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Perovskite/silicon-based heterojunction tandem solar cells with 14.8%conversion efficiency via adopting ultrathin Au contact

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Journal of Semiconductors 2017年第1期38卷 60-65页

作者： Lin Fan Fengyou Wang Junhui Liang Xin Yao Jia Fang dekun zhang Changchun Wei Ying Zhao Xiaodan zhang Institute of Photo-Electronic Thin Film Devices and Technology of Nankai University Key Laboratory of Photo-Electronic Thin Film Devices and TechnologyTianjin 300071China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China

A rising candidate for upgrading the performance of an established narrow-bandgap solar technology without adding much cost is to construct the tandem solar cells from a crystalline silicon bottom cell and a high open-circuit voltage top cell.Here,we present a four-terminal tandem solar cell architecture consisting of a selffiltered planar architecture perovskite top cell and a silicon heterojunction bottom cell.A transparent ultrathin gold electrode has been used in perovskite solar cells to achieve a semi-transparent device.The transparent ultrathin gold contact could provide a better electrical conductivity and optical reflectance-scattering to maintain the performance of the top cell compared with the traditional metal oxide contact.The four-terminal tandem solar cell yields an efficiency of 14.8%,with contributions of the top（8.98%）and the bottom cell（5.82%）,respectively.We also point out that in terms of optical losses,the intermediate contact of self-filtered tandem architecture is the uppermost problem,which has been addressed in this communication,and the results show that reducing the parasitic light absorption and improving the long wavelength range transmittance without scarifying the electrical properties of the intermediate hole contact layer are the key issues towards further improving the efficiency of this architecture device.

关键词： lanar perovskite top cell silicon heterojunction bottom cell four-terminal tandem transparent ultra-thin gold electrode

基于数据驱动的中药制药过程质量标志物(Q-Marker)监测方法研究及实践

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中草药 2024年第7期55卷 2452-2462页

作者：张磊林梅陈雪艳苏小琴尚献召李德坤张铁军鞠爱春天津天士力之骄药业有限公司天津300410 天津市中药注射剂安全性评价企业重点实验室天津300410 天津药物研究院天津300462

建立符合中药特点的制药过程质量监测体系是提升中药质量水平的关键措施。中药质量标志物(quality marker,Q-Marker)创新概念的提出,为中药质量表征开辟了新模式。中药产业智能化转型中产生的工业大数据将成为企业的核心资产,对这些数... 详细信息

建立符合中药特点的制药过程质量监测体系是提升中药质量水平的关键措施。中药质量标志物(quality marker,Q-Marker)创新概念的提出,为中药质量表征开辟了新模式。中药产业智能化转型中产生的工业大数据将成为企业的核心资产,对这些数据进行充分挖掘将为质量监测技术开发提供有力支撑。依托前期研究成果,提出基于数据驱动的中药制药过程Q-Marker监测方法,介绍了该方法的技术路线,包括中药Q-Marker监测指标识别,制药工业质量数据挖掘及过程分析技术体系建立3个关键步骤,并阐述了实施各步骤所涉及的关键技术。最后,以注射用益气复脉(冻干)生产过程超滤工序为例,介绍了该方法在中药工业质量监测中的具体应用,为智能化时代下,中药工业构建具有自身特色的质量控制技术提供参考。

关键词：质量标志物智能制造过程监测数据挖掘过程分析技术注射用益气复脉(冻干)

东海近岸大气中的^(210)Po、^(210)Bi和^(210)Pb及其沉降入海通量评估

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海洋学报 2024年第3期46卷 118-128页

作者：马瑞阳钟强强王浩杜娟刘文靖张洁然黄德坤于涛上海海洋大学海洋科学学院上海201306 自然资源部第三海洋研究所福建厦门361005 华东师范大学河口海岸学国家重点实验室上海200062 东莞理工学院生态环境工程技术研发中心广东东莞523808

大气^(210)Po、^(210)Bi和^(210)Pb的沉降通量是海洋中核素示踪颗粒物动力学过程(颗粒有机碳输出、颗粒物输运)的基础参数,为揭示我国近海地区^(210)Po、^(210)Bi和^(210)Pb活度浓度的时空变化规律并估算其沉降入海通量,本文于2016年9... 详细信息

