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Unraveling abnormal buried interface anion defect passivation mechanisms depending on cation-induced steric hindrance for efficient and stable perovskite solar cells

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Journal of Energy Chemistry 2023年第5期80卷 1-9,I0001页

作者： Dongmei He Ru Li Baibai Liu Qian Zhou Hua Yang xuemeng yu Shaokuan Gong Xihan Chen Baomin Xu Shangfeng Yang Jiangzhao Chen Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Bejing 100049Chin SUSTech Energy Institute for Carbon Neutrality Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhen 518055GuangdongChin Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055GuangdongChina CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

Although ionic liquids(ILs)have been widely employed to heal the defects in perovskite solar cells(PSCs),the corresponding defect passivation mechanisms are not thoroughly understood up to ***,we first reveal an abnormal buried interface anion defect passivation mechanism depending on cationinduced steric *** IL molecules containing the same anion([BF4]^(-))and different sizes of imidazolium cations induced by substituent size are used to manipulate buried *** was revealed what passivated interfacial defects is mainly anions instead of *** and experimental results demonstrate that the large-sized cations can weaken the ionic bond strength between anions and cations,and facilitate the interaction between anions and SnO2as well as perovskites,which is conducive to interfacial defect passivation and ameliorating interfacial *** can be concluded that interfacial chemical interaction strength and defect passivation effect are positively correlated with the size of *** discovery breaks conventional thinking that large-sized modification molecules would weaken their chemical interaction with *** with the control device(21.54%),the device based on 1,3-Bis(1-adamantyl)-imidazolium tetrafluoroborate(BAIMBF4)with maximum size cations achieves a significantly enhanced efficiency of 23.61%along with much increased moisture,thermal and light stabilities.

关键词： Perovskite solar cells Buried interface Ionic liquid Anion defect passivation mechanism Cation-induced steric hindrance

Bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize energy losses for efficient and stable perovskite solar cells

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Journal of Energy Chemistry 2023年第1期76卷 277-287,I0008页

作者： Baibai Liu Ru Li Qixin Zhuang xuemeng yu Shaokuan Gong Dongmei He Qian Zhou Hua Yang Xihan Chen Shirong Lu Zong-Xiang Xu Zhigang Zang Jiangzhao Chen Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China SUSTech Energy Institute for Carbon Neutrality Department of Mechanicaland Energy EngineeringSouthern University of Science and TechnologyShenzhen 51855Guangdong China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Chongqing Institute of Green and Inteligent Technology University of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400714China Department of Chemistry Southerm University of Science and TechnologyShenzhen 518055GuangdongChina

The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination *** buried interfacial contact is detrimental to charge extraction and device ***,we report a bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics.4-trifluoromethyl-benzamidine hydrochloride(TBHCl)containing–CF_(3),amidine cation and Cl^(-)is in advance incorporated into SnO_(2)colloid solution to realize bottom-up *** synergistic effect of multiple functional groups and multiple-bond-induced chemical interaction are revealed theoretically and experimentally.F and Cl^(-)can passivate oxygen vacancy and/or undercoordinated Sn^(4+)defects by coordinating with Sn^(4+).The F can suppress cation migration and modulate crystallization via hydrogen bond with FA^(+),and can passivate lead defects by coordinating with Pb^(2+).The–NH_(2)–C=NH^(+)_(2)and Cl^(-)can passivate cation and anion vacancy defects through ionic bonds with perovskites,*** TBHCl modification,the suppression of agglomeration of SnO_(2)nanoparticles,bulk and interfacial defect passivation,and release of tensile strains of perovskite films are demonstrated,which resulted in a PCE enhancement from 21.28%to 23.40%and improved *** post-treatment,the efficiency is further improved to 23.63%.

