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Enhancing crystal integrity and structural rigidity of CsPbBr_(3) nanoplatelets to achieve a narrow colorsaturated blue emission

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Light(Science & Applications) 2024年第5期13卷 985-997页

作者： Qianqian Huang Wenxu Yin Bo Gao Qingsen Zeng Dong Yao Hao Zhang Yinghe Zhao Weijia Zheng Jiaqi Zhang xuyong yang Xiaoyu Zhang Andrey L.Rogach Key Laboratory of Automobile Materials MOE School of Materials Science&Engineeringand Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchunChina. State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunChina. State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina. Department of Chemistry University of VictoriaVictoriaBCCanada. Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghaiChina. Department of Materials Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongHong Kong S.A.RChina

Quantum-confined CsPbBr_(3) perovskites are promising blue emitters for ultra-high-definition displays,but their soft lattice caused by highly ionic nature has a limited ***,we endow CsPbBr_(3) nanoplatelets(NPLs)with atomic crystal-like structural rigidity through proper surface engineering,by using strongly bound N-dodecylbenzene sulfonic acid(DBSA).A stable,rigid crystal structure,as well as uniform,orderly-arranged surface of these NPLs is achieved by optimizing intermediate reaction stage,by switching from molecular clusters to mono-octahedra,while interaction with DBSA resulted in formation of a Cs_(x)O monolayer shell capping the NPL *** a result,both structural and optical stability of the CsPbBr3 NPLs is enhanced by strong covalent bonding of DBSA,which inhibits undesired phase transitions and decomposition of the perovskite phase potentially caused by ligand ***,rather small amount of DBSA ligands at the NPL surface results in a short inter-NPL spacing in their closely-packed films,which facilitates efficient charge injection and *** photoluminescence of the produced CsPbBr_(3) NPLs is bright(nearly unity emission quantum yield)and peaks at 457 nm with an extremely narrow bandwidth of 3.7 nm at 80 K,while the bandwidth of the electroluminescence(peaked at 460 nm)also reaches a record-narrow value of 15 nm at room *** value corresponds to the CIE coordinates of(0.141,0.062),which meets Rec.2020 standards for ultra-high-definition displays.

关键词： temperature stability narrow

OXIDIZED HIGH-DENSITY LIPOPROTEIN PROMOTES MATURATION AND MIGRATION OF BONE MARROW DERIVED DENDRITIC CELLS FROM C57BL/6J MICE

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Chinese Medical Sciences Journal 2008年第4期23卷 224-229页

作者： Zeng-xiang xuyong-zong yang Da-ming Feng Shuang Wang Ya-ling Tang Fan He Yan Xia Fang Li Department of Pathology Wannan Medical College Wuhu Anhui 241000 Institute of Cardiovascular Diseases University of South China Hengyang Hunan 421001

Objective To explore the influence of oxidized high-density lipoprotein （oxHDL） on the maturation and migration of bone marrow-derived dendritic cells （BMDCs） from C57BL/6J mice. Methods The C57BL/6J mice bone marrow cell suspension was prepared and purified. Recombinant granulocyte-macrophage colony-stimulating factor （rmGM-CSF） and recombinant interleukin-4 （rmlL-4） were used to promote monocytes to differentiate and suppress lymphocytes. Then 50μg/mL oxHDL was added to stimulate BMDCs, using 50μg/mL high-density lipoprotein （HDL） as homologous protein control, PBS as negative control, and 1 μg/mL lipopolysaccharide （LPS） as positive control. The CD86 and MHCII expression rates were detected with fluorescence-activated cell sorting （FACS）. Liquid scintillation counting （LSC） was used in mixed lymphocyte reactions （MLRs） to reflect the ability of BMDCs in stimulating the proliferation of homologous T cells, Levels of cytokines IL-12 and IL-10 were detected by ELISA. The cell migration was evaluated with the transwell system. Results Compared with PBS group, the expressions of CD86 and MHCII, counts per minute of MLRs, secretion of IL-12 and IL-10, and number of migrated cells in oxHDL group and LPS group significantly increased （all P 〈 0.05）, while the increment was less in oxHDL group than LPS group. The number of migrated cells in oxHDL group was about twice of that in HDL group. Conclusion OxHDL may promote the maturation and migration of BMDCs in vitro.

