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Journal of Energy Chemistry 2018年第3期27卷 690-702页

作者： Wu-Qiang Wu Jin-Feng Liao dai-bin kuang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-sen University.Guangzhou 510275Guangdong.China

Nanostructured TiO2 with differentiate morphologies has attracted tremendous attention due to its wide band-gap nature as well as outstanding optical and electric properties for solar-driven light-toelectricity conversion application. Layered-stacking TiO2 film such as double-layer, tri-layer, quadrupleor quintuplicate-layer, is highly desirable to the design of high-performance semiconductor material photoanodes and the development of advanced photovoltaic devices. In this minireview, we will summarize the recent progress and achievements on proof-of-concept of layered-stacking TiO2 films（LTFs） for solar cells with emphasis on the tailored properties and synergistic functionalization of LTFs, such as optimized sensitizer adsorption, broadened light confinement as well as facilitated electron transport *** demonstrations of LTFs photovoltaic systems provide lots of possibilities and flexibilities for more efficient solar energy utilization that a wide variety of TiO2 with distinguished morphologies can be integrated into differently structured photoanodes with synergistic and complementary advantages. This key structure engineering technology will also pave the way for the development of next generation state-ofthe-art electronics and optoelectronics. Finally, from our point of view, we conclude the future research interest and efforts for constructing more efficient LTFs as photoelectrode, which will be highly warranted to advance the solar energy conversion process.

关键词： TiO2 Charge transport Light scattering Power conversion efficiency Solar cells

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

Plasmonic CsPbBr_(3)–Au nanocomposite for excitation wavelength dependent photocatalytic CO_(2) reduction

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Journal of Energy Chemistry 2021年第2期30卷 309-315,I0011页

作者： Jin-Feng Liao Ya-Ting Cai Jun-Yan Li Yong Jiang Xu-Dong Wang Hong-Yan Chea dai-bin kuang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510217GuangdongChina

The optoelectronic performance of CsPbBr_3 nanocrystal(NC) has been dramatically limited by the severe charge carrier recombination and its narrow light absorption range,which are anticipated to be resolved via coupling with plasmonic Au nanoparticle(NP).In view of this,CsPbBr_3-Au nanocomposite is fabricated and further employed as a concept model to study the electronic interaction between perovskite NC and Au NP for the first *** has been found that the excitation-wavelength dependent carrier transfer behavior exists in CsPbBr_3-Au *** illumination with visible light(λ>420 nm),photo-generated electrons in CsPbBr_3 can inject into Au with an electron injection rate and efficiency of 2.84×10~9 s^(-1) and 78%,*** boosted charge separation is further translated into a 3.2-fold enhancement in CO_2 photocatalytic reduction activity compared with pristine CsPbBr_*** the other hand,when solely exciting Au NP with longer wavelength light(λ>580 nm),the localized surface plasmon resonance(LSPR) induced hot electrons in Au NPs can transfer to CsPbBr_3 NC and further participate in photocatalytic reaction towards CO_2 *** present study provides new insights into preparing plasmonic nanostructure to enhance the performance of perovskite based optoelectronic devices.

关键词： Perovskite Gold nanoparticle Photocatalysis Localized surface plasmon resonance

A facile method to fabricate high-quality perovskite nanocrystals based on single crystal powder

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Nano Research 2019年第10期12卷 2640-2645页

作者： Jin-Feng Liao Yi-Xin Chen Jun-Hua Wei Ya-Ting Cai Xu-Dong Wang Yang-Fan Xu dai-bin kuang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China

Although great advancements have been successfully achieved in ligand-assisted reprecipitation strategy(LARP)towards lead halide perovskite nano crystals(NCs)syn thesis,it still remains challe nging to develop bright and stable iodide-based perovskite NC via facile ***,striki ngly bright MAPbl3 NCs with photoluminesce nee qua ntum yield(PLQY)as high as 79%are synthesized via replacing the raw material(MAI and Pbh)with MAPbl3 crystal powder during LARP *** has been found that crystal powder derived MAPbl3 NCs are more iodide-rich compared with that based on raw material,which is favorable to passivate the surface trap ***,femtosecond transient absorption spectroscopies and space charge limited current measurements have corroborated that the trap density is much less in crystal powder resulted MAPbl3 *** analyses indicate stronger solvation with reduced precursor colloid size has been observed in crystal powder derived precursor solution probably due to the formation of *** work has provided a facile but valid method to enhance the photoluminesce nee of perovskite NC via modulati ng the beginning precursor solution.