大气^(210)Po、^(210)Bi和^(210)Pb的沉降通量是海洋中核素示踪颗粒物动力学过程(颗粒有机碳输出、颗粒物输运)的基础参数,为揭示我国近海地区^(210)Po、^(210)Bi和^(210)Pb活度浓度的时空变化规律并估算其沉降入海通量,本文于2016年9月至翌年2月和2021年9-11月分别对上海及厦门地区近地表大气气溶胶中^(210)Po、^(210)Pb和^(210)Bi的活度浓度进行了连续观测;基于^(210)Po-^(210)Pb活度比(^(210)Po/^(210)Pb)和^(210)Bi-^(210)Pb活度比(^(210)Bi/^(210)Pb)两种示踪法计算了气溶胶颗粒物的滞留时间,并利用一维简单气溶胶沉降速率模型估算了3种核素以大气沉降方式输入东海的通量。结果显示,2016年上海秋、冬两季^(210)Po、^(210)Bi、^(210)Pb 3种核素活度浓度的变化范围分别为0.11~1.27 m Bq/m^(3)、0.45~1.83 m Bq/m^(3)和1.12~6.10 m Bq/m^(3);2021年秋季厦门^(210)Po、^(210)Bi、^(210)Pb 3种核素活度浓度的变化范围分别为0.05~0.85 m Bq/m^(3)、0.83~2.52 m Bq/m^(3)和0.17~1.32 m Bq/m^(3),上海近地表气溶胶中3种核素的活度浓度秋季平均值比厦门地区高。利用^(210)Po/^(210)Pb和^(210)Bi/^(210)Pb计算得到上海和厦门近地面大气的气溶胶滞留时间存在显著差异,基于^(210)Po/^(210)Pb计算上海气溶胶滞留时间均值为(94±54)d,基于^(210)Bi/^(210)Pb计算上海气溶胶滞留时间均值为(6.4±4.8)d,造成这种差异的原因很可能是两种示踪法本身具有的系统性差异。本文基于一维简易气溶胶沉降速率模型估算了上海地区的^(210)Pb、^(210)Bi和^(210)Po的大气沉降入东海的通量,其在秋季期间的变化范围分别为0.1~26.35 Bq/(m^(2)·d)、0.04~7.91 Bq/(m^(2)·d)和0.01~5.49 Bq/(m^(2)·d)。基于模型估算的^(210)Po、^(210)Bi和^(210)Pb沉降通量与研究区域的实际观测值接近一致,表明利用一维简易气溶胶沉降速率模型间接估算法在替代观测站直测核素的沉降入海通量方面具有一定可行性。

关键词：东海近岸 ^(210)Po ^(210)Bi ^(210)Pb 滞留时间沉降入海通量

变压器油中微生物的生长规律及污染控制措施研究

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绝缘材料 2024年第5期57卷 103-109页

作者：杜国光孙冬张博曲丹李妍曹德昆赵晓冰国网吉林省电力有限公司通化供电公司吉林通化134000 东北电力大学化学工程学院吉林132012

变压器油在贮存、使用和运输过程中易发生微生物污染,影响其品质和绝缘性能。本研究主要考察温度和湿度对变压器油中微生物生长的影响,分析变压器油处理前后的品质变化,识别变压器油的官能团结构和有机物种类,提出有效处理变压器油微生... 详细信息

变压器油在贮存、使用和运输过程中易发生微生物污染,影响其品质和绝缘性能。本研究主要考察温度和湿度对变压器油中微生物生长的影响,分析变压器油处理前后的品质变化,识别变压器油的官能团结构和有机物种类,提出有效处理变压器油微生物污染的方法。结果表明:变压器运行油和故障油中均含有枯草芽孢杆菌、利用糖产酸的杆菌、利用糖产酸产气的杆菌和不利用糖产酸产气的球菌,故障油中的微生物数量远大于运行油,其中枯草芽孢杆菌数量最多;新变压器油中未培养出微生物。高温能够抑制变压器油中微生物的生长,当温度为60℃时,微生物不会完全灭活,一旦温度恢复至37℃,又重新开始生长繁殖。在37℃下,当油水质量比为99∶1、49∶1、19∶1和9∶1时,4种细菌均存在,且随着油水质量比升高,菌株数量增大。采用高压灭菌+分子筛粗滤+超滤的再生处理方法可使污染的变压器油变得清澈透明,且检测不到微生物的存在,再生油中主要含有O-H、C-H、C=O键和不饱和键。经过再生处理后,变压器油的击穿电压和体积电阻率分别由29.67 kV和5.70×10^(10)Ω·m升高至49.50 kV和4.68×10^(11)Ω·m,介质损耗因数由6.052%下降至0.215%,满足DL/T 1419—2015的指标要求。

