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Cu(In,Ga)Se2 absorbers prepared by electrodeposition for low-cost thin-film solar cells

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Rare Metals 2017年第9期36卷 729-736页

作者： jing-Yu Qu Zheng-Fei Guo Kun Pan Wei-Wei Zhang xue-jin wang College of Science China Agricultural UniversityBeijing 100083China

Reducing the manufacturing cost of solar cells is necessary to their industrial production. Electrodepositing is an effective, non-vacuum method which is very suitable for cutting the manufacturing cost of thin films as well as developing its large-scale industrial production. In this study, about 1-μm-thick Cu（In,Ga）Se2（CIGS） precursors were electrodeposited on Mo/glass substrates in aqueous solution utilizing a three-electrode potentiostatic *** was used as complexing agent, and all parameters of electrodeposition were precisely *** that, the electrodeposited precursors were selenized in a Se atmosphere with different heating ramp rates（60 and 600℃·min^（-1））. High-quality CIGS films were obtained, and their characteristics were investigated by X-ray fluorescence, scanning electron microscopy, energydispersive spectroscopy, X-ray diffraction, Raman spectra and near-infrared-visible（NIR-Vis） spectra. The results reveal that there are many differences between the properties of the films under different heating rates. Finally,CIGS solar cells were fabricated using a fast and a slow heating rate. The maximum efficiencies achieved for the films selenized at 60 and 600℃-min^（-1） are 3.15% and 0.71%, respectively.

关键词： Cu(In,Ga)Se2 Thin films Electrodeposition Selenization Heating rates

Mg-based absorbable membrane for guided bone regeneration(GBR): a pilot study

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Rare Metals 2019年第6期38卷 577-587页

作者： Wei Peng Jun-Xiu Chen Xian-Feng Shan Yi-Chuan wang Fan He xue-jin wang Li-Li Tan Ke Yang Department of Stomatology Affiliated Zhongshan Hospital of Dalian UniversityDalian 116001China Medical School of Dalian University Dalian 116622China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

A novel calcium-phosphate(Ca–P)-coated magnesium(Mg) membrane used for guided bone regeneration(GBR) was *** microstructural characterization, electrochemical test, immersion test,fluorescence labeling analysis and histopathological evaluation were carried *** results showed that Ca–P coating could obviously improve the corrosion resistance of the pure Mg *** in vivo results showed that Mg membrane coated with Ca–P would take 8 weeks to be completely ***, Mg membrane was completely absorbed within 1 *** evaluation showed that the Ca–P-coated Mg membranes were significantly better than Ti membranes at the early implantation time(4 weeks), and with the time prolonging,the performance of the coated Mg membrane was not as good as pure Ti membranes(but still better than blank group) at 8 and 12 *** coated biodegradable Mg membrane had a good promising application in *** further studies have to be done to further decrease the degradation rate of pure Mg membrane.

关键词： Bone defect Guided bone regeneration Ca–P-coated magnesium(Mg) membrane Bioabsorbable membrane

Multiple-valley effect on modulation of thermoelectric properties of n-type ZrCuSiAs-structure oxyantimonides LnTSbO(Ln=lanthanides and T=Zn,Mn)

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Journal of Materiomics 2019年第1期5卷 51-55页

作者： Yi Li Jian Liu Yu-Fei Chen Fu-Ning wang Xin-Miao Zhang xue-jin wang Ji-Chao Li Chun-Lei wang School of Physics Shandong UniversityJinan 250100China

Thermoelectric properties of n-type LnTSbO(Ln=lanthanides and T?Zn,Mn)were firstly investigated by the first-principles method and the semi-classical Boltzmann *** results show that a multiplevalley structure appears around the bottom of conduction *** valley with a high band degeneracy consists of the bands with a weak band dispersion,leading to large magnitudes of the Seebeck coefficient but low electrical *** valley with a low band degeneracy is made up of the bands with an intense band dispersion,resulting in a high electrical conductivity but small magnitudes of the Seebeck *** thermoelectric properties are dominated by the energy difference,DE,between the *** DE value of LnZnSbO linearly increases with the ionic radius of *** thermoelectric properties are thus effectively modulated by varying the *** a result,LnZnSbO(Ln?Ce-Nd)with the moderate values of DE shows a better thermoelectric *** multiple-valley effect is an effective way to modulate the thermoelectric properties of n-type LnTSbO.

