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Pulsed Laser Deposition ZnS Buffer Layers for CIGS Solar Cells

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Chinese Journal of Chemical Physics 2009年第1期22卷 97-101页

作者： Pai-feng Luo Guo-shun Jiang chang-fei zhu Laboratory of Advanced Functional Materials and Devices Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China Department of Materials Science and Engineering Hefei University of Technology Hefei 230009 China

Polycrystalline ZnS films were prepared by pulsed laser deposition （PLD） on quartz glass substrates under different growth conditions at different substrate temperatures of 20, 200, 400, and 600 ℃, which is a suitable alternative to chemical bath deposited （CBD） CdS as a buffer layer in Cu（In,Ga）Se2 （CIGS） solar cells. X-ray diffraction studies indicate the films are polycrystalline with zinc-blende structure and they exhibit preferential orientation along the cubic phase β-ZnS （111） direction, which conflicts with the conclusion of wurtzite structure by Murali that the ZnS films deposited by pulse plating technique was polycrystalline with wurtzite structure. The Raman spectra of grown films show Al mode at approximately 350 cm^-1, generally observed in the cubic phase β-ZnS compounds. The planar and the cross-sectional morphology were observed by scanning electron microscopic. The dense, smooth, uniform grains are formed on the quartz glass substrates through PLD technique. The grain size of ZnS deposited by PLD is much smaller than that of CdS by conventional CBD method, which is analyzed as the main reason of detrimental cell performance. The composition of the ZnS films was also measured by X-ray fluorescence. The typical ZnS films obtained in this work are near stoichiometric and only a small amount of S-rich. The energy band gaps at different temperatures were obtained by absorption spectroscopy measurement, which increases from 3.2 eV to 3.7 eV with the increasing of the deposition temperature. ZnS has a wider energy band gap than CdS （2.4 eV）, which can enhance the blue response of the photovoltaic cells. These results show the high-quality of these substitute buffer layer materials are prepared through an all-dry technology, which can be used in the manufacture of CIGS thin film solar cells.

关键词： ZnS thin films Pulsed laser deposition Chemical bath deposition Buffer layer

Preparation of CulnS2 Thin Film Using Sulfides Nanoparticle Precursor Ink

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Chinese Journal of Chemical Physics 2010年第4期23卷 465-468,I0002页

作者：汪雯熊洁朱长飞江国顺中国科学技术大学材料科学与工程系中国科学院能量转化材料重点实验室合肥230026

A low cost spin coating route of fabricating CuInS2 polycrystalline thin films by reactive sintering method was put forward. The ink for spin coating was optimized by pre-reducing the precursor powders in hydrogen, which turned the nanoparticle precursor powders from mixed sulfides into a mixture of CuInS2 and Cu-In metal alloys. The results of scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and Raman spectra showed that this optimization could highly improve the performance of CuInS2 polycrystalline thin films, including higher packing density, less impurity phases, and better quality. The energy gap of optimized CuInS2 thin film was determined to be about 1.45 eV by absorption spectroscopy measurement.

关键词： CuInS2 thin film Nanoparticle Ink Spin coating

Ultrasonic Study on Charge Ordering in Nd0.5Ca0.5Mn1-xAlxO3(x=0,0.03)

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Chinese Journal of Chemical Physics 2006年第6期19卷 535-538页

作者：刘毅孔辉苏金瑞朱长飞中国科学技术大学材料科学与工程系合肥230026

The ultrasonic, magnetic and transport properties of Nd0.5Ca0.5Mn1-xAlxO3 （x=0, 0.03） were studied from 15 to 300 K. The temperature dependencies of resistivity and magnetization show that Nd0.5Ca0.5MnO3 undergoes a charge ordering transition at TCO-257 K. An obvious softening of the longitudinal sound velocity above TCO and a dramatic stiffening below Too accompanied by an attenuation peak were observed. These features imply a strong electron phonom interaction via the Jahn-Teller effect iu the sample, Another broad attenuation peak was observed at around Tp-80 K. This anomaly is attributed to the phase separtion between the antiferromagnetic （AFM） and paramagnetic （PM） phases and gives a direct evidence for spin-phonon coupling in the compound. For the x=0.03 sample, both the minimum of sound velocity and attenuation peaks shift to a lower temperature. The results indicate that the charge ordering and CE-type AFM state in Nd0.5Ca0.5MnO3 are both partially suppressed by replacing Mn with A1.