关键词：变压器油微生物温度再生处理枯草芽孢杆菌

维普期刊数据库博看期刊

致密气试油期间天然气回收工艺在川西北部文兴气区的应用及评价

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钻采工艺 2024年第1期47卷 175-180页

作者：何泉练兴元张晋海王德坤王欢欢徐柱天中国石油西南油气田分公司川西北气矿中国石油川庆钻探工程有限公司井下作业公司四川省江油市621700

川西北部文兴气区沙溪庙组气藏是典型的致密砂岩气藏,酸化和加砂压裂对提高气藏采收率具有良好效果,注入地层的酸化液和压裂支撑剂在试油期间与原料气混合,通常在试油排采阶段返排回地面直接点火燃烧,资源浪费的同时也有环境伤害的风险... 详细信息

川西北部文兴气区沙溪庙组气藏是典型的致密砂岩气藏,酸化和加砂压裂对提高气藏采收率具有良好效果,注入地层的酸化液和压裂支撑剂在试油期间与原料气混合,通常在试油排采阶段返排回地面直接点火燃烧,资源浪费的同时也有环境伤害的风险。针对传统排采方式在经济环保上的弊端,设计并应用“双分离+双除砂+多级节流+超音速脱水脱烃”放喷天然气回收工艺。该工艺在川西北部文兴气区应用效果表明,采用油管特殊丝扣替代传统钢管焊接,设备安装周期可缩短70%;工艺组合针对排采初期复杂地层返排物除砂、分离效果良好,脱水脱烃后气质达标从而实现成功回收;该放喷天然气回收设备设施能耗较低,是绿色低碳清洁效益开发的重要举措。该工艺在现区块应用过程中取得了较好的经济和社会效益,展现出了较好的推广应用价值。

关键词：放喷气回收除砂脱水脱烃绿色低碳效益开发

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他汀类药物致药物性肝损伤的研究进展

药物评价研究 2024年第5期47卷 941-950页

作者：李智魏栋万梅绪张燕欣李智原景李德坤高磊鞠爱春内蒙古医科大学内蒙古呼和浩特010107 天津中医药大学天津301617 天津天士力之骄药业有限公司天津300410 天津市中药注射剂安全性评价企业重点实验室天津300410 内蒙古自治区药物警戒中心内蒙古呼和浩特010010

他汀类药物调脂作用显著,是一类较全面的调脂药,能强效降低血清总胆固醇(TC)和低密度脂蛋白(LDL),在心血管疾病预防和治疗中应用广泛。近年来,随着他汀类药物的广泛应用,对其不良反应的研究也日趋深入。肝毒性是此类药物产生的重要不良... 详细信息

他汀类药物调脂作用显著,是一类较全面的调脂药,能强效降低血清总胆固醇(TC)和低密度脂蛋白(LDL),在心血管疾病预防和治疗中应用广泛。近年来,随着他汀类药物的广泛应用,对其不良反应的研究也日趋深入。肝毒性是此类药物产生的重要不良反应之一,他汀类药物在使用过程中偶有药物性肝损伤(DILI)发生,对他汀类药物致DILI影响因素、相关机制及防治策略的研究进展进行总结,旨在为他汀类药物临床合理使用及DILI的预防提供依据。

关键词：他汀类药物调脂作用不良反应药物性肝损伤合理用药

Tracing surface seawater mixing and nutrient transport by^(222)Rn on the northern coast of Beibu Gulf,China

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海洋学报:英文版 2023年第8期42卷 87-98页

作者： Hao Wang Qiangqiang Zhong Fule zhang Suiyuan Chen Hongyan Bao Jing Lin dekun Huang Tao Yu College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Observation and Research Station of Coastal Wetland Ecosystem in Beibu Gulf Ministry of Natural ResourcesBeihai 536015China State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesXiamen UniversityXiamen 361102China

