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Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

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Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang Fei Long liyuan Han Qifeng Han Yi‑Bing Cheng Yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

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Vibration and Buckling Analysis of Piezoelectric Nanowires Based on Surface Energy Density

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Acta Mechanica Solida Sinica 2021年第3期34卷 425-436页

作者： liyuan Wang Hongjun Han Key Laboratory of Mechanics on Disaster and Environment in Western China the Ministry of EducationCollege of Civil Engineering and MechanicsLanzhou UniversityLanzhou 730000China Longqiao College of Lanzhou University of Finance and Economics Lanzhou 730101China

In this paper,the influences of surface effects on free transverse vibration and buckling of piezoelectric nanowires are investigated by surface energy density elasticity *** relations are given for the natural frequencies of nanowires by taking into account the effects of surface energy density and surface relaxation *** implementing this theory with consideration of surface effects under clamped-clamped boundary conditions,the natural frequencies of nanowires are *** is shown that the natural frequency depends on both the surface effects and piezoelectricity.A closed-form solution is also obtained to calculate the critical buckling *** study is expected to provide useful insights for the design of piezoelectric nanowire-based nanodevices.

关键词： Surface effects Piezoelectric nanowires Vibration Buckling Natural frequency Critical electric potential

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福州鼓山地区A型花岗岩中碱性暗色矿物特征及其地质意义

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岩石学报 2025年第1期41卷 112-134页

作者：邓心禾王力圆徐净陈素余福州大学紫金地质与矿业学院福州350108

岩浆作用的不同时期、不同种属的碱性暗色矿物的矿物学信息能反演岩浆演化过程。本文对福建福州鼓山地区的晶洞花岗岩进行了主微量元素、锆石U-Pb同位素定年、Lu-Hf同位素分析,并对其特征暗色矿物进行了电子探针微区分析。鼓山花岗岩发... 详细信息

岩浆作用的不同时期、不同种属的碱性暗色矿物的矿物学信息能反演岩浆演化过程。本文对福建福州鼓山地区的晶洞花岗岩进行了主微量元素、锆石U-Pb同位素定年、Lu-Hf同位素分析,并对其特征暗色矿物进行了电子探针微区分析。鼓山花岗岩发育典型的钠铁闪石、霓石等碱性暗色矿物,地球化学特征表现为高硅、富碱、贫镁钙、低铁铝,属于准铝质到过碱质岩石;其LREE富集,HREE亏损,具有Eu负异常的特征,均显示K、Rb、Th、U等元素相对富集,Ba、Sr以及高场强元素Nb、Ta、P、Ti相对亏损,为典型的高分异的碱性A型花岗岩。LA-ICP-MS锆石U-Pb年龄在95Ma左右,指示其形成时代为晚白垩世早期。锆石的平均ΔFMQ=+5.36,表明岩浆具有较高的氧逸度,钠铁闪石和霓石等碱性暗色矿物形成于岩浆演化的晚期阶段。霓石显示出其高硅、高钠、高铁,低钛、镁、铝、锰的特征。钠铁闪石具有富碱、高铁、多硅、贫钙的特征。碱性花岗岩的锆石ε_(Hf)(t)值范围为-1.8~+5.4,二阶段模式年龄t DM2为810~1278Ma,岩浆源区为同期底侵的富集地幔来源的陆壳岩石在高温下部分熔融形成,形成于太平洋板块俯冲后撤背景下的伸展环境。

关键词：福州鼓山 A型花岗岩霓石钠铁闪石岩石成因

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Research activities on perovskite solar cells in China

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Science China Chemistry 2019年第7期62卷 822-828页

作者： Yanbo Wang liyuan Han State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong University

Perovskite solar cells(PSCs) have attracted much attention because of their high efficiencies and low costs for *** academic research started late in China, compared to that in Europe and Korea, the majority of active PSC research is now conducted in China;furthermore, Chinese research groups currently hold the certified highest efficiency record for both an individual PSC and a PSC module. China is also the world’s largest supplier of solar modules, making it a promising country in which to realize the commercialization of PSCs. Herein, we review PSC research activities undertaken in China(both academic and industrial) and discuss significant remaining challenges to overcome for early commercialization of PSCs. We propose that research activities shift away from material and device structure development toward improving PSC stability and developing methods for large-area module fabrication. In addition, we suggest that a recognized certification center is urgently needed in China to further accelerate PSC research.

关键词： perovskite solar cell high efficiency stability commercialization China

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Characterization of Microstructure of Permanent Mold Cast Zinc Alloy ZA27

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材料热处理学报 2004年第5期25卷 174-179页

作者： CHENTi-jun liyuan-dong HAOYuan StateKeyLabofAdvancedNonferrousMaterials LanzhouUniversityofTechnologyLanzhouChina

The microstructure of permanent mold cast zinc alloy ZA27 was examined by SEM and TEM after natural aging for 18 months. It was found that the primary a’ phase, peritectic and eutectic phases all decomposed into the equilibrium well-formed a+r| lamellae or irregular a+T| structure through cellular reaction. The cell colonies nucleated on the interdendritic eutectic T| layer and grew into the primary dendrites, thus first making the phase in the dendrite edges decompose, and then the a’ phase in the dendrite cores. The products from the a’ phase appeared in regular lamellae rather than irregular particles. In addition, a fine, dense transitional phase a’m containing 27.8 mass% Al, with a fee crystal structure and lattice parameter of about 0.4013nm, formed in lamellae. Copper was preferentially concentrated in Zn-rich n phase and existed in the form of Cu-rich e phase (CuZo,) particles, with hep crystal structure and parameters a=0.274nm, c=0.429nm and c/a=l .567.

