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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

Mesonic condensation in isospin matter under rotation

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Chinese Physics C 2020年第11期44卷 1-6页

作者： Hui Zhang Defu Hou jin-feng liao Institute of Particle Physics(IOPP)and Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China Guangdong Provincial Key Laboratory of Nuclear Science Institute of Quantum MatterSouth China Normal UniversityGuangzhou 510006China Physics Department and Center for Exploration of Energy and Matter Indiana University2401 N Milo B.Sampson LaneBloomingtonIN 47408USA

We investigate mesonic condensation in isospin matter under *** the two-flavor NJL effective model in the presence of global rotation,we demonstrate two important effects of rotation on its phase structure:a rotational suppression of the scalar-channel condensates,in particular,the pion condensation region;and a rotational enhancement of the rho condensation region with vector-channel condensate.A new phase diagram for isospin matter under rotation is mapped out on the ω−μI plane where the three distinct phases,corresponding to the σ,π,ρ-dominated regions,respectively,are separated by a second-order line at low isospin chemical potential as well as a first-order line at high rotation and are further connected at a tri-critical point.

关键词： phase structure rotating isospin matter mesonic condensate

Can the efficiencies of simplified perovskite solar cells go higher?

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Journal of Energy Chemistry 2021年第7期30卷 33-36页

作者： jin-feng liao Wenhuai feng Jun-Xing Zhong Bing-Xin Lei Wu-Qiang Wu Key Laboratory of Bioinorganic and Synthetic Chemistry(MOE) School of ChemistrySun Yat-sen UniversityGuangzhou 510275GuangdongChina School of Chemistry and Chemical Engineering Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan ProvinceHainan Normal UniversityHaikou 571158HainanChina

In recent years, metal halide perovskites have emerged as star semiconducting materials in the field of optoelectronic devices owing to their fascinating optoelectronic properties. Of particular interest are perovskite solar cells (PSCs), which have witnessed skyrocketing power conversion efficiencies (PCEs) within a short period of time, and were recently certified to reach 25.5%, which is already higher than other thin film photovoltaic technologies[1]. Nevertheless, multiple layers are still needed for state-of-theart PSCs to achieve high PCEs over 21%.

关键词： Perovskite solar cells Charge extraction Charge recombination Interfacial modification Energy level alignment

Full-color-tunable phosphorescence of antimony-doped lead halide single crystal

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npj Flexible Electronics 2022年第1期6卷 613-620页

作者： jin-feng liao Zhipeng Zhang Bingzhe Wang Zikang Tang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacao 999078China

Although multiple emissive phosphors are of great fundamental interest and practical importance,it is still challenging to achieve full-color tunable luminescence in a single-component ***,we present an antimony-doped lead halide single crystal(C10NH22)2PbBr4:Sb3+with widely tunable red/green/blue/white *** Sb3+dopants provide host another active sites to capture photo-generated excitons,thus triggering blue/red dual ***,a reversible thermal-induced phase transition transforms blue/red emission into green/red dual *** two phases exhibit intriguing excitation-wavelength dependent emission,affording a whole color gamut covering the red-green-blue(RGB)color triangle on the CIE 1931 *** and theoretical calculation studies reveal two emitters work independently,which paves the way for the multimode optical control and promotes the development of multifunctional luminescent materials.

关键词： tunable dopant crystal

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

Enhancing Deepfake Detection:Proactive Forensics Techniques Using Digital Watermarking

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Computers, Materials & Continua 2025年第1期82卷 73-102页

作者： Zhimao Lai Saad Arif Cong feng Guangjun liao Chuntao Wang School of Automation Guangdong University and TechnologyGuangzhou510006China School of Immigration Administration(Guangzhou) China People’s Police UniversityGuangzhou510663China Department of Mechanical Engineering College of EngineeringKing Faisal UniversityAl Ahsa31982Saudi Arabia Cyber Police Division Guangzhou Public Security BureauGuangzhou510030China School of Forensic Science and Technology Guangdong Police CollegeGuangzhou510320China College of Mathematics and Informatics South China Agricultural UniversityGuangzhou510642China

With the rapid advancement of visual generative models such as Generative Adversarial Networks(GANs)and stable Diffusion,the creation of highly realistic Deepfake through automated forgery has significantly *** paper examines the advancements inDeepfake detection and defense technologies,emphasizing the shift from passive detection methods to proactive digital watermarking *** detection methods,which involve extracting features from images or videos to identify forgeries,encounter challenges such as poor performance against unknown manipulation techniques and susceptibility to counter-forensic *** contrast,proactive digital watermarking techniques embed specificmarkers into images or videos,facilitating real-time detection and traceability,thereby providing a preemptive defense againstDeepfake *** offer a comprehensive analysis of digitalwatermarking-based forensic techniques,discussing their advantages over passivemethods and highlighting four key benefits:real-time detection,embedded defense,resistance to tampering,and provision of legal ***,the paper identifies gaps in the literature concerning proactive forensic techniques and suggests future research directions,including cross-domain watermarking and adaptive watermarking *** systematically classifying and comparing existing techniques,this review aims to contribute valuable insights for the development of more effective proactive defense strategies in Deepfake forensics.

关键词： Deepfake proactive forensics digital watermarking traceability detection techniques

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

Fatigue Strength Analysis of Dissimilar Aluminum Alloy TIG Welds

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 265-274页

作者： liao Xiangyun WANG Ruijie LIU Guoshou ZHAO Pinglin Faculty of Mechanical and Electrical Engineering Kunming University of Science and TechnologyKunming 650500China Faculty of Civil Engineering and Mechanics Kunming University of Science and TechnologyKunming 650500China

The constant amplitude loading fatigue tests were carried out on the 6061/7075 aluminum alloy TIG fillet welded lap specimens in this study,and the weld seam cross-section hardness was *** experimental results show that most specimens mainly failed at the 7075 side weld toes even though the base material tensile strength of 7075 is higher than that of *** maximum stress-strain concentration in the two finite element models is located at the 7075 side weld toe,which is basically consistent with the actual fracture *** weld zone on the 7075 side experiences severe material softening,with a large ***,the Vickers hardness value on the 6061 side negligibly changes and fluctuates around 70 *** obvious defects are found on the fatigue fracture,but a large number of secondary cracks *** germinate from the weld toe and propagate in the direction of the plate *** reinforcement has a serious impact on fatigue *** life will decrease exponentially as the weld reinforcement increases under low *** is found that the notch stress method can give a better fatigue life prediction for TIG weldments,and the errors of the predicted results are within the range of two factors,while the prediction accuracy decreases under low *** equivalent structural stress method can also be used for fatigue life prediction of TIG weldments,but the errors of prediction results are within the range of three factors,and the accuracy decreases under high stress.

关键词： TIG welding notch stress method equivalent structural stress method fatigue life finite element analysis