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Tuning exciton dynamics by the dielectric confinement effect in quasi-two-dimensional perovskites

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Photonics Research 2024年第3期12卷 563-570页

作者： MINGHUAN CUI CHAOCHAO QIN YUANZHI JIANG SHICHEN ZHANG changjiu sun MINGJIAN YUAN YONGGANG YANG YUFANG LIU Henan Key Laboratory of Infrared Materials&Spectrum Measures and Applications Henan Normal UniversityXinxiang 453007China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China Institute of Physics Henan Academy of SciencesZhengzhou 450046China

The dielectric confinement effect plays an essential role in optoelectronic *** studies on the relationship between the dielectric confinement and the photoelectric properties are ***,three organic spacers with different dielectric constants are employed to tune the exciton dynamics of quasi-two-dimensional(quasi-2D)Ruddlesden–Popper perovskite *** transient absorption spectroscopy reveals that the small dielectric constant ligand enables a weak dynamic disorder and a large modulation depth of the coherent phonons,resulting in a more complete energy transfer and the inhibition of a trap-mediated nonradiative ***,the increase in the bulk-ligand dielectric constant reduces the corresponding exciton binding energy and then suppresses the Auger recombination,which is beneficial for high-luminance lightemitting *** work emphasizes the importance of dielectric confinement for regulating the exciton dynamics of layered perovskites.

关键词： dielectric perovskite quasi

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

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Light(Science & Applications) 2021年第4期10卷 516-541页

作者： Li Zhang changjiu sun Tingwei He Yuanzhi Jiang Junli Wei Yanmin Huang Mingjian Yuan Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai University300071 TianjinPeople's Republic of China

Quasi-two-dimensional(quasi-2D)perovskites have attracted extraordinary attention due to their superior semiconducting properties and have emerged as one of the most promising materials for next-generation lightemitting diodes(LEDs).The outstanding optical properties originate from their structural *** particular,the inherent quantum-well structure endows them with a large exciton binding energy due to the strong dielectricand quantum-confinement effects;the corresponding energy transfer among different n-value species thus results in high photoluminescence quantum yields(PLQYs),particularly at low excitation *** review herein presents an overview of the inherent properties of quasi-2D perovskite materials,the corresponding energy transfer and spectral tunability methodologies for thin films,as well as their application in high-performance *** then summarize the challenges and potential research directions towards developing high-performance and stable quasi-2D *** review thus provides a systematic and timely summary for the community to deepen the understanding of quasi-2D perovskite materials and resulting LED devices.

关键词： diodes performance quantum

Perovskite light-emitting diodes toward commercial full-colour displays:progress and key technical obstacles

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Light(Advanced Manufacturing) 2023年第3期4卷 272-291页

作者： changjiu sun Yuanzhi Jiang Keyu Wei Mingjian Yuan Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai University300071TianjinChina

Metal-halide perovskite light-emitting diodes(PeLEDs)possess wide colour gamut,high luminescence efficiency,and low-cost synthesis,making them a promising photonic source for next-generation display *** the first room-temperature emission PeLED was demonstrated in 2014,their performance has improved rapidly within a few years,leading to considerable attention from academia and *** this review,we discuss the primary technical bottlenecks of PeLEDs for commercial display applications,including large-area PeLED preparation,patterning strategies,and flexible PeLED *** review the technical approaches for achieving these targets and highlight the current challenges while providing an outlook for these perovskite materials and PeLED devices to meet the requirements of the next-generation high-colour-purity full-colour display market.

关键词： Perovskite Light-emitting diodes Full-colour displays Large-area flexible LED

A universal hydrochloric acid-assistant powder-to-powder strategy for quick and mass preparation of lead-free perovskite microcrystals

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Light(Science & Applications) 2023年第4期12卷 613-624页

作者： Huanxin Yang Xiangxiang Chen Yiyue Chu changjiu sun Haolin Lu Mingjian Yuan Yuhai Zhang Guankui Long Libing Zhang Xiyan Li Institute of Photoelectronic Thin Film Devices and Technology Solar Energy Conversion CenterNankai UniversityTianjin 300350China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Nankai UniversityTianjin 300350China Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Nankai UniversityTianjin 300350China Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(IAIR)University of JinanJinan 250022 ShandongChina Tianjin Key Laboratory of Molecular Optoelectronic Department of ChemistryTianjin UniversityTianjin 300354China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin 300071China Schoolof Materials Science and Engineering Nankai UniversityTianjin 300350China