关键词： Multiple-valley structure Oxyantimonide Thermoelectric First principles

Prediction of high-mobility two-dimensional electron gas at KTaO_3-based heterointerfaces

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Chinese Physics B 2019年第4期28卷 310-316页

作者： Fu-Ning wang Ji-Chao Li Yi Li Xin-Miao Zhang xue-jin wang Yu-Fei Chen Jian Liu Chun-Lei wang Ming-Lei Zhao Liang-Mo Mei School of Physics Shandong University

First-principles calculations are performed to explore the possibility of generating the two-dimensional electron gas(2 DEG) at the interface between LaGaO_3/KTaO_3 and NdGaO_3/KTaO_3(001) heterostructures. Two different models —i.e., the superlattice model and the thin film model — are used to conduct a comprehensive investigation of the origin of charge carriers. For the symmetric superlattice model, the LaGaO_3(or NdGaO_3) film is nonpolar. The 2 DEG with carrier density on the order of 1014 cm^(-2) originates from the Ta dxy electrons contributed by both LaGaO_3(or NdGaO_3) and KTaO_3. For the thin film model, large polar distortions occur in the LaGaO_3 and NdGaO_3 layer, which entirely screens the built-in electric field and prevents electrons from transferring to the interface. Electrons of KTaO_3 are accumulated at the interface, contributing to the formation of the 2 DEG. All the heterostructures exhibit conducting properties regardless of the film thickness. Compared with the Ti dxy electrons in SrTiO_3-based heterostructures, the Ta dxy electrons have small effective mass and they are expected to move with higher mobility along the interface. These findings reveal the promising applications of 2 DEG in novel nanoelectronic devices.

关键词： 2DEG first-principles calculation interface

退火条件对电沉积制备铜铟镓硒薄膜品质的影响（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2018年第5期19卷 399-408页

作者： jing-yu QU Zheng-fei GUO Kun PAN Wei-wei ZHANG xue-jin wang College of Science China Agricultural University

目的:退火条件直接影响着电沉积制备的铜铟镓硒薄膜品质,而薄膜品质决定着最终得到器件的转换效率。本实验在不同退火条件下对薄膜进行处理,得出退火条件对薄膜各项表征指标的影响规律,并根据观察到的规律改善退火工艺,以提高铜铟镓硒... 详细信息

目的:退火条件直接影响着电沉积制备的铜铟镓硒薄膜品质,而薄膜品质决定着最终得到器件的转换效率。本实验在不同退火条件下对薄膜进行处理,得出退火条件对薄膜各项表征指标的影响规律,并根据观察到的规律改善退火工艺,以提高铜铟镓硒薄膜品质。创新点:目前利用水溶液电沉积制备的铜铟镓硒薄膜太阳能电池转换效率不高,而退火是制作此电池的关键步骤之一。本文研究了退火温度和升温速率对薄膜品质的影响,分析其可能原因及退火过程发生的反应,并制备出了理想的高品质薄膜。方法:1.在水溶液中利用电沉积法制备出铜铟镓硒薄膜前驱体。2.对前驱体进行退火处理,并针对不同的样品采用不同的退火温度和升温速率。3.利用X射线衍射(XRD)、拉曼光谱(Raman)、扫描电子显微镜(SEM)、X射线荧光光谱(XRF)对薄膜进行表征,分析不同退火条件对结果的影响规律。结论:1.退火温度的影响:退火温度由450°C升高到580°C时,得到的薄膜结晶性越来越好,晶粒边界越来越不明显,Cu/(In+Ga)的比例逐渐升高,说明高温下(≥450°C)金属铟和镓较易挥发;实验中还发现Cu-Se化合物的总含量随退火温度的升高而降低。2.升温速率的影响:退火速率越高,薄膜结晶性越好;快速升温时薄膜中Cu/(In+Ga)的比例略低于慢速升温时的样品,而Ga/(In+Ga)的比例几乎不变,说明快速升温可以减少In和Ga的挥发。

关键词：铜铟镓硒薄膜电沉积退火条件拉曼光谱

Allylation of Aromatic Aldehyde under Microwave Irradiation

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有机化学 2004年第Z1期24卷 310-页

作者： ZHANG,Yu-Mei JIA,xue-Feng wang,jin-Xian Institute of Chemistry Department of Chemistry Northwest Normal University Lanzhou 730070 Institute of Chemistry Department of Chemistry Northwest Normal University Lanzhou 730070 Institute of Chemistry Department of Chemistry Northwest Normal University Lanzhou 730070

　　Allylation of carbonyl compounds is one of the most interesting processes for the preparation of homoallylic alcohols. Over the past few decades, many reagents have been developed for such reactions[1～3]. In this paper, we first report allylic zinc reagent 1, which can be prepared from zinc dust and allyl bromide conveniently in THF, and reacted with aromatic aldehyde to give homo-allylic alcohols under microwave irradiation.……

关键词： Microwave Irradiation microwave irradiation carbonyl compounds aromatic aldehyde allyl bromide zinc dust