关键词： dendritic cell oxidized high-density lipoprotein maturation migration atherosclerosis

Efficient and stable hybrid perovskite-organic light-emitting diodes with external quantum efficiency exceeding 40 per cent

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Light(Science & Applications) 2024年第7期13卷 1364-1371页

作者： Lingmei Kong Yun Luo Qianqian Wu Xiangtian Xiao Yuanzhi Wang Guo Chen Jianhua Zhang Kai Wang Wallace CHChoy Yong-Biao Zhao Hongbo Li Takayuki Chiba Junji Kido xuyong yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China. Institute of Nanoscience and Applications Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhen 518055China. Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina. Department of Physics and Lakeside AR/VR Laboratory International Joint Research Center for Optoelectronic and Engineering ResearchYunnan UniversityKunming 650091China. Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China. Graduate School of Organic Materials Science Frontier Center for Organic MaterialsYamagata University4-3-16 JonanYonezawa 992–8510Japan

Light-emitting diodes(LEDs)based on perovskite semiconductor materials with tunable emission wavelength in visible light range as well as narrow linewidth are potential competitors among current light-emitting display technologies,but still suffer from severe instability driven by electric ***,we develop a stable,efficient and highcolor purity hybrid LED with a tandem structure by combining the perovskite LED and the commercial organic LED technologies to accelerate the practical application of *** LED and organic LED with close photoluminescence peak are selected to maximize photon emission without photon reabsorption and to achieve the narrowed emission *** designing an efficient interconnecting layer with p-type interface doping that provides good opto-electric coupling and reduces Joule heating,the resulting green emitting hybrid LED shows a narrow linewidth of around 30 nm,a peak luminance of over 176,000 cd m^(−2),a maximum external quantum efficiency of over 40%,and an operational half-lifetime of over 42,000 h.

关键词： diodes narrow quantum

On the accurate characterization of quantum-dot light-emitting diodes for display applications

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npj Flexible Electronics 2022年第1期6卷 351-362页

作者： Wangxiao Jin Yunzhou Deng Bingbing Guo Yaxiao Lian Baodan Zhao Dawei Di Xiaowei Sun Kai Wang Shuming Chen Yixing yang Weiran Cao Song Chen Wenyu Ji xuyong yang Yuan Gao Shuangpeng Wang Huaibin Shen Jialong Zhao Lei Qian Fushan Li Yizheng Jin Key Laboratory of Excited-State Materials of Zhejiang Province State Key Laboratory of Silicon MaterialsDepartment of ChemistryZhejiang University310027 HangzhouChina State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang University310027 HangzhouChina Department of Electronic and Electrical Engineering Southern University of Science and Technology518055 ShenzhenChina TCL Research ShenzhenGuangdongChina Shenzhen China Star Optoelectronics Semiconductor Display Technology Co. LtdShenzhenGuangdongChina College of Chemistry Chemical Engineering and Materials ScienceSoochow University199 Ren’ai Rd215123 SuzhouJiangsuChina Key Lab of Physics and Technology for Advanced Batteries(Ministry of Education) College of PhysicsJilin University130023 ChangchunChina Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University149 Yanchang RoadShanghai 200072China Najing Technology Corporation Ltd Hangzhou 310052China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacaoSAR 999078China Key Laboratory for Special Functional Materials of Ministry of Education National&Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technologyand Collaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China School of Physical Science and Technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning 530004China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China College of Physics and Information Engineering Fuzhou UniversityFuzhou 350108China

Quantum dot light-emitting diodes(QLEDs)are a class of high-performance solution-processed electroluminescent(EL)devices highly attractive for next-generation display *** the encouraging advances in the mechanism investigation,material chemistry,and device engineering of QLEDs,the lack of standard protocols for the characterization of QLEDs may cause inaccurate measurements of device parameters and invalid comparison of different ***,we report a comprehensive study on the characterizations of QLEDs using various *** show that the emission non-uniformity across the active area,nonLambertian angular distributions of EL intensity,and discrepancies in the adopted spectral luminous efficiency functions could introduce significant errors in the device *** errors in the operational-lifetime measurements may arise from the inaccurate determination of the initial luminance and inconsistent methods for analyzing the luminance-decay ***,we suggest a set of recommended practices and a checklist for device characterizations,aiming to help the researchers in the QLED field to achieve accurate and reliable measurements.