Lead-free halide perovskite materials possess low toxicity,broadband luminescence and robust stability compared with conventional lead-based perovskites,thus holding great promise for eyes-friendly white light ***,the traditionally used preparation methods with a long period and limited product yield have curtailed the commercialization of these *** we introduce a universal hydrochloric acid-assistant powder-to-powder strategy which can accomplish the goals of thermal-,pressure-free,eco-friendliness,short time,low cost and high product yield,*** obtained Cs_(2)Na_(0.9)Ag_(0.1)In_(0.95)Bi_(0.05)Cl_(6)microcrystals exhibit bright self-trapped excitons emission with quantum yield of(98.3±3.8)%,which could retain(90.5±1.3)%and(96.8±0.8)%after continuous heating or ultraviolet-irradiation for 1000 h,*** phosphor converted-LED exhibited near-unity conversion efficiency from ultraviolet chip to self-trapped excitons emission at~200 *** ions doping(such as Cs_(2)Na_(0.9)Ag_(0.1)InCl_(6):Ln^(3+))and other derived lead-free perovskite materials(such as Cs_(2)ZrCl_(6)and Cs_(4)MnBi_(2)Cl_(12))with high luminous performance are all realized by our proposed strategy,which has shown excellent availability towards commercialization.

关键词： perovskite preparation hydrochloric

数控实验设备的采购、验收及其工装器具的配备

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中国现代教育装备 2010年第7期 10-11页

作者：孙长久冯培锋集美大学福建厦门361021

本文介绍了数控实验设备在招标采购、调试验收和工装器具配备等方面的基本原则、方法以及应该注意的事项。其中大部分都是作者所多次经历过的经验总结,具有一定的实用价值,供各个兄弟院校采购数控实验设备时参考。

关键词：数控设备采购验收

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考虑横向转运的震后应急物资协同调度研究

武汉理工大学学报（信息与管理工程版） 2018年第4期40卷 389-395页

作者：孙昌玖裴虹刘丹吕伟武汉理工大学中国应急管理研究中心湖北武汉430070 安全预警与应急联动技术湖北省协同创新中心湖北武汉430070 贵州财经大学信息学院贵州贵阳550025

为提高震后应急物资的配送效率,针对集散中心-物流中心-受灾区域三级应急物资配送体系,在应急物流中心一级引入横向转运进行协同调度。基于B型关联度TOPSIS方法确定应急物流中心的物资紧迫程度,考虑时间、成本和物资满意度等建立基于横... 详细信息

为提高震后应急物资的配送效率,针对集散中心-物流中心-受灾区域三级应急物资配送体系,在应急物流中心一级引入横向转运进行协同调度。基于B型关联度TOPSIS方法确定应急物流中心的物资紧迫程度,考虑时间、成本和物资满意度等建立基于横向转运的应急物资协同调度模型,并采用NSGA-Ⅱ算法进行模型求解。以2013年芦山地震为背景设计实验算例,验证模型和算法的有效性,并通过算例对比有横向转运和无横向转运的效率差别。研究结果表明:地震灾害发生后,通过应急物流中心间的横向转运进行应急物资的协同调度,应急物流中心的物资满意度平均提升18.4%,应急物流总成本平均降低36%,有效实现应急物资的协同优化调度。

关键词：应急物资配送横向转运协同调度 NSGA-Ⅱ 芦山地震

超临界流体快速膨胀法分散氮化硼及防止其再团聚的研究

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青岛科技大学学报（自然科学版） 2019年第4期40卷 73-77页

作者：孙长久王腾飞郭红革赵健青岛科技大学高分子科学与工程学院山东青岛266042 齐鲁工业大学轻工科学与工程学院山东济南250353 四川大学高分子材料工程国家重点实验室四川成都610065