关键词： MAPbh nanocrystal perovskite transient absorption light emitting

Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O single crystals for remote optical thermometry

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Science China Materials 2022年第3期65卷 764-772页

作者： Jun-Hua Wei Jian-bin Luo Jin-Feng Liao Wei-Tao Ou dai-bin kuang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China

Zero-dimensional metal halide perovskites have captured intense research interest owing to their unique optoelectronic ***,metal halides with the ns^(2) electronic configuration are of great interest owing to the high-temperature sensitivity of their photoluminescence,which could be applied to remote optical thermometry(ROT).Herein,all-inorganic and lead-free halide perovskite Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O single crystals(SCs)were prepared through the hydrothermal method and showed a strong temperature dependence of photoluminescence *** Te^(4+) doping,the nonemissive Cs_(2)InCl_(5)·H_(2)O SC exhibits a bright orange emission at 660 nm with a wide full width at half maximum of 180 *** strong phonon-exciton coupling promotes the formation of self-trapped excitons in the soft lattice of the zero-dimensional Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O *** Te^(4+) ions with the 5 s^(2) electronic configuration endow the Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O SC with a strong temperaturedependent photoluminescence *** SC reaches a maximum specific sensitivity of 0.062 K^(-1) at 320 K,thereby showing the potential advantages of indium-based metal halide perovskites in ROT applications.

关键词： metal halide perovskite remote optical thermometry photoluminescence lead-free

Construction of a ternary WO_(3)/CsPbBr_(3)/ZIF-67 heterostructure for enhanced photocatalytic carbon dioxide reduction

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Science China Materials 2022年第6期65卷 1550-1559页

作者： Yu-Jie Dong Yong Jiang Jin-Feng Liao Hong-Yan Chen dai-bin kuang Cheng-Yong Su MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Lehn Institute of Functional MaterialsSchool of ChemistrySun Yat-sen UniversityGuangzhou 510006China

Using halide perovskite nanomaterials for solarto-fuel conversion has recently attracted a lot of attention due to their excellent photoelectric ***,severe photogenerated charge carrier recombinations and poor reaction kinetics greatly restrict their photocatalytic *** this study,a ternary WO_(3)/CsPbBr_(3)/ZIF-67 heterostructure was designed for efficient CO_(2) *** results indicate that the Z-scheme charge transfer pathway constructed between WO_(3)and CsPbBr_(3)ensures the effective transfer and separation of photogenerated charge ***,the subsequent surface modification of zeolitic imidazolate frameworks(ZIF-67)with active Co centers further benefits CO_(2)adsorption and ***,the synergistic effects of charge separation and CO_(2)uptake greatly promote the photocatalytic *** optimal WO_(3)/CsPbBr_(3)/ZIF-67 heterostructure yields a CO production of 99.38μmol g^(−1)in 3 h,which is 6.8 times of that produced by CsPbBr_(3).This work will inspire new insights in developing efficient photocatalysts for CO_(2)reduction and even more challenging photocatalytic reactions by elaborately regulating the functional ingredient.

关键词： Z-scheme heterojunction halide perovskite CO_(2)photoreduction heterostructure charge separation

Novel phenanthroline-based ruthenium complexes for dye-sensitized solar cells:enhancement in performance through fluoro-substitution

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Novel phenanthroline-based ruthenium complexes for dye-sensi...

第二届新型太阳能电池学术研讨会

作者： Qiong-Yan Yu Jian-Feng Huang Yong Shen Li-Min Xiao Jun-Min Liu dai-bin kuang Cheng-Yong Su Henan Institute of Engineering

Three new ruthenium sensitizers [Ru(H2dcbpy)(L)(NCS)] [H2dcbpy= 4,4,-dicarboxylic acid-2,2,-bipyridine, and LX= 2-(4-fluorophenyl)-1H-imidazo[4,5-f][1,10]phenanthroline(Ru L), 4-(1H-imidazo[4,5-f][1,10]phe-nanthrolin-2-yl)-N,N-dimethylaniline(Ru L), or 2-(4-methylphenyl)-1H-imidazo[4,5-f][1,10]phenanthroline(Ru LC)], have been designed and synthesized. Under standard global AM 1.5 solar conditions, the device using the Ru LF sensitizer gave a conversion efficiency of 7.28%, compared to 7.50% optimized for the N719 dye. The power-conversion efficiency of Ru L is 24% and 66% higher than those of Ru L and Ru L, respectively, due to a remarkable fluoro-substitution effect. The origins of this effect have been thoroughly investigated by spectroscopic, electrochemical, and density functional theory(DFT) studies. Our results show the fluoro-substitution serves as the key factor for improving the device performance, the role of which is to increase the dye density on Ti O 2, alter the molecular packing, and tune the electron donating property. These findings may provide an alternative strategy for the design of a new type of ruthenium sensitizer by the introduction of C–F bonds to the auxochromic ligand to improve the device performance.