关键词： diodes characterization luminous

高增益CsPbBr3钙钛矿纳米棒的研制及其稳定性研究

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中国激光 2020年第7期47卷 281-288页

作者：时月晴李如雪余佳豪王胜杨绪勇陈锐南方科技大学电子与电气工程系广东深圳518055 上海大学新型显示技术及应用集成教育部重点实验室上海200072

通过在CsPbBr3纳米晶体中加入油胺铟(In(OAm)3)和支化三(二乙胺)膦(TDP)配体,在减缓晶体生长速度的同时促进取向生长,获得了CsPbBr3钙钛矿纳米棒材料。通过透射电子显微镜、X射线衍射系统、紫外-可见分光光度计、光致发光光谱仪对所制备... 详细信息

通过在CsPbBr3纳米晶体中加入油胺铟(In(OAm)3)和支化三(二乙胺)膦(TDP)配体,在减缓晶体生长速度的同时促进取向生长,获得了CsPbBr3钙钛矿纳米棒材料。通过透射电子显微镜、X射线衍射系统、紫外-可见分光光度计、光致发光光谱仪对所制备的CsPbBr3钙钛矿纳米棒晶体特性进行表征,结果表明该纳米棒具有质量好、缺陷密度低、发光性能较好的优点;利用可变条纹长度和变功率PL光谱测得了样品的增益系数(860 cm^-1)和阈值功率(17.5μJ/cm^2);同时测量了样品在极端老化的双八五(温度85℃和相对湿度85%)条件下的发光稳定性,发现稳定性得到了提升。为实现高稳定性钙钛矿激光器提供了实验基础和材料支撑。

关键词：激光光学钙钛矿 CsPbBr3纳米棒光增益放大自发辐射稳定性

Light-emitting field-effect transistors with EQE over 20%enabled by a dielectric-quantum dots-dielectric sandwich structure

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Science Bulletin 2022年第5期67卷 529-536,M0004页

作者： Lingmei Kong Jialong Wu Yunguo Li Fan Cao Feijiu Wang Qianqian Wu Piaoyang Shen Chengxi Zhang Yun Luo Lin Wang Lyudmila Turyanska Xingwei Ding Jianhua Zhang Yongbiao Zhao xuyong yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China CAS Key Laboratory of Crust-Mantle Materials and Environments School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China Faculty of Engineering University of NottinghamNottingham NG72RDUK Center for Optoelectronic Engineering Research Department of PhysicsSchool of Physics and AstronomyYunnan UniversityKunming 650091China

Emerging quantum dots(QDs)based light-emitting field-effect transistors(QLEFETs)could generate light emission with high color purity and provide facile route to tune optoelectronic properties at a low fabrication *** efforts have been devoted to designing device structure and to understanding the underlying physics,yet the overall performance of QLEFETs remains low due to the charge/exciton loss at the interface and the large band offset of a QD layer with respect to the adjacent carrier transport ***,we report highly efficient QLEFETs with an external quantum efficiency(EQE)of over 20%by employing a dielectric-QDs-dielectric(DQD)sandwich *** DQD structure is used to control the carrier behavior by modulating energy band alignment,thus shifting the exciton recombination zone into the emissive ***,enhanced radiative recombination is achieved by preventing the exciton loss due to presence of surface traps and the luminescence quenching induced by interfacial charge *** DQD sandwiched design presents a new concept to improve the electroluminescence performance of QLEFETs,which can be transferred to other material systems and hence can facilitate exploitation of QDs in a new type of optoelectronic devices.

