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CsPbBr_(x)I_(3-x)thin films with multiple ammonium ligands for low turn-on pure-red perovskite light-emitting diodes

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Nano Research 2021年第1期14卷 191-197页

作者： maowei jiang Zhanhao Hu Luis K.Ono Yabing Qi Energy Materials and Surface Sciences Unit(EMSSU) Okinawa Institute of Science and Technology Graduate University(OIST)1919-1 TanchaOnna-sonOkinawa 904-0495Japan

All-inorganic α-CsPbBr_(x)I_(3-x)perovskites featuring nano-sized crystallites show great potential for pure-red light-emitting diode(LED)***,the CsPbBr_(x)I_(3-x)LEDs based on nano-sized α-CsPbBr_(x)I_(3-x)crystallites have been fabricated mainly via the classical colloidal route including a tedious procedure of nanocrystal synthesis,purification,ligand or anion exchange,film casting,*** the usually adopted conventional LED device structure,only high turn-on voltages(>2.7)have been achieved for CsPbBrxl3-x ***,this mix-halide system may suffer from severe spectra-shift under *** this report,CsPbBr_(x)I_(3-x)thin films featuring nano-sized crystallites are prepared by incorporating multiple ammonium ligands in a one-step spin-coating *** multiple ammonium ligands constrain the growth of CsPbBr_(x)I_(3-x)*** CsPbBr_(x)I_(3-x)thin films benefit from quantum *** corresponding CsPbBr_(x)I_(3-x)LEDs,adopting a conventional LED structure of indium-doped tin oxide(ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/CsPbBr_(x)I_(3-x)/[6,6]-phenyl C61 butyric acid methyl ester(PCBM)/bathocuproine(BCP)/AI,emit pure-red color at Commission Internationale de I'eclairage(CIE)coordinates of(0.709,0.290),(0.711,0.289),etc.,which represent the highest color-purity for reported pure-red perovskite LEDs and meet the Rec.2020 requirement at CIE(0.708,0.292)very *** CsPbBr_(x)I_(3-x)LED shows a low turn-on voltage of 1.6 V,maximum external quantum efficiency of 8.94%,high luminance of 2,859 cd·m^(-2),and good color stability under bias.

关键词： CsPbBr_(x)I_(3-x)thin film nano-sized crystallites surface termination pure-red color perovskite light-emitting diode low turn-on voltage

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Heterointerface engineering of perovskite defects and energetics for light-emitting diodes

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Nano Research 2023年第4期16卷 5525-5532页

作者： Xiaomeng Zhang Lei Shi Junyang Bai Feijiu Wang maowei jiang Key Laboratory of Special Functional Materials of Ministry of Education of China School of Materials ScienceHenan UniversityKaifeng 475004China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China

Perovskite light-emitting diodes(PeLEDs)rely on optimized device architecture to realize effective electro-optical ***,the stacks of dissimilar semiconducting materials form heterointerfaces,at which the defects and energetics of perovskite film greatly affect the device ***,we focus on the heterointerface engineering of perovskite towards high-quality *** defect engineering at both the bottom-surface(namely buried interface)and top-surface of perovskite film is simultaneously performed by semiconducting passivating molecules,which feature aligned energy levels and superior carrier injection ability regarding to ***,such defect passivation could influence the heterointerface *** perovskite work function is decreased by our suggested passivator treatment because of interface dipole,which results in band bending at the heterojunction and modulates the carrier ***,the electron injection is greatly enhanced,which boosts the up-conversion electroluminescence in current ***,via the heterointerface engineering of defects and energetics synergistically,efficient PeLEDs with 3-fold enhancement of external quantum efficiency and low driving voltages with respect to pristine ones are achieved based on our proposed PeLED architecture.