关键词： Perovskite solar cells Bottom-up holistic carrier management strategy Functional group synergistic effect Defect passivation Stress release

基于修正Burgers模型的泥岩层套管形变影响因素分析

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力学与实践 2023年第1期45卷 130-139页

作者：段永伟于雪盟刘洪霞何慧张宇昊索彧冯福平苏显蘅东北石油大学石油工程学院黑龙江大庆163311 中国石油吉林油田公司油气工程研究院吉林松原130062 大庆油田博士后科研工作站黑龙江大庆163458

地层含水饱和度的变化对于泥岩储层的蠕变特性有较大影响,尤其是注采过程中泥岩段套管产生形变从而导致套管损坏。本文在Burgers模型基础上加入含水饱和度元件,提高了瞬时蠕变阶段模型的精度,同时对实际油田某泥岩区块进行了比对,得出... 详细信息

地层含水饱和度的变化对于泥岩储层的蠕变特性有较大影响,尤其是注采过程中泥岩段套管产生形变从而导致套管损坏。本文在Burgers模型基础上加入含水饱和度元件,提高了瞬时蠕变阶段模型的精度,同时对实际油田某泥岩区块进行了比对,得出随含水饱和度增加,地层蠕变量增大,且瞬时蠕变阶段时间减小的结论,同时在蠕变条件下套管壁厚、水泥环弹性模量、地层含水饱和度均可大幅度影响套管变形,而套管尺寸对套管变形几乎无影响。本研究成果能够更加准确地计算地层不同含水量条件下泥岩蠕变的套管变形,对井筒的破坏进行有效的预防及控制。

关键词：修正的伯格斯模型瞬时蠕变套管形变含水饱和度影响因素

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不同注入介质对泥岩层滑移的影响研究

力学与实践 2023年第2期45卷 362-372页

作者：段永伟何慧于雪盟刘洪霞索彧冯福平呼布钦苏显蘅东北石油大学石油工程学院黑龙江大庆163311 中国石油吉林油田公司油气工程研究院吉林松原130062 大庆油田博士后科研工作站黑龙江大庆163458

在注CO_(2)与注水两种开发方式下,均会出现泥岩层段的套管剪切损坏加剧的现象。为了明确不同注入介质对泥岩层滑移的影响,将室内实验所得储层岩石物理力学参数与现场实际区块的井网资料相结合,建立了泥岩层剪切滑移流固耦合数值模型,通... 详细信息

在注CO_(2)与注水两种开发方式下,均会出现泥岩层段的套管剪切损坏加剧的现象。为了明确不同注入介质对泥岩层滑移的影响,将室内实验所得储层岩石物理力学参数与现场实际区块的井网资料相结合,建立了泥岩层剪切滑移流固耦合数值模型,通过有限元方法进行求解,分析了不同注入介质在一定注入速度条件下生产3年过程中的孔隙压力、油层变形量和泥岩层滑移量的分布与变化情况。根据计算结果可知,由于水和CO_(2)黏度与密度的差异,导致开发初期注CO_(2)井周围孔隙压力高于注水井。随着开发时间的延长,注CO_(2)井孔隙压力降低速率大于注水井,在生产3年后,注CO_(2)油层整体孔隙压力高于注水油层,使注CO_(2)油层整体均匀上抬,但注水油层高低差更大,导致油层变形更加集中。油层变形量的不同引起了泥岩层滑移量的差异,注CO_(2)泥岩层滑移量小于注水泥岩层滑移量。基于不同注入介质对泥岩层滑移量的影响分析,给出了合理的注入方案,为防治油田套损提供了理论支撑。

关键词：套管剪切注水注气地层滑移孔隙压力

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松南盆地情字外前缘砂页交互储层可压性评价

油气井测试 2024年第4期33卷 66-72页

作者：陈凯段永伟于雪盟刘洪霞王翠翠朱旭中国石油吉林油田公司油气工艺研究院吉林松原138000

松南盆地情字外前缘砂页交互储层资源储量丰富,但储层孔渗较低,资源禀赋差,在采取改造措施前需要对其进行有效的可压性评价。通过对该区的岩心进行X射线衍射、三轴应力压缩等实验,以脆性系数、水平地应力差异系数、断裂韧性以及脆性矿... 详细信息

