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Overcoming the Limitation of Cs_(2)AgBiBr_(6) Double Perovskite Solar Cells Through Using Mesoporous TiO_(2) Electron Extraction Layer

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Energy & Environmental Materials 2022年第4期5卷 1317-1322页

作者： Dandan Zhao Chao Liang Bingzhe Wang Tanghao Liu Qi Wei Kaiyang Wang Hao Gu Sisi Wang shiliang mei Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipa Macao 999078China

Lead-free double perovskite Cs_(2)AgBiBr_(6) has gained increasing attention ***,the power conversion efficiency(PCE)of Cs_(2)AgBiBr_(6) perovskite solar cells(PSCs)is still low compared with their lead-based ***,by using photoluminescence(PL),time-resolved photoluminescence(TRPL),and ultrafast transient absorption(TA)measurements,the unbalance between the electron and hole in diffusion and transfer,which limits the performance of the Cs_(2)AgBiBr_(6) PSCs,was further *** this issue,a strategy of using the mesoporous TiO_(2) electron transport layer(ETL)to construct a bulk heterojunction in Cs_(2)AgBiBr_(6) PSCs was ***,the PCE had improved by over 24%comparing with that only used compact TiO_(2) ***,based on mesoporous TiO_(2),the unencapsulated Cs_(2)AgBiBr_(6) PSCs maintained 90%of their initial performance after approximately 1200 h of storage in a desiccator(humidity~30%).This work gives further understanding of Cs_(2)AgBiBr_(6) perovskite and demonstrates that a proper design of balancing the electron and hole diffusion can improve device performance.

关键词： bulk heterostructure charge carrier dynamics Cs_(2)AgBiBr_(6) lead-free double perovskite solar cells

Constructing bimodal nanoprobe based on Gd:AgInS_(2)/ZnS quantum dots for fluorometric/magnetic resonance imaging in mesenchymal stem cells

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Journal of Materials Science & Technology 2023年第17期148卷 116-122页

作者： Dan Yang Xian Wei Zhiyan Piao Zhongjie Cui Haiyang He Zhuoqi Wen Wanlu Zhang Le Wang shiliang mei Ruiqian Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China College of Electronic and Optical Engineering&College of Flexible Electronics Nanjing University of Posts and TelecommunicationsNanjing 210023China Academy for Engineering and Technology Fudan UniversityShanghai 200433China Zhongshan-Fudan Joint Innovation Center Zhongshan 528437China Yiwu Research Institute of Fudan University Yiwu 322000China

Mesenchymal stem cells(MSCs)hold great promise in regenerative medicine and received overwhelm-ing concerns to promote their therapeutic *** to the shortage of MSCs-specific biomarkers,bimodal imaging nanoprobes with integrated complementary information are of great importance in ameliorating the efficacy of MSCs terminal *** this study,a noninvasive dual-mode imaging nanoprobe with enhanced detection sensitivity and spatial resolution based on alloyed Gd:AgInS_(2)/ZnS quantum dots(QDs)was first fabricated through a microwave-assisted heating *** QDs with red emissive fluorescence exhibit excellent biocompatibility in MSCs under a confocal *** for magnetic resonance imaging(MRI),the longitudinal relaxation rate of 11.1420 mM^(-1) S^(-1) of Gd:AgInS_(2)/ZnS QDs was achieved,which was 1.7 times higher than that of commercial MRI contrast agent(6.4667 mM^(-1) S^(-1)).Furthermore,the cellular internalization of Gd:AgInS_(2)/ZnS QDs exerts no significant effect on the adipogenesis of MSCs and is conducive to the observation of further adipogenic *** work helps to verify the promising prospect to develop a bimodal nanoprobe of fluorescence/MRI based on Gd:AgInS_(2)/ZnS QDs,which could monitor the differentiation and migration of MSCs for further therapeu-tic approach.

关键词： AgInS_(2)quantum dots Gd doping Dual-mode imaging Mesenchymal stem cells Differentiation

High-performance flexible perovskite photodetectors based on single-crystal-like two-dimensional Ruddlesden-Popper thin films

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Carbon Energy 2023年第2期5卷 250-259页

作者： Chao Liang Hao Gu Junmin Xia Tanghao Liu shiliang mei Nan Zhang Yonghua Chen Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoAvenida da UniversidadeTaipaMacaoPR China Key Laboratory of Flexible Electronics(KLOFE) Jiangsu National Synergetic Innovation Centre for Advanced Materials(SICAM)Institution of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)NanjingJiangsuPR China