以六方氮化硼(h-BN)为原料,利用超临界状态下二氧化碳快速膨胀(RESS)来分散氮化硼,电子显微镜表征证实,RESS可以有效实现氮化硼的分散,制得氮化硼纳米片。同时,为了解决氮化硼分散后再团聚问题,提出对氮化硼表面进行高分子包覆法防止再... 详细信息

以六方氮化硼(h-BN)为原料,利用超临界状态下二氧化碳快速膨胀(RESS)来分散氮化硼,电子显微镜表征证实,RESS可以有效实现氮化硼的分散,制得氮化硼纳米片。同时,为了解决氮化硼分散后再团聚问题,提出对氮化硼表面进行高分子包覆法防止再团聚,实验证实起到良好的效果。

关键词：氮化硼纳米片超临界流体分散快速膨胀

共价功能化氮化硼纳米片/低密度聚乙烯复合材料的制备及其力学性能

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青岛科技大学学报（自然科学版） 2022年第2期43卷 65-71页

作者：李果李畅孙长久李飞翔郭付海赵健青岛科技大学橡塑材料与工程教育部重点实验室山东省橡塑材料与工程重点实验室山东青岛266042

六方氮化硼纳米片(BNNSs)具有极大的比表面积与优异的物理机械性能,是一种理想的纳米填料。但由于BNNSs极易团聚,难以均匀地分散在高分子基体中,大大限制了其应用。共价功能化是目前解决团聚问题的主要方法,然而由于BNNSs表面化学惰性,... 详细信息

六方氮化硼纳米片(BNNSs)具有极大的比表面积与优异的物理机械性能,是一种理想的纳米填料。但由于BNNSs极易团聚,难以均匀地分散在高分子基体中,大大限制了其应用。共价功能化是目前解决团聚问题的主要方法,然而由于BNNSs表面化学惰性,使得对其进行共价功能化很困难。设计了一种通过非破坏性还原反应实现BNNSs共价功能化的新途径,首先通过萘钠还原体系使得BNNSs表面活化带负电随后与卤代烷烃反应,制备出了接枝率高、结构完整的共价功能化六方氮化硼纳米片(g-BNNSs)。傅里叶变换红外光谱(FT-IR)、热失重分析(TGA)和X射线光电子能谱(XPS)结果证实,烷基链成功地接枝到BNNSs上。TGA、透射电镜(TEM)分别对g-BNNSs的接枝率和结构完整性进行了表征。扫描电镜(SEM)观察到g-BNNSs在低密度聚乙烯(LDPE)中的分散性和相容性极佳。静态力学拉伸测试表明g-BNNSs在质量分数1.0%的低填充量下,LDPE的屈服强度、杨氏模量、断裂强度分别提高了149%,167%和119%。

关键词：共价功能化氮化硼低密度聚乙烯纳米复合材料

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超临界流体快速膨胀制备和分散氮化硼纳米片及其高分子复合材料的构建

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青岛科技大学学报（自然科学版） 2019年第6期40卷 65-70页

作者：王腾飞孙长久孔德玉张得利郭红革赵健青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室山东青岛266042 齐鲁工业大学轻工科学与工程学院山东济南250353 杭州师范大学有机硅化学及材料技术教育部重点实验室浙江杭州3111213 四川大学高分子材料工程国家重点实验室四川成都610065

氮化硼纳米片(BNNSs)是一种拥有优良导热、力学、化学稳定性和热稳定性等的二维纳米材料,具有许多独特的应用价值,其制备技术及性能的研究是近年来材料科学领域研究的热点之一。以六方氮化硼(h-BN)为原料,利用超临界流体快速膨胀法(RESS... 详细信息

氮化硼纳米片(BNNSs)是一种拥有优良导热、力学、化学稳定性和热稳定性等的二维纳米材料,具有许多独特的应用价值,其制备技术及性能的研究是近年来材料科学领域研究的热点之一。以六方氮化硼(h-BN)为原料,利用超临界流体快速膨胀法(RESS)对氮化硼进行剥离,制备出氮化硼纳米片。同时,通过嵌入高分子基体法防止其重新聚集,将氮化硼纳米片分散入高分子基体中,得到了具有优异力学性能的氮化硼/高分子复合材料。

关键词：氮化硼纳米片超临界流体分散高分子基复合材料