掺铝氧化锌透明导电薄膜生长及光电性质研究

采用磁控溅射在载玻片上制备掺铝氧化锌AZO透明导电薄膜,并用扫描电子显微镜观察薄膜的表面形貌,四探针电阻率测试仪测量样品的方块电阻和电阻率,分光光度计测量薄膜透射率.结果表明当功率、温度、氢气掺杂比为200 W、300℃、8%时,制备的AZO薄膜具有最小的方块电阻和电阻率,且在可见光区域内透射率均超过80%.     

SnO2：F透明导电薄膜及其物理特性

本文中报道优质SnO_2:F透明导电薄膜的制备方法,通过对薄膜透射率和电导(方块电阻)的测量分析,研究薄膜特性与工艺条件的关系,探讨最佳工艺条件和薄膜形成规律。提出一种SnO_2:F 晶体缺陷结构模型,可以较好解释电导随 F掺杂浓度的变化结果。     

基片温度对镓钛共掺杂氧化锌

以镓钛共掺杂氧化锌(GTZO)陶瓷靶作为溅射源材料,采用射频磁控溅射技术在玻璃基片上制备了GTZO透明导电薄膜,通过X射线衍射仪(XRD)、可见-紫外光分光光度计和四探针仪等测试表征,研究了基片温度对GTZO薄膜晶体结构、电学性质和光学性能的影响.结果表明:所制备的GTZO薄膜均为六角纤锌矿结构,并具有(002)择优取向,其结晶质量、晶粒尺寸、方块电阻、透过率、光学能隙以及品质因数都与基片温度密切相关,当基片温度为350℃时,GTZO薄膜的品质因数最大,具有最佳的光电综合性能.     

热处理对BaPbO3薄膜化学组成及薄膜电阻的影响

以可溶性无机盐为原料,乙二氨四乙酸、柠檬酸、酒石酸为复合螯合剂,水为溶剂,采用溶胶-凝胶法在Al2O3基片上制备了钙钛矿结构的BaPbO3导电薄膜.利用X射线衍射和能量散射X射线能谱表征方法,并结合薄膜方块电阻的测定,探讨了热处理方式和热处理温度对薄膜化学组成及薄膜电阻的影响.研究表明,与常规热处理技术相比,采用快速热处理工艺制备BaPbO3薄膜需要更高的热处理温度,同时,随着热处理温度的升高,薄膜中的Pb/Ba摩尔比下降,导致薄膜方块电阻上升.采用常规热处理方法,在670℃下保温10min可以制备膜厚约2.5μm、薄膜方块电阻为32Ω/□的BaPbO3薄膜.     

磁控溅射ITO透明导电薄膜的研究

采用直流磁控反应溅射法制备锡掺杂氧化铟 （ Ｉ Ｔ Ｏ） 薄膜, 研究了不同的基片温度、氧分压等工艺参数对 Ｉ Ｔ Ｏ 薄膜电学、光学性能的影响, 制备出方块电阻为２０ － ５０ Ω、可见光透射率高于８６ ％ 的 Ｉ Ｔ Ｏ 薄膜     

氧化铟锡薄膜材料制备及其光电特性研究

采用溶胶-凝胶旋转涂膜法,以InCl3·4H2O和SnCl4·5H2O为前驱物在玻璃基片上制备了氧化铟锡(ITO)薄膜材料,研究掺锡浓度、涂膜层数、热处理温度和热处理时间等工艺条件对ITO薄膜光电特性的影响.实验结果表明,ITO薄膜的方块电阻和可见光透射率都与掺锡浓度、涂膜层数、热处理温度和时间等因素有关,最佳参数为锡掺杂量12wt%,热处理温度和时间分别为450℃和1h,薄膜层数为6层.最佳ITO薄膜的方块电阻为185Ω/□,可见光平均透射率为91.25%.     

PANI-MATMS杂化透明导电薄膜的表征

以聚苯胺(PANI)和γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(MATMS)为反应物,采用溶胶-凝胶法制备了杂化透明导电薄膜。由红外光谱和X射线光电子能谱的结果可知:PANI和MATMS形成杂化结构。TG-DTA分析表明:PANI-MATMS杂化薄膜的热稳定性比PANI好。研究了不同的PANI质量分数对薄膜透过率和方块电阻的影响。随着PANI质量分数的增加,薄膜的可见光透过率逐渐下降,方块电阻也降低。当PANI质量分数为30%时,所得到的杂化薄膜的综合性能较佳,可见光透过率可达87%,薄膜的方块电阻为4.36 kΩ/□。     

基于玻璃基底的透明导电金膜的光学性质

采用直流溅射法,通过调节溅射时间和溅射电流,在玻璃基底上成功制备出不同厚度的透明导电金膜.通过椭圆偏振仪测量了透明导电金膜的厚度及其对可见光的透过率,利用四探针、扫描电子显微镜分别测量和表征了透明导电金膜的方块电阻和表面形貌.研究结果表明,随着透明导电金膜厚度的增加,方块电阻减小,金膜表面连续性变好,且透明导电金膜厚度为10~13nm时,透明导电金膜的导电性和透过性的兼顾最佳.通过实际中透明导电金膜厚度随溅射条件的变化,结合理论膜厚计算公式可知,直流溅射沉积透明导电金膜为岛状生长模式.使用椭圆偏振仪测量了不同入射角度和入射方向上透明导电金薄膜的椭偏参量,发现在各向同性的玻璃基底上生长的透明导电金膜的光学性质表现为各向异性.     

射频磁控溅射工艺参数对掺钨氧化铟锡透明导电薄膜性能的影响

ITO薄膜是目前应用最为广泛的透明导电薄膜,通过在ITO中掺杂其他金属可以进一步改善ITO薄膜的光学和电学性能。本文采用射频(RF)磁控溅射法制备了掺钨氧化铟锡(ITO∶W)透明导电薄膜,研究了薄膜厚度、表面形貌、晶体结构以及光学和电学性能与各溅射参数之间的关系。当溅射功率大于40 W时,制备的ITO∶W薄膜为方铁锰矿结构的多晶薄膜,此时薄膜表面光滑平整而且具有良好的结晶性。在基板温度320℃、溅射功率80 W、溅射时间15 min、工作气压0.6 Pa条件下得到了光学和电学性能优良的ITO∶W薄膜,其方块电阻为10.5Ω/、电阻率为4.41×10^-4Ω·cm,对应的载流子浓度为2.23×10²⁰ cm^-3、迁移率为27.3 cm²·V^-1·s^-1、可见光(400～700 nm)范围内平均透射率为90.97%。此外,本研究还发现通过调节基板温度影响氧元素的状态可以改变ITO∶W薄膜的电学性能。     

真空蒸镀ITO薄膜退火特性分析

采用真空蒸发镀膜工艺制备了ITO透明导电薄膜,以四探针表面电阻仪测量得薄膜方块电阻为400Ω,用组合式多功能光栅光谱仪测得透光率为80％,利用扫描电镜测得膜厚为103nm．用XRD分析了薄膜的物相,并用原子力显微镜分析了薄膜的表面形貌及粗糙度．对薄膜进行退火处理,结果表明,随着热处理温度的升高,晶化趋于完整,组织结构逐渐均匀致密,晶粒有所长大．随退火时间的增加,透光率增加,但方块电阻先减小后增加．     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with