关键词： dye-sensitized solar cells ruthenium complexes fluoro-substitution

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基于数据挖掘技术的拖拉机发动机故障诊断

农机化研究 2025年第2期47卷 244-248页

作者：匡伟祥郴州职业技术学院现代装备制造学院湖南郴州423000

拖拉机是农业生产的重要工具,发动机是其核心部件,如发动机出现故障,将会直接影响农业生产效率和产量。为此,提出了一种使用数据挖掘技术进行拖拉机发动机故障诊断的方法。利用了机器学习技术和统计学,首先针对拖拉机田间运行信号噪音... 详细信息

拖拉机是农业生产的重要工具,发动机是其核心部件,如发动机出现故障,将会直接影响农业生产效率和产量。为此,提出了一种使用数据挖掘技术进行拖拉机发动机故障诊断的方法。利用了机器学习技术和统计学,首先针对拖拉机田间运行信号噪音较大的问题,引入小波阈值去噪的方法;其次,基于卷积神经网络模型,引入一种注意力机制,提高故障诊断准确率,并通过对拖拉机传感器数据进行分析,可以帮助诊断和预测发动机故障;最后,通过实验结果验证了算法的有效性。研究结果不仅可以提高故障的准确性和效率,还能够节约维修成本和提高机器的利用率,具有较高的应用价值。

关键词：拖拉机发动机故障诊断数据挖掘技术机器学习特征选择

Synthesis and Crystal Structure of a Novel Manganese Coordination Polymer Constructed by 3,5-Dimethylbenzoic Acid with 4,4'-Bipyridine

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Chinese Journal of Structural Chemistry 2006年第10期25卷 1213-1216页

作者： ZHANG Chun-Hua CHEN Man-Sheng kuang dai-Zhi Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China

A novel manganese coordination polymer [Mn（L）2（bipy）]n （HL = 3,5-dimethylbenzoic acid, 4,4＇-bipy = 4,4＇-bipyridine） has been synthesized by a hydrothermal method. The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group C2/c with a = 2.0996（8）, b = 1,1835（5）, c = 0.9958（4） nm, β = 110.161（5）°, V = 2,3229（16） nm^3, Z = 4, C28H26MnN2O4, Mr = 509.45, Dc= 1.457 g/cm^3,μ = 0.607 mm^-1, F（000） = 1060, Rim = 0.0566, R = 0.0334 and wR = 0.1078. In the crystal the manganese atom is six-coordinated by two nitrogen atoms from 4,4＇-bipy and four oxygen atoms from 3,5-dimethylbenzolate molecules, completing an octahedral geometry. The 4,4＇-bipy molecules bridge the infinite chain [Mn（L）2（bipy）]n to form a two-dimensional layer.

关键词： manganese coordination polymer hydrothermal synthesis crystal structure

Enhanced frameless slotted ALOHA protocol with Markov chains analysis

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Science China(Information Sciences) 2018年第10期61卷 187-197页

作者： dai JIA Zesong FEI Ming XIAO Congzhe CAO Jingming kuang School of Information and Electronics Beijing Institute of Technology School of Electrical Engineering Royal Institute of Technology Department of Electrical and Computer Engineering University of Alberta

In this paper, we propose a novel approach to enhance the performance of frameless slotted ALOHA(SA) protocol. We employ signature codes to help the receiver identify the packets contained in collisions, and use successive interference cancellation(SIC) for packet recovery. We model the proposed scheme as a two-state Markov model represented by a uni-partite graph. We evaluate the throughput,expected delay and average memory size of the proposed scheme, and optimize the proposed scheme to maximize the throughput. We show that the theoretical analysis matches well with simulation *** throughput and expected delay of the proposed protocol outperform the conventional slotted ALOHA protocol significantly.

关键词： slotted ALOHA SIC Markov chain uni-partite graph throughput delay