关键词： heterointerface defect passivation energetics perovskite light-emitting diodes up-conversion electroluminescence

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基于介电损耗的电磁线圈匝间绝缘寿命研究

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自动化与仪表 2024年第7期39卷 22-26,41页

作者：关北业王锴牛宏亮蒋茂苇沈阳工业大学电气工程学院沈阳110870 中国科学院沈阳自动化研究所沈阳110016 中国科学院网络化控制系统重点实验室沈阳110016 中国科学院机器人与智能制造创新研究院沈阳110016

低压电磁线圈作为电气设备的核心部件,其匝间绝缘失效问题尤其突出。为评估低压电磁线圈匝间绝缘寿命,对制作的双绞线试样在210℃、230℃、250℃下分别进行10个老化周期的加速热老化试验,探究热应力对其电气性能的影响规律。结果表明,... 详细信息

低压电磁线圈作为电气设备的核心部件,其匝间绝缘失效问题尤其突出。为评估低压电磁线圈匝间绝缘寿命,对制作的双绞线试样在210℃、230℃、250℃下分别进行10个老化周期的加速热老化试验,探究热应力对其电气性能的影响规律。结果表明,随着老化温度升高、老化时间增加,介电损耗与之呈现出直接正相关变化规律。为此提出一种基于介电损耗的失效率模型判断匝间绝缘寿命,并根据Arrhenius模型拟合温度寿命曲线对所提出失效率模型进行精度验证。结果表明,所提出基于介电损耗的失效率模型误差率为0.744%,对评估匝间绝缘寿命具有较高的准确性。

关键词：加速热老化试验介电损耗失效率模型匝间绝缘寿命

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Enabling monodisperse perovskite phase with buried interface modification toward efficient light-emitting diodes

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Nano Research Energy 2023年第3期2卷 38-47页

作者： maowei jiang Xiaomeng Zhang Feijiu Wang Key Laboratory for Special Functional Materials(Ministry of Education of China) National&Local Joint Engineering Research Centre for High-efficiency Display and Lighting TechnologySchool of Materials ScienceHenan UniversityKaifeng 475004China Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China

The performance of perovskite light-emitting diodes(PeLEDs)has been drastically improved ***,the coexistence of polydisperse perovskite domains has been one worthy subject of *** crystallization of perovskite is affected by the buried interface character with the bottom contact layer;and the trap states also inherently exist at the buried interface of the perovskite film,which induce the nonradiative recombination and impede the PeLED *** this work,we focus on the crystallization modulation of monodisperse perovskite nanodomains toward high-performance *** show that a LiBr pre-modification layer on the bottom substrate induces the formation of monodisperse perovskite *** this system,the carrier transferring process deriving from the polydisperse phases is *** addition,the LiBr pre-modification layer at the buried interface minimizes the trap states and enhances the radiative recombination of ***,our PeLEDs show a champion external quantum efficiency(EQE)of 25.5%for 4 mm2 device,and 22.9%for 100 mm^(2)device.

关键词： perovskite light-emitting diode monodisperse phase defect passivation buried interface large area device

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阿托伐他汀药物性肝损伤的临床特征分析

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中国全科医学 2024年第30期27卷 3772-3775,3783页

作者：江林双陈茂伟广西医科大学第一附属医院全科医学科广西壮族自治区南宁市530022 广西医科大学全科医学院广西壮族自治区南宁市530022

背景药物性肝损伤是常见的药物不良反应之一,阿托伐他汀是临床上广泛应用的他汀类降脂药物之一,易引发肝损伤,目前对其所导致的药物性肝损伤的临床特征研究数据较少。目的探讨阿托伐他汀药物性肝损伤的临床特征,以提高临床医生对阿托伐... 详细信息

背景药物性肝损伤是常见的药物不良反应之一,阿托伐他汀是临床上广泛应用的他汀类降脂药物之一,易引发肝损伤,目前对其所导致的药物性肝损伤的临床特征研究数据较少。目的探讨阿托伐他汀药物性肝损伤的临床特征,以提高临床医生对阿托伐他汀药物性肝损伤的认识。方法选取广西医科大学第一附属医院2012年1月—2022年8月住院且使用阿托伐他汀治疗,出现肝损伤且经Roussel Uclaf因果关系评估法评估为阿托伐他汀药物性肝损伤的患者,分析其临床特征。结果经Roussel Uclaf因果关系评估法评估,共确诊84例阿托伐他汀药物性肝损伤。阿托伐他汀药物性肝损伤患者中男性较多(72.6%),平均年龄为(60.2±11.5)岁,且均合并基础疾病(100.0%);达到中度肝损伤2例(2.4%),经治疗治愈或好转率达到100.0%。根据病程分型,主要表现为急性病程(100.0%);根据受损靶细胞分型以混合型最多(60.7%),其次是胆汁淤积型(26.2%)、肝细胞型(11.9%)。78.6%的患者服用阿托伐他汀发生肝损伤的时间在3个月内,且以第1~2周内居多;81.0%的患者在累积服用阿托伐他汀80个药物限定日剂量时发生肝损伤。结论阿托伐他汀药物性肝损伤多发生于男性、中老年、合并基础疾病的患者,多为轻度肝损伤,预后较好;临床分型以混合型、胆汁淤积型居多;肝损伤发生时间主要在3个月内,且阿托伐他汀药物性肝损伤的发生有一定剂量依赖性。