松南盆地情字外前缘砂页交互储层资源储量丰富,但储层孔渗较低,资源禀赋差,在采取改造措施前需要对其进行有效的可压性评价。通过对该区的岩心进行X射线衍射、三轴应力压缩等实验,以脆性系数、水平地应力差异系数、断裂韧性以及脆性矿物含量四种影响因素为基础,采用层次分析法确定各因素所占权重,构建了与储层具有较好匹配程度的可压性指数计算模型,综合波速各向异性分析、应力敏感性评价等实验结果,对储层的可压性进行综合评价。结果显示,情字外前缘砂页交互储层可压性指数计算结果为0.28,可压性中等,但水平层理及天然裂缝较为发育,目标层整体具有较大的改造潜力。应用该方法对H2-1井开展可压性评价,并根据评价结果对压裂方案进行优化,优化后微地震解释有效改造体积491.2×10^(4)m^(3)、平均日产油9 m^(3),应用效果显著,研究成果可为压裂施工技术路线的确定提供理论支撑。

关键词：松南盆地砂页交互储层矿物特征力学特征波速各向异性应力敏感性可压性评价压裂优化

高效液相色谱法同时测定复方甲硝唑乳膏中三组分含量

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天津药学 2003年第4期15卷 7-9页

作者：杨学猛于美丽天津市第三中心医院天津300170

目的 :建立同时测定复方甲硝唑乳膏中三组分含量的反相高效液相色谱法。方法 :采用 Kromasil C1 8(2 5 0mm× 4.6 mm,5 μm) ,甲醇 - 6 0 mmol/ L 醋酸水溶液 (80∶ 2 0 )为流动相 ,检测波长 2 5 0 nm。结果 :复方甲硝唑乳膏中三组分甲... 详细信息

目的 :建立同时测定复方甲硝唑乳膏中三组分含量的反相高效液相色谱法。方法 :采用 Kromasil C1 8(2 5 0mm× 4.6 mm,5 μm) ,甲醇 - 6 0 mmol/ L 醋酸水溶液 (80∶ 2 0 )为流动相 ,检测波长 2 5 0 nm。结果 :复方甲硝唑乳膏中三组分甲硝唑、克霉唑、马来酸氯苯那敏线性范围分别为 0 .10～ 1.0 0 mg/ ml(r=0 .9996 ) ,0 .0 8～ 0 .80 mg/ ml(r=0 .9998) ,0 .0 8～ 0 .80 mg/ ml (r=0 .9996 )。平均回收率分别为 97.1%、98.0 %和 98.3%。 RSD分别为 1.42 %、1.11%和 1.5 2 %(n =9)。结论 :本法可同时测定 3种成分的含量 ,且简便、灵敏、可靠 ,辅料无干扰。

关键词：反相高效液相色谱法甲硝唑克霉唑马来酸氯苯那敏复方甲硝唑乳膏

Generative adversarial networks enhanced location privacy in 5G networks

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Science China(Information Sciences) 2020年第12期63卷 41-52页

作者： Youyang QU Jingwen ZHANG Ruidong LI Xiaoning ZHANG xuemeng ZHAI Shui yu School of Information Technology Deakin University School of Computer Science University of Technology Sydney National Institute of Information and Communications Technology (NICT) School of Information and Communication Engineering University of Electronic Science and Technology of China Center of AI and Big Data Southeast Digital Economic Development Institute

5G networks, as the up-to-date communication platforms, are experiencing fast booming. Meanwhile, increasing volumes of sensitive data, especially location information, are being generated and shared using 5G networks for various purposes ceaselessly. Location and trajectory information in the published data has always been and will keep courting risks and attacks by malicious adversaries. Therefore, there are still privacy leakage threats by simply sharing the original data, especially data with location information, due to the short cover range of 5G signal tower. To better address these issues, we proposed a generative adversarial networks(GAN) enhanced location privacy protection model to cloak the location and even trajectory information. We use posterior sampling to generate a subset of data, which is proved complying with differential privacy requirements from the end device side. After that, a data augmentation algorithm modified from classic GAN is devised to generate a series of privacy-preserving full-sized synthetic data from the central server side. With the synthetic data generated from a real-world dataset, we demonstrate the superiority of the proposed model in terms of location privacy protection, data utility, and prediction accuracy.