Two-dimensional Ruddlesden-Popper(2DRP)perovskites have attracted intense research interest for optoelectronic applications,due to their tunable optoelectronic properties and better environmental stability than their threedimensional ***,high-performance photodetectors based on single-crystal and polycrystalline thin-films 2DRP perovskites have shown great potential for practical ***,the complex growth process of single-crystal membranes and uncontrollable phase distribution of polycrystalline films hinder the further development of 2DRP perovskites ***,we report a series of high-performance photodetectors based on single-crystal-like phase-pure 2DRP perovskite films by designing a novel spacer *** and theoretical evidence demonstrates that phase-pure films substantially suppress defect states and ion *** highly sensitive photodetectors show I_(light)/I_(dark) ratio exceeding 3×10^(4),responsivities exceeding 16 A/W,and detectivities exceeding 3×10^(13) Jones,which are higher at least by 1 order than those of traditional mixed-phase thinfilms 2DRP devices(close to the reported single-crystal devices).More importantly,this strategy can significantly enhance the operational stability of optoelectronic devices and pave the way to large-area flexible productions.

关键词： flexibility photodetectors single-crystal-like stability two-dimensional perovskites

Nanoscale phase management of the 2D/3D heterostructure toward efficient perovskite solar cells

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Science Bulletin 2024年第18期69卷 2853-2861页

作者： Hao Gu Annan Zhu Junmin Xia Wang Li Jiahao Zheng Tao Yang Shengwen Li Nan Zhang shiliang mei Yongqing Cai Shi Chen Chao Liang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacao 999078China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts&Telecommunications(NUPT)Nanjing 210023China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of PhysicsNational Innovation Platform(Center)for Industry-Education Integration of Energy Storage TechnologyXi’an Jiaotong UniversityXi’an 710049China Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China

The stabilization of the formamidinium lead iodide(FAPbI_(3))structure is pivotal for the development of efficient photovoltaic *** two-dimensional(2D)layers to passivate the threedimensional(3D)perovskite is essential for maintaining the a-phase of FAPbI_(3) and enhancing the power conversion efficiency(PCE)of perovskite solar cells(PSCs).However,the role of bulky ligands in the phase management of 2D perovskites,crucial for the stabilization of FAPbI_(3),has not yet been *** this study,we synthesized nanoscale 2D perovskite capping crusts with=1 and 2 Ruddlesden-Popper(RP)perovskite layers,respectively,which form a type-Ⅱ 2D/3D *** heterostructure stabilizes the a-phase of FAPbI_(3),and facilitates ultrafast carrier extraction from the 3D perovskite network to transport contact *** introduced tri-fluorinated ligands to mitigate defects caused by the halide vacancies and uncoordinated Pb^(2+)ions,thereby reducing nonradiative carrier recombination and extending carrier *** films produced were incorporated into PSCs that not only achieved a PCE of 25.39%but also maintained 95%of their initial efficiency after 2000 h of continuous light exposure without *** findings underscore the effectiveness of a phase-pure 2D/3D heterostructure-terminated film in inhibiting phase transitions passivating the iodide anion vacancy defects,facilitating the charge carrier extraction,and boosting the performance of optoelectronic devices.

关键词： Phase-pure 2D perovskite 2D/3D heterostructure Type-II energy alignment Carrier dynamic FAPbI_(3)

Light-induced phase transition and photochromism in all-inorganic two-dimensional Cs2PbI2Cl2 perovskite

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Science China Materials 2020年第8期63卷 1510-1517页

作者： Xiaojun Li Mingming Chen shiliang mei Bingzhe Wang Kaiyang Wang Guichuan Xing Zikang Tang Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078China Department of Physics Jiangsu UniversityZhenjiang 212013China

Organic-inorganic hybrid two-dimensional(2D)ruddlesden-popper(RP)perovskites with fantastic optoelectronic properties and good stability have attracted tremendous attention for the potential applications in photovoltaics and ***,a new allinorganic Cs2PbI2Cl22D perovskite has been proposed with excellent excitonic absorption and improved ambient and thermal ***,an interesting light-induced phase transition and photochromism in the Cs2PbI2Cl2were *** low fluence light pumping,the room temperature photoluminescence(PL)of Cs2PbI2Cl2is dominated by a weak violet excitonic emission peaked at 412 ***,the emission color gradually changes from violet to bright red while increasing the laser pumping *** photochromic effect is determined to be caused by forming CsPbI3phase within the Cs2PbI2Cl2crystals,which is efficiently driven by thermal *** to protection by the Cs2PbI2Cl2matrix,the embedded CsPbI3nanocrystals show improved stability than standard pure ***,the Cs2PbI2Cl2perovskite with photochromic feature may find applications in optical encryption,as preliminarily shown in this work.