关键词： Manganite Charge ordering Phase separation Ultrasonic velocity and attenuation

Synthesis of High Quality CulnSe2 Films with Oxygen Precursor by Non-vacuum Process

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Chinese Journal of Chemical Physics 2010年第5期23卷 587-590,622页

作者：蒋帅江国顺刘伟峰朱长飞中国科学技术大学材料科学与工程系中国科学院能量转化材料霞点实验室合肥230026

The CulnSe2 absorber was synthesized by non-vacuum process with a simple and low-cost method, which fabricated absorber layer of thin-film solar cell. The extra amount of Se was added into the ink to help reduction of the oxide and solid Se fountain was used to provide Se atmosphere during the selenization progress. The influence of same factors was investigated, such as the time of reduction in H2, the time of selenization and the Se vapor pressure. The selenizaion, processed at 550 ℃ for 60 min with the Se vapor pressure at 1.90 kPa, resulted in high quality CulnSe2 layer with very good chemical composition.

关键词： Thin film CulnSe2 Non-vacuum Nanoparticle

Preparation and Characterization of Electrodeposited-Annealed CulnSe2 Thin Films for Solar Cells

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Chinese Journal of Chemical Physics 2011年第2期24卷 225-230,I0004页

作者：张中伟郭宏艳李纪朱长飞中国科学技术大学材料科学与工程系中国科学院能量转换材料重点实验室合肥230026

CuInSe2 （CIS） films with good crystalline quality were synthesized by electrodeposition followed by annealing in Se vapor at 530 ℃. The morphology, composition, crystal structure, optical and electrical properties of the CIS films were investigated by scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Raman spectroscopy, UV-VISNIR spectroscopy, and admittance spectroscopy. The results revealed that the annealed CIS films had chalcopyrite structure and consisted of relatively large grains in the range of 500-1000 nm and single grain of films extend usually through the whole film thickness. The band gap of CIS films was 0.98 eV and carrier concentration was in the order of 1016 cm-3 after etching the Cu-Se compounds on the film surface. Solar cells with the structure of AZO/i-ZnO/CdS/CIS/Mo/glass were fabricated. Current density vs. voltage test under standard reported condition showed the solar cells with an area of 0.2 cm2 had a conversion efficiency of 0.96%. The underlying physics was also discussed.

关键词： CuInSe2 film Electrodeposition Annealing Solar cell

La0.60Y0.07Ca0.33MnO3巨磁阻氧化物的弹性性能研究

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低温物理学报 1999年第3期21卷 46-49页

作者：朱长飞,郑仁奎中国科学技术大学内耗与固体缺陷开放实验室

测量了巨磁阻氧化物Ｌａ０．６０Ｙ０．０７Ｃａ０．３３ＭｎＯ３多晶单相样品在５０～３００Ｋ温区内的纵波和横波超声声速，并得到其扬氏模量Ｅ，切变模量Ｇ和绝热压缩系数Ｋｓ的动态温度响应曲线．结果发现在居里温度点Ｔｃ附近弹性... 详细信息

测量了巨磁阻氧化物Ｌａ０．６０Ｙ０．０７Ｃａ０．３３ＭｎＯ３多晶单相样品在５０～３００Ｋ温区内的纵波和横波超声声速，并得到其扬氏模量Ｅ，切变模量Ｇ和绝热压缩系数Ｋｓ的动态温度响应曲线．结果发现在居里温度点Ｔｃ附近弹性模量Ｅ和Ｇ急剧增加，绝热压缩系数Ｋｓ出现峰值．这种伴随磁相变和电导相变而出现的超声异常现象表明体系中存在自旋声子和电声子相互作用

关键词：弹性模量弹性系数铁磁相变 La MnO3 Ca 声子耦合巨磁阻

Synthesis and Characterization of Supported CulnSe2 Nanorod Arrays on Rigid Substrates

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Chinese Journal of Chemical Physics 2011年第1期24卷 115-120,I0004页