Long-term outcomes of gemcitabine and cisplatin in patients with recurrent or metastatic esophageal squamous cell carcinoma： a phase Ⅱ trial

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Chinese Medical Journal 2011年第23期124卷 4012-4017页

作者： HUANG jing FAN Qing-xia CHEN Li LIU Ai-na CAI Rui-gang HAO xue-zhi wang jin-wan SUN Yan Department of Medical Oncology Cancer Institute ＆ Hospital Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beijing 100021 China

Background Esophageal cancer is the sixth most common cause of cancer-related death worldwide. Prior studies had demonstrated potential synergistic antitumor activity of gemcitabine in combination with cisplatin. Therefore, we studied the efficacy and tolerability of such combination for esophageal cancer. Methods Between October 2003 and October 2006, thirty-eight patients with metastatic or recurrent advanced squamous cell carcinoma of the esophagus were enrolled. The median number of treatment cycles per patient was 4 （range 1-7）. Gemcitabine was given at 1000 mg/m2 over 30 minutes on days 1, 8 and cisplatin 40 mg/m2 was given on days 1,2 in an every 21-day cycle. Results The median follow-up for all 38 patients was 76 months （range 11-88 months）. The overall response rate was 42.1% （95%Cl, 25.5%-56.5%）. Median progression-free survival and median survival for all patients were 4.1 months （95%C/, 3.0-5.7 months） and 10 months （95%C/, 7-12 months）, respectively. Patients with a response had significantly longer median survival compared with the patients without a response （11 months vs. 7.5 months, P=0.0069）. Overall survival at 1 year was 36.8%, at 2 years was 10.5%, and at 5 years was 5.3%. The most common grade 3-4 toxicity for all patients was leucopenia （44.7%）. Conclusions This cisplatin-gemcitabine regimen was manageable and had significant efficacy in patients with esophageal squamous cell carcinoma. Patients with a response had improved survival time. Furthermore, a small number of the Datients with metastatic esoohaaeal cancer were still alive in 5 vears with this reaimen.

关键词： chemotherapy gemcitabine cisplatin esophageal cancer

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基于知识的锤上模锻终锻型槽设计支持系统

上海交通大学学报 2004年第7期38卷 1096-1100页

作者：陈学文王进陈军阮雪榆上海交通大学国家模具CAD工程研究中心上海200030

结合当前人工智能技术和知识工程技术的发展 ,研究了锤上模锻终锻型槽设计过程中知识集成和应用的基本方法 ,包括 :终锻型槽设计中知识获取、知识表示和基于知识的设计方法 .说明了面向对象的知识表示方法 ,知识对象的框架由关系槽、属... 详细信息

结合当前人工智能技术和知识工程技术的发展 ,研究了锤上模锻终锻型槽设计过程中知识集成和应用的基本方法 ,包括 :终锻型槽设计中知识获取、知识表示和基于知识的设计方法 .说明了面向对象的知识表示方法 ,知识对象的框架由关系槽、属性槽、规则槽、方法槽组成 ,并给出了终锻型槽设计中知识对象的关系模型 .基于以上方法开发了基于知识的设计支持系统 ,该系统是一个引导型系统 ,在整个设计过程中提供合适的知识 ,引导设计人员完成整个设计任务。

关键词：锤锻终锻型槽人工智能知识工程计算机辅助设计

联合用药治疗耐碳青霉烯铜绿假单胞菌感染的研究进展

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中国药学杂志 2017年第14期52卷 1208-1211页

作者：杨德青倪文涛江学维王瑾王睿于白雪大理大学药学与化学学院云南大理671000 中国人民解放军总医院药物/器械临床试验中心北京100853 中国人民解放军总医院呼吸科北京100853

耐碳青霉烯类铜绿假单胞菌(carbapenem-resistant Pseudomonas aeruginosa,CRPA)已有在医院院内爆发流行的趋势,治疗失败率和病死率高,有效的单用抗菌药物非常有限,往往建议联合用药治疗CRPA感染。笔者就联合用药治疗CRPA感染的体内外... 详细信息

耐碳青霉烯类铜绿假单胞菌(carbapenem-resistant Pseudomonas aeruginosa,CRPA)已有在医院院内爆发流行的趋势,治疗失败率和病死率高,有效的单用抗菌药物非常有限,往往建议联合用药治疗CRPA感染。笔者就联合用药治疗CRPA感染的体内外效应及临床研究方面进行综述,以全面掌握联合用药治疗CRPA感染的研究进展,为临床合理使用联合方案治疗CRPA感染提供一定的试验基础。

关键词：耐碳青霉烯铜绿假单胞菌联合效应联合用药治疗