana- lytical GIS spatial technology. Using the Huainan mining area as an example, we calculated the modulus of erosion, its volume and classified the grade of soil erosion for both the original area and the subsidence basin. The results show that the maximum modulus of erosion and the volume of erosion of the subsi- dence basin without water logging would increase by 78% and 23% respectively compared with the ori- ginal situation. The edge of the subsidence basin, where the land subsidence was uneven, is subject to the greatest acceleration in soil erosion. In the situation of water logging after subsidence, the maximum modulus of erosion would decrease if the accumulated slope length were reduced. This maximum mod- ulus around the water logged area within the subsidence basin is equal to that without water logging, while the total volume of erosion decreases. Therefore, mining subsidence aggravates soil erosion espe- cially at the edge of basins where water and soil conservation measures should be taken.

关键词： RUSLE Coal mining subsidence Soil erosion Quantitative evaluation

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QTL IciMapping:Integrated software for genetic linkage map construction and quantitative trait locus mapping in biparental populations

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The Crop Journal 2015年第3期3卷 269-283页

作者： lei meng Huihui Li Luyan Zhang Jiankang Wang The National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop Science and CIMMYT China OfficeChinese Academy of Agricultural Sciences

QTL Ici Mapping is freely available public software capable of building high-density linkage maps and mapping quantitative trait loci(QTL) in biparental populations. Eight functionalities are integrated in this software package:(1) BIN: binning of redundant markers;(2) MAP: construction of linkage maps in biparental populations;(3) CMP: consensus map construction from multiple linkage maps sharing common markers;(4) SDL: mapping of segregation distortion loci;(5) BIP: mapping of additive, dominant, and digenic epistasis genes;(6) MET: QTL-by-environment interaction analysis;(7) CSL: mapping of additive and digenic epistasis genes with chromosome segment substitution lines; and(8) NAM: QTL mapping in NAM populations. Input files can be arranged in plain text, MS Excel 2003, or MS Excel 2007 formats. Output files have the same prefix name as the input but with different extensions. As examples, there are two output files in BIN, one for summarizing the identified bin groups and deleted markers in each bin, and the other for using the MAP functionality. Eight output files are generated by MAP, including summary of the completed linkage maps, Mendelian ratio test of individual markers, estimates of recombination frequencies, LOD scores, and genetic distances, and the input files for using the BIP, SDL,and MET functionalities. More than 30 output files are generated by BIP, including results at all scanning positions, identified QTL, permutation tests, and detection powers for up to six mapping methods. Three supplementary tools have also been developed to display completed genetic linkage maps, to estimate recombination frequency between two loci,and to perform analysis of variance for multi-environmental trials.

关键词： Biparental populations Map construction QTL mapping Software

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