关键词：阿托伐他汀药物性肝病药物性肝损伤体征和症状

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痔上黏膜环切吻合术联合小切口外剥内扎术治疗环状混合痔168例的疗效观察

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中国基层医药 2018年第16期25卷 2122-2125页

作者：于成伟刘畅崔玉峰孟祥玉江茂伟青州市人民医院肛肠外科山东省青州262500

目的探讨痔上黏膜环切吻合术（PPH）联合小切口外剥内扎术治疗环状混合痔的临床疗效。方法选择青州市人民医院2015年1月至2017年1月收治的环状混合痔患者168例为研究对象，均采用PPH联合小切口外剥内扎术治疗。对168例患者临床资料进行... 详细信息

目的探讨痔上黏膜环切吻合术（PPH）联合小切口外剥内扎术治疗环状混合痔的临床疗效。方法选择青州市人民医院2015年1月至2017年1月收治的环状混合痔患者168例为研究对象，均采用PPH联合小切口外剥内扎术治疗。对168例患者临床资料进行分析。结果平均手术时间25min；平均住院时间6d；168例患者均治愈，术后发生肛缘水肿2例、尿潴留7例，无肛门狭窄、大便失禁等并发症发生。结论PPH联合小切口外剥内扎术治疗环状混合痔切口小，创伤轻微，疗效确切，术后并发症少、住院时间短。

关键词：痔吻合术外科治疗结果

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虚实双挂线微创治疗高位肛瘘136例疗效观察

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中华全科医师杂志 2014年第10期13卷 844-845页

作者：于成伟崔玉峰潘景英孟祥玉江茂伟山东省青州市人民医院肛肠外科 262500

对136例高位肛瘘患者应用橡皮筋对肛瘘高位部分实挂（扎紧橡皮筋）,对低位部分虚挂（结扎橡皮筋但不扎紧）治疗,一次治疗的治愈者133例,假性愈合2例,复发1例,治愈率97.8％（133/136）.虚实双挂线微创手术治疗高位肛瘘创伤轻微、痛苦小... 详细信息

对136例高位肛瘘患者应用橡皮筋对肛瘘高位部分实挂（扎紧橡皮筋）,对低位部分虚挂（结扎橡皮筋但不扎紧）治疗,一次治疗的治愈者133例,假性愈合2例,复发1例,治愈率97.8％（133/136）.虚实双挂线微创手术治疗高位肛瘘创伤轻微、痛苦小、愈合快、疗程短,保证了肛门功能正常和肛门皮肤完整性,临床疗效满意.

关键词：虚实双挂线外科手术,微创性直肠瘘

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Improved performance and air stability of perovskite solar cells based on low-cost organic hole-transporting material X60 by incorporating its dicationic salt

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Science China Chemistry 2018年第2期61卷 172-179页

作者： Jishuang Qu Xiaoqing jiang Ze Yu Jianbo Lai Yawei Zhao maowei Hu Xichuan Yang Licheng Sun State Key Laboratory of Fine Chemicals Institute of Artificial Photosynthesis DUT-KTH Joint Education and Research Center on Molecular Devices Dalian University of Technology (DUT) Dalian 116024 China Department of Chemistry School of Chemical Science and Engineering KTH Royal Institute of Technology 100 44 Stockholm Sweden