作者：张中伟李纪刘纪磊朱长弋中国科学技术大学材料科学与工程系中国科学院能量转换材料重点实验室合肥230026

Copper indium diselenide nanorod arrays were electrodeposited on tungsten/silicon rigid substrates using porous anodic alumina as growth template. The porous anodic alumina templates were prepared by anodizing aluminum films which were sputtered onto the tungsten/silicon substrates. A selective chemical etching was used to penetrate the barrier layer at the bottom of the alumina channels before electrodeposition, which enables direct electrical and chemical contact with the underside substrate electrode. The as-deposited samples were annealed at 450 ℃ in vacuum. Scanning electron microscopy revealed that the nanorods were dense and compact with diameter of about 100 nm, length of approximate 1 um, and the aspect ratio of 10. X-ray diffraction, micro-Raman spectroscopy, and high resolution transmission electron microscopy showed that chalcopyrite polycrystalline structure and high purity CuInSe2 nanorods were obtained. The grain size was large in the rod axial direction. Energy-dispersive X-ray spectroscopy showed the composition was nearly stoichiometric. The energy band gap of this nanorod arrays was analyzed by fundamental absorption spectrum and was evaluated to be 0.96 eV.

关键词： CuInSe2 nanorod Electrodeposition Porous alumina template

Transarterial chemoembolization combined with lenvatinib and sintilimab vs lenvatinib alone in intermediate-advanced hepatocellular carcinoma

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 52-61页

作者： fei-Da Wu Hai-Feng Zhou Wei Yang Di zhu Bi-fei Wu Hai-Bin Shi Sheng Liu Wei-Zhong Zhou Department of Interventional Radiology The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029Jiangsu ProvinceChina

BACKGROUND Hepatocellular carcinoma(HCC)is the most common form of liver cancer that has limited treatment options and a poor *** chemoembolization(TACE)is the first-line treatment for intermediate-stage HCC but can induce tumour hypoxia,thereby promoting *** studies suggested that combining TACE with anti-angiogenic therapies and immunotherapy might im-prove ***,a tyrosine kinase inhibitor,has demonstrated superior outcomes compared to sorafenib,while immune checkpoint inhibitors such as sintilimab show potential when combined with ***,the efficacy and safety of TACE combined with lenvatinib and sintilimab(TACE+SL)compared to TACE with lenvatinib alone(TACE+L)in patients with intermediate-ad-vanced HCC has not yet been *** To evaluate the efficacy and safety of TACE+SL therapy in comparison to TACE+L therapy in patients with intermediate-advanced *** A retrospective analysis was performed on patients with intermediate-advanced HCC who received TACE plus lenvatinib with or without sintilimab between September 2019 and September *** characteristics were compared,and propensity score matching was *** survival(OS),progression-free survival(PFS),and objective response rate(ORR)were evaluated between the two groups,and adverse events were *** The study included 57 patients,with 30 in the TACE+SL group and 27 in the TACE+L *** TACE+SL group demonstrated significantly improved median PFS and OS compared to the TACE+L group(PFS:14.1 months vs 9.6 months,P=0.016;OS:22.4 months vs 14.1 months,P=0.039),along with a higher ORR(70.0%vs 55.6%).After propensity score matching,30 patients were included,with the TACE+SL group again showing longer median PFS and a trend toward improved OS(PFS:14.6 months vs 9.2 months,P=0.012;OS:23.9 months vs 16.3 months,P=0.063),and a higher ORR(73.3%vs 53.3%).No severe adverse events were *** TACE+SL demonstrat

关键词： Hepatocellular carcinoma Transarterial chemoembolization Sintilimab Lenvatinib Immunotherapy Programmed cell death 1 Prognosis

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下石节煤矿大采高工艺开采实践与探索

陕西煤炭 2015年第4期34卷 99-101页

作者：常祝飞陕西陕煤铜川矿业公司生产部陕西铜川727000

介绍了下石节煤矿2301综采工作面,采用大采高一次采全高工艺开采,改革了原有的综采放顶煤工艺,取得了良好的经济及安全效益,对相近地质条件的工艺改革具有先导性的现实意义。

关键词：大采高开采工艺探索