The transport and diffusion of substances in seawater are limited by the mixing motion of water bodies,while the main forms of mixing in offshore water bodies are advection and eddy diffusion.The eddy diffusion process of water indicates the possible transport direction of dissolved substances.However,the complex environment in the coastal zone makes it difficult to quantitatively assess the water diffusion process.^(222)Rn is a useful tool to trace the diffusion process of water bodies.However,studies on the^(222)Rn distribution and its behavior in the Beibu Gulf are scarce.In this study,the activity distribution characteristics of^(222)Rn in surface seawater of the Guangxi shelf area of the Beibu Gulf were measured.Based on the one-dimensional,steady-state model,the vorticity diffusion coefficient of^(222)Rn in the horizontal direction was calculated as(0.42−2.13)×10^(8) m^(2)/d,and the offshore fluxes of^(222)Rn under the influence of water mixing were calculated as 2.00×10^(12) Bq/d.Correspondingly,the horizontal transport fluxes of silicate,phosphate,nitrite and nitrate were 6.28×10^(−3)mol/(m^(2)·d),0.10×10^(−3)mol/(m^(2)·d),0.20×10^(−3)mol/(m^(2)·d)and 4.15×10^(−3)mol/(m^(2)·d),respectively.These results indicate that the study of eddy current diffusion in offshore marine water facilitates a deeper understanding of the water mixing process and nutrient transport and migration.

关键词： ^(222)Rn water mixing nutrients vorticity diffusion coefficient horizontal transport flux

I/P interface modification for stable and efficient perovskite solar cells

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Journal of Semiconductors 2020年第5期41卷 71-77页

作者： Jie zhang Shixin Hou Renjie Li Bingbing Chen Fuhua Hou Xinghua Cui Jingjing Liu Qi Wang Pengyang Wang dekun zhang Ying Zhao Xiaodan zhang Institute of Photoelectronic Thin Film Devices and Technology of Nankai University Tianjin 300350China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Renewable Energy Conversion and Storage Center of Nankai University Tianjin 300072China

Interface engineering has played an increasingly essential role in the development of perovskite solar cells(PSCs).Herein,we adopted an effective and simple one-step interface passivation method on a FA-based perovskite to fabricate efficient and stable planar PSCs.The surface defects are reduced by the perovskite interface passivation layer incorporated between the hole transport and perovskite absorber layers,and then non-radiative recombination is suppressed while interfacial carrier extraction is enhanced.The passivated planar PSCs demonstrates 20.83%power conversion efficiency(PCE),which is caused by the simultaneous enhancement of the fill factor and open-circuit voltage.In addition,the device also shows great ambient and thermal stability.It retains 94%of its original PCE after 1000 h under ambient air without encapsulation as well as90%of its initial efficiency after 400 h under continuous heating at 65°C with encapsulation.This research provides a strategy for the development of efficient and stable PSCs.

关键词： planar perovskite solar cell interfacial engineering one-step solution stability

Large enhancement of magnetocaloric effect induced by dual regulation effects of hydrostatic pressure in Mn_(0.94)Fe_(0.06)NiGe compound

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Journal of Materials Science & Technology 2022年第19期114卷 73-80页

作者： He Zhou dekun Wang Zhe Li Junzhuang Cong Ziyuan Yu Shuo Zhao Peng Jiang Daoyong Cong Xinqi Zheng Kaiming Qiao Hu zhang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China College of Physics and Electronic Engineering Key Laboratory for Advanced Functional and Low Dimensional Materials of Yunnan Higher Education InstituteQujing Normal UniversityQujing 655011China MultiFields Technologies(Beijing)Co.Ltd. Beijing 100190China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China

MM'X(M,M'=transition metals,X=carbon or boron group elements)compounds could exhibit large magnetocaloric effect due to the magnetostructural transition,and the composition regulation has been widely studied to realize the magnetostructural transition.Moreover,the magnetostructural transition is also sensitive to the pressure.Herein,the effect of hydrostatic pressure on magnetostructural transformation and magnetocaloric effect has been investigated in Mn_(0.94)Fe_(0.06)NiGe compound.Dual regulation effect of lowering structural transition temperature and strengthening ferromagnetic(FM)state of martensite is realized by applying hydrostatic pressure,which would greatly improve the magnetocaloric effect of Mn_(0.94)Fe_(0.06)NiGe compound.Moreover,the first-principles calculations have also been performed to discuss the origin of the regulation effect under hydrostatic pressure,and it indicates that the hydrostatic pressure can stabilize the hexagonal structure and decrease the structural transition temperature.The maximum isothermal entropy change increases by 109%from 4.3 J/(kg K)under 0 GPa to 9.0 J/(kg K)under 0.402 GPa for a magnetic field change of 0-3 T.This work proves that the hydrostatic pressure is an effective method to regulate the magnetostructural transition and enhance magnetocaloric effect in MM'X compounds.

关键词： Magnetocaloric effect Magnetostructural transition Hydrostatic pressure Magnetic properties