关键词：显微结构硬模铸造 ZA27合金 SEM TEM

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Impact of Background Dynamic and Thermodynamic States on Distinctive Annual Cycle of Near-Equatorial Tropical Cyclogenesis over the Western North Pacific

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Journal of Meteorological Research 2020年第4期34卷 822-835页

作者： liyuan DENG Tim LI Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science&TechnologyNanjing 210044China International Pacific Research Center and Department of Atmospheric Sciences School of Ocean and Earth Science and TechnologyUniversity of HawaiiHonoluluHI 96822USA

In a sharp contrast to tropical cyclone(TC) genesis over the main development region of the western North Pacific(WNP), near-equatorial(0°-5°N) TCs exhibit a distinctive annual cycle, peaking in boreal winter and being inactive in boreal summer. The relative roles of dynamic and thermodynamic background states on near-equatorial TCs formation were investigated based on the observational diagnosis of the genesis potential index(GPI) and high-resolution model simulations. It is found that the background vorticity makes a major contribution to the distinctive annual cycle, while mean temperature and specific humidity fields are not critical. Numerical simulations further indicate that seasonal mean cyclonic vorticity in boreal winter has three effects on TC genesis near the equator. First, the environmental cyclonic vorticity interacts with TC vortex to promote a mid-level outflow, which strengthens boundary layer friction induced ascending motion and thus condensational heating. Second, it produces an equivalent Coriolis effect(via enhanced absolute vorticity), which strengthens positive feedback between primary and secondary circulation. Third, it helps to merge small-scale vortical hot towers(VHTs) into a mesoscale core through vorticity segregation process. However, background vorticity in boreal summer has an opposite effect on TC development near the equator.

关键词： near-equatorial tropical cyclone(TC) equivalent Coriolis effect vorticity segregation

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Checklist of the genus Cryphalus Erichson,1836(Coleoptera:Curculionidae:Scolytinae)with special attention to Chinese species

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Zoological Systematics 2020年第3期45卷 176-205页

作者： liyuan Yang College of Forestry Shenyang Agricultural UniversityShenyang 110866China

Checklist of all known species of the bark beetle genus Cryphalus Erichson,1836 is assembled,based on literatures published prior to May 2020.A total of 253 species including 36 species distributed in China is *** of ... 详细信息

关键词： Coleoptera Cryphalini catalogue diversity

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Stabilization of NCSs by random allocation of transmission power to sensors

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Science China(Information Sciences) 2016年第6期59卷 248-260页

作者： liyuan WANG Ge GUO Yan ZHUANG School of Control Science and Engineering Dalian University of Technology School of Information Science and Technology Dalian Maritime University

This study investigates networked control systems(NCSs), whose sensors communicate with remote controllers via a wireless fading channel. The sensor can choose different power levels at which it can transmit its measurement to the controller. The transmission power is selected according to a given probability *** level of transmission power determines the probability of packet loss. The objective of this study is to find an appropriate transmission power probability distribution and a system controller jointly such that NCSs can be exponentially stabilized within a given energy budget. By the average dwell time technique, sufficient conditions for almost sure stability and an optimal sensor power probability distribution maximizing the stability margin are obtained. The effectiveness of the results is demonstrated by numerical simulations.

关键词： networked control systems power allocation packet dropout almost sure stability transmission energy constraint

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Large-eddy structures of turbulent swirling flows and methane-air swirling diffusion combustion

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Acta Mechanica Sinica 2005年第5期21卷 419-424页

作者： liyuan Hu Lixing Zhou Jian Zhang Department of Engineering Mechanics Tsinghua University Beijing100084 China

Turbulent swirling flows and methane-air swirling diffusion combustion are studied by large-eddy simulation （LES） using a Smagorinsky-Lilly subgrid scale turbulence model and a second-order moment （SOM） SGS combustion model, and also by RANS modeling using the Reynolds Stress equation model with the IPCM＋wall and IPCM pressure-strain models and SOM combustion model. The LES statistical results for swirling flows give good agreement with the experimental results, indicating that the adopted subgrid-scale turbulence model is suitable for swirling flows. The LES instantaneous results show the complex vortex shedding pattern in swirling flows. The initially formed large vortex structures soon break up in swirling flows. The LES statistical results of combustion modeling are near the experimental results and are as good as the RANS-SOM modeling results. The LES results show that the size and range of large vortex structures in swirling combustion are different from those of isothermal swirling flows, and the chemical reaction is intensified by the large-eddy vortex structures.

关键词： Swirling combustion . Swirling flows .Large-eddy simulation

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Sampled-Data Consensus Control of MUSV Systems with Channel Fading and Transmission Delay

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China Communications 2020年第3期17卷 36-45页

作者： liyuan Wang Wei Yue Rubo Zhang Key Laboratory of Intelligent Perception and Advanced Control of State Ethnic Affairs Commission Dalian Minzu UniversityDalian 116600China College of Mechanical and Electronic Engineering Dalian Minzu UniversityDalian 116600China Marine Electrical Engineering College Dalian Maritime UniversityDalian 116026China

This paper studies sampled-data consensus control of a collection of unmanned surface vehicles(USV)operating in network environments with fading channels and time-varying transmission *** channel fading is modeled as each independent stochastic process whose probability distribution is *** considering the effects of channel fading and transmission delay from sampler to the controller,a new MUSV system model is formulated in the framework of *** the novel established model,stability analysis is given at first,then the sampled-data consensus controller is designed,which also extends to the robust control with wave-induced *** effectiveness of the presented method is demonstrated by numerical simulation.

关键词： consensus sampled-data unmanned surface vehicle fading channel time delay

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