关键词： Cs2PbI2Cl2 light-induced phase transition photochromism optical encryption

非Born—Oppenheimer近似(Ⅱ)——广义Berlin面

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山东大学学报（自然科学版） 1989年第2期24卷 48-58页

作者：丁世良舒延凌梅良模山东大学化学系山东大学物理系

本文用非Born—Oppenheimer近似修改了双原子分子的Berlin面方程,从而电子的“束缚区”和“反束缚区”不仅与原子核的电荷和振动能级有关,而且还与核的质量和所有的电子在多维空间中的平均位置随核间距离的变化率有关。

关键词：原子核振动近似

Atomic packing and short-to-medium range order evolution of Zr-Pd metallic glass

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Chinese Science Bulletin 2011年第36期56卷 3908-3911页

作者： QI Li LIU mei ZHANG shiliang ZHANG XinYu TAN ChunLin State Key Laboratory of Metastable Materials Science ＆ Technology Yanshan University Qinhuangdao 066004 China

A larger-scale Zr70Pd30 alloy system has been simulated using molecular dynamics (MD) to investigate structure evolution in Zr70Pd30 metallic glass. The simulated pair distribution function of Zr70Pd30 metallic glass agrees well with the experimental results. Voronoi polyhedron analysis indicates that the icosahedra are not randomly distributed in space,but form characteristic intercrossed icosahedral clusters with medium-range order. Intercrossed icosahedral clusters are the dominant local configurations in Zr70Pd30 metallic glass and probably cause the quasicrystalline phase discovered in Zr70Pd30 metallic glass.

关键词：金属玻璃中程 Voronoi 演化包装原子二十面体分子动力学

一锅法制备三元ZnCdTe/ZnS量子点及其在照明中应用研究

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中国照明电器 2019年第6期 1-7页

作者：刘久诚魏娴魏畅梅时良谭振坤张万路复旦大学信息科学与工程学院光源与照明工程系上海200433 河南教育报刊社河南郑州450044

Cd系量子点由于其量子产率高,光谱调谐方便,成为世界各国科学家研究的热点;目前已经在生物荧光,传感,太阳能电池等领域有了很大的进展,但是Cd元素的毒性一直是限制其大规模应用的瓶颈。目前,降低含Cd量子点毒性的方法主要有两种:包覆保... 详细信息

Cd系量子点由于其量子产率高,光谱调谐方便,成为世界各国科学家研究的热点;目前已经在生物荧光,传感,太阳能电池等领域有了很大的进展,但是Cd元素的毒性一直是限制其大规模应用的瓶颈。目前,降低含Cd量子点毒性的方法主要有两种:包覆保护层和采用合金化。二元CdTe量子点的制备技术以及包覆技术已较为成熟,但是三元量子点的研究相对比较少,目前的制备技术大多比较复杂,成本较高,不适合规模化生产。本文采用溶剂热法,以巯基乙酸(TGA)作为稳定剂,通过包覆与合金化相结合的手段,成功在高温下制备了量子产率高,性能稳定,发射波长能够覆盖可见光区域的水溶性ZnCdTe量子点。

关键词：三元量子点合金包覆照明

荧光定量PCR(qPCR)检测“漂浮型”浒苔微观繁殖体

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海洋科学进展 2025年第1期43卷 188-199页

作者：张宝堂肖洁马晓君缪晓翔李梅范士亮臧宇张学雷王宗灵自然资源部第一海洋研究所山东青岛266061 自然资源部海洋生态环境科学与技术重点实验室山东青岛266061 崂山实验室海洋生态与环境科学功能实验室山东青岛266037

浒苔绿潮是我国南黄海海域最严重的生态灾害。浒苔微观繁殖体的时空分布、种群动态,是黄海浒苔绿潮业务化监测工作的重要内容,但传统的培养法实验周期长、检测效率低,无法满足快速监测预警的要求。本文利用297 bp的漂浮浒苔特异性DNA片... 详细信息

浒苔绿潮是我国南黄海海域最严重的生态灾害。浒苔微观繁殖体的时空分布、种群动态,是黄海浒苔绿潮业务化监测工作的重要内容,但传统的培养法实验周期长、检测效率低,无法满足快速监测预警的要求。本文利用297 bp的漂浮浒苔特异性DNA片段,研发了浒苔微观繁殖体的荧光定量PCR(qPCR)检测技术,并以人工释放的浒苔配子为研究对象,研究了浒苔配子细胞中目标基因片段的拷贝数(240 copies/cell)。利用qPCR法对2023年4月苏北浅滩海域水样进行检测,并与传统培养法进行比较。结果显示,黄海大规模浒苔绿潮暴发前期,苏北浅滩水体中浒苔微观繁殖体丰度为2.1×10^(7) copies/L(约87602 cells/L,qPCR)和6.5株/L(传统培养法),且呈现近岸(靠近筏架区)高、离岸低的趋势。两种方法对浒苔微观繁殖体的检出效率和揭示的分布规律基本一致。qPCR法灵敏、高效,可用于黄海浒苔绿潮业务化监测工作。

关键词：微观繁殖体荧光定量PCR 绿潮浒苔黄海