关键词： Light-emitting field-effect transistors Quantum dots Electroluminescence External quantum efficiency

基于In_(1−x)Ga_(x)P梯度合金核无镉量子点的制备及LED应用

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上海大学学报（自然科学版） 2021年第5期27卷 846-855页

作者：叶海桥曹璠窦永江杨绪勇上海大学新型显示技术及应用集成教育部重点实验室上海200444

低毒性磷化铟量子点(indium phosphide quantum dot,InP QD)作为最有可能取代有毒重金属镉基量子点的材料,已经在下一代商业显示和照明领域中显示出巨大潜力.然而,合成具有高荧光量子产率(photoluminescence quantum yield,PL QY)的InP... 详细信息

低毒性磷化铟量子点(indium phosphide quantum dot,InP QD)作为最有可能取代有毒重金属镉基量子点的材料,已经在下一代商业显示和照明领域中显示出巨大潜力.然而,合成具有高荧光量子产率(photoluminescence quantum yield,PL QY)的InP QD仍然具有挑战性.因此,提出了以乙酰丙酮镓作为镓源,在高温下通过乙酰丙酮基对表面配体的活化作用,生成具有梯度合金核的In_(1−x)Ga_(x)P/ZnSe/ZnS量子点,有效解决了原有的InP与ZnSe之间晶格失配的问题;同时减少核壳界面缺陷,使量子点的荧光量子产率高达82%,所制备量子点发光二极管(quantum dot light-emitting diode,QLED)的外量子效率(external quantum efficiency,EQE)达到3.1%.相比传统的InP/ZnSe/ZnS结构量子点,In_(1−x)Ga_(x)P/ZnSe/ZnS量子点荧光量子产率提高了25%,器件的外量子效率提高了近一倍.该方案为解决InP量子点荧光量子产率低、发光器件性能差等问题提供了新的思路.

关键词：磷化铟量子点梯度合金核配体活化量子点发光二极管

人工智能大模型技术在加油站行业的应用前景、挑战与对策

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北京石油管理干部学院学报 2024年第1期31卷 21-26页

作者：王旭东唐傲杨绪勇陈欢北京石油管理干部学院深圳市喂车科技有限公司人工智能研究院中国石油流通协会北京石油管理干部学院工商管理教学部能源经济和市场营销教研室

为促进成品油销售企业和行业决策者深入理解大模型技术的潜力,积极面对和解决技术落地的问题,推动、引领和深化行业的人工智能科技变革进程,分析了人工智能大模型技术如何通过优化客户服务体验和增强企业的竞争力来引领行业变革,以及在... 详细信息

为促进成品油销售企业和行业决策者深入理解大模型技术的潜力,积极面对和解决技术落地的问题,推动、引领和深化行业的人工智能科技变革进程,分析了人工智能大模型技术如何通过优化客户服务体验和增强企业的竞争力来引领行业变革,以及在实际应用过程中可能遭遇的挑战与障碍,并提出针对性的对策建议。

关键词：人工智能大模型数字化加油站经营赋能

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长期留置儿童阴道异物1例并文献复习

中国医药科学 2021年第18期11卷 235-238页

作者：陈海燕颜小华蔡文斌杨旭勇南昌大学第一附属医院高新医院儿科江西南昌330000

目的总结分析儿童阴道异物的临床特征、误诊原因及防范措施。方法回顾性总结南昌大学第一附属医院高新医院儿科2020年12月收治的1例留置2年余儿童阴道异物的临床资料。以“儿童”和“阴道异物”为关键词在万方数据库、中国期刊全文数据... 详细信息

目的总结分析儿童阴道异物的临床特征、误诊原因及防范措施。方法回顾性总结南昌大学第一附属医院高新医院儿科2020年12月收治的1例留置2年余儿童阴道异物的临床资料。以“儿童”和“阴道异物”为关键词在万方数据库、中国期刊全文数据库、中国维普数据库,以“vaginal Foreign body”或“Intravaginal foreign body”和“pediatric”或“children”为关键词在PubMed数据库检索1975年1月至2021年3月相关文献进行文献复习。结果患儿,女,5岁11月,因“反复外阴分泌物2年余,加重伴血性分泌物3月”入院。期间反复就诊于省内各级医疗机构,按“尿路感染、外阴炎”予各类口服或静脉抗生素治疗。入院妇科会诊怀疑阴道异物,全身麻醉下行宫腔镜检查,于阴道内取出一支笔帽,术后症状缓解,随访至2021年3月无不适。结论儿童阴道异物多见于幼少女,主要表现为阴道出血或阴道分泌物;临床上极易被漏诊误诊,若异物长期留置可造成严重并发症;家庭及学校应加强儿童早期性教育、关注儿童心理健康,预防其发生。

关键词：儿童阴道异物误诊预防