The development of an efficient, stable, and low-cost hole-transporting material (HTM) is of great significance for perovskite solar cells (PSCs) from future commercialization point of view. Herein, we specifically synthesize a dicationic salt of X60 termed X60(TFSI)2, and adopt it as an effective and stable "doping" agent to replace the previously used lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) for the low-cost organic HTM X60 in PSCs. The incorporation of this dicationic salt significantly increases the hole conductivity of X60 by two orders of magnitude from 10-6 to 10-4 S cm-1. The dramatic enhancement of the conductivity leads to an impressive power conversion efficiency (PCE) of 19.0% measured at 1 sun illumination (100 mW cm-2, AM 1.5 G), which is comparable to that of the device doped with LiTFSI (19.3%) under an identical condition. More strikingly, by replacing LiTFSI, the PSC devices incorporating X60(TFSI)2 also show an excellent long-term durability under ambient atmosphere for 30 days, mainly due to the hydrophobic nature of the X60(TFSI)2 doped HTM layer,which can effectively prevent the moisture destroying the perovskite layer. The present work paves the way for the development of highly efficient, stable, and low-cost HTM for potential commercialization of PSCs.

关键词： perovskite solar cells hole-transporting materials X60 stability sustainable energy

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Design,Synthesis and Bioactivity Study of Marine Alkaloid Neobacillamide-A Derivatives

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Journal of Ocean University of China 2023年第3期22卷 790-800页

作者： WANG Jiali LI maowei ZHANG Xiao ZHANG Zhijin LIU Yang LIU Lu YIN Ruijuan jiang Tao Key Laboratory of Marine Drugs Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Marine Biomedical Research Institute of Qiangdao Qingdao 266237China Laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

The Janus kinases(JAKs)are a family of intracellular tyrosine kinases that play an essential role in many basic biological processes,such as apoptosis and *** any dysfunction of the proteins in this pathway may lead to a variety of diseases,including cancer and diseases that affect the immune system,such as severe combined immune deficient(SCID).Marine biological resources have become an important source in new drug research and development due to their diversity,complexity and *** this study,Marine alkaloid Neobacillamide A was isolated from the greedy and stubborn sponge symbiotic Bacillus atrophicus C89 in the South China *** 24 novel marine alkaloid Neobacillamide A derivatives were designed and synthesized,which were evaluated for their inhibitory activity against JAK/STAT signaling pathway and their cytotoxicity to A549 *** 13c,13o,14d,14g and 14h showed potent JAK/STAT inhibition capability(concentration of 25μmol L^(-1),all inhibitory potencies were above 60%),especially compound 14g exhibited superior JAK/STAT inhibition effect(89.70%inhibition).In addition,all these compounds with a concentration of 25μmol L^(-1)displayed weak or no cytotoxicity to A549 cells,which means that these Neobacillamide A derivatives with JAK/STAT inhibition capability may have potential anti-inflammatory function.

关键词： marine alkaloid Neobacillamide A synthesis JAK/STAT cytotoxicity

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Observed,Reconstructed,and Simulated Decadal Variability of Summer Precipitation over Eastern China

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Journal of Meteorological Research 2017年第1期31卷 49-60页

作者： Jingyun ZHENG maowei WU Quansheng GE Zhixin HAO Xuezhen ZHANG Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences University of Chinese Academy of Sciences College of Resources and Environment

Based on observations made during recent decades, reconstructed precipitation for the period A.D. 1736-2000, dry-wet index data for A.D. 500-2000, and a 1000-yr control simulation using the Community Earth System Model with fixed pre-industrial external forcing, the decadal variability of summer precipitation over eastem China is stud- ied. Power spectrum analysis shows that the dominant cycles for the decadal variation of summer precipitation are： 22-24 and quasi-70 yr over the North China Plain; 32-36, 44-48, and quasi-70 yr in the jiang-Huai area; and 32-36 and 4448 yr in the jiang-Nan area. Bandpass decomposition from observation, reconstruction, and simulation re- veals that the variability of summer precipitation over the North China Plain, jiang-Huai area, and jiang-Nan area, at scales of 20-35, 35-50, and 50-80 yr, is not consistent across the entire millennium. We also find that the warm （cold） phase of the Pacific Decadal Oscillation generally corresponds to dry （wet） conditions over the North China Plain, but wet （dry） conditions in the jiang-Nan area, from A.D. 1800, when the PDO became strengthened. However, such a correspondence does not exist throughout the entire last millennium. Data-model comparison sug- gests that these decadal oscillations and their temporal evolution over eastem China, including the decadal shifts in the spatial pattem of the precipitation anomaly observed in the late 1970s, early 1990s, and early 2000s, might result from internal variability of the climate system.

关键词： decadal variability dominant cycle summer precipitation eastern China data-model comparison

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