关键词： 5G privacy preservation generative adversarial nets differential privacy

基于停泵压降数据的致密油储层改造效果评价方法

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油气井测试 2024年第5期33卷 60-66页

作者：段永伟王翠翠于雪盟刘洪霞陈凯朱旭东北石油大学石油工程学院黑龙江大庆163318 中国石油吉林油田公司油气工艺研究院吉林松原138000

吉林油田致密油储层压后效果差异大,无法快速有效、低成本评价人工裂缝参数,解决压裂效果认识不清的问题。利用G函数以及不稳定试井压降分析的基本理论,拓展其应用范围,提出基于主压停泵压降数据的压后效果定性定量评价方法,以致密油储... 详细信息

吉林油田致密油储层压后效果差异大,无法快速有效、低成本评价人工裂缝参数,解决压裂效果认识不清的问题。利用G函数以及不稳定试井压降分析的基本理论,拓展其应用范围,提出基于主压停泵压降数据的压后效果定性定量评价方法,以致密油储层H197-48井其中两段为例,根据压降数据的G函数曲线形态判断裂缝复杂程度,利用主压停泵压降曲线定量解释技术对储层及裂缝关键参数进行分析。结果表明:第十一段和第十六段形成的裂缝均是复杂裂缝,两段裂缝条数均为4条,裂缝半长分别为134 m、186 m,第十六段储层改造效果优于第十一段,裂缝形态、裂缝条数、裂缝半长等结果与高频压力监测分析结果相符,验证了评价方法的准确性。该压后效果评价方法,所需资料易获得,分析过程简便,成本低,解释结果可靠,可指导下步压裂方案优化。

关键词：致密油储层主压裂施工压后评价停泵压降 G函数分析裂缝形态压降试井

揿针对眼压控制后青光眼视功能改善的多中心随机双盲对照临床研究

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中医眼耳鼻喉杂志 2024年第1期14卷 21-24页

作者：刘红佶代艳余敏曾健王超谭萨张然余雪萌谭凤绵阳市中心医院四川绵阳621000 绵阳中医医院四川绵阳621053 绵阳万江眼科医院四川绵阳621052

目的观察揿针对眼压控制后青光眼患者视功能的影响。方法采用前瞻性、多中心、随机对照临床研究,从各中心选取192例眼压控制后青光眼患者,随机分为揿针组及安慰针组,分别予以揿针、安慰针治疗。比较治疗前、治疗后2月及4月BCVA、眼压... 详细信息

目的观察揿针对眼压控制后青光眼患者视功能的影响。方法采用前瞻性、多中心、随机对照临床研究,从各中心选取192例眼压控制后青光眼患者,随机分为揿针组及安慰针组,分别予以揿针、安慰针治疗。比较治疗前、治疗后2月及4月BCVA、眼压、MD、MS、RNFL。结果治疗前两组间BCVA、眼压、MD与MS、RNFL无差异(P>0.05)。治疗后2月及4月,安慰针组BCVA较治疗前明显降低(P0.05)。治疗后2月及4月,两组眼压无变化(P>0.05)。治疗后4月,安慰针组MS、MD较治疗前明显下降(P0.05)。治疗后4月,安慰针组RNFL较治疗前下降(P0.05),且揿针组RNFL明显高于安慰针组(P<0.05)。结论揿针可延缓眼压控制后青光眼患者视力下降及视网膜纤维层变薄,以改善眼压控制后青光眼患者视功能。

关键词：青光眼揿针视功能随机对照研究