基于有机p型掺杂电荷产生层制备叠层式白光OLED的研究

基于新型有机p型掺杂的电荷产生层,制备了叠层式白光有机发光二极管(OLED).有机p型掺杂层具有很高的导电率,可以在不影响器件电学特性的前提下,通过改变该层的厚度来优化白光OLED的器件性能,调节器件的光色.与传统白光OLED相比,文章研究的叠层式白光OLED制备工艺简单、电荷产生效率高,可应用于平板显示与固态照明.     

高稳定的可扩展覆盖网多播算法

提出了一种高稳定的可扩展覆盖网多播（SOM-HS, scalable overlay multicast with high stability）算法。SOM-HS算法定义了节点稳定度因子以及链路权重,能保证高稳定的节点位于多播树骨干网中。在分层分簇构造过程中,SOM-HS算法限制节点出度,保证节点负载均衡。实验结论表明,与现有其他算法相比,在不同组规模下,使用SOM-HS算法时的最大多播延时都最小。     

A stacked chalcopyrite thin‐film tandem solar cell with 1.2 V open‐circuit voltage

CuGaSe₂ (CGS) thin films were prepared on tin‐doped indium oxide (ITO) coated soda‐lime glass substrates by thermal co‐evaporation to fabricate transparent solar cells. The films consisted of columnar grains with a diameter of approximately 1 μm. Some deterioration of the transparency of the ITO was observed after deposition of the CGS film. The CGS solar cells were electrically connected in series with Cu(In,Ga)Se₂ (CIGS) solar cells and mechanically stacked on the CIGS cells to construct tandem cells. The tandem solar cell with the CGS cell as the top cell showed an efficiency of 7.4% and an open‐circuit voltage of 1.18 V (AM 1.5, total area). Copyright © 2003 John Wiley & Sons, Ltd.     

具有新型电荷产生层的叠层有机发光器件

研究了采用薄层WO3作为叠层有机发光器件电荷产生层时的性能并对其厚度进行了优化,器件的电荷产生层由Li掺杂的电子注入层和高透明的WO3组成.研究表明,薄层WO3具有很高的透明度,并能有效地产生和注入空穴.叠层器件性能与单发光单元器件相比较,其亮度及效率均有大幅提高,叠层器件的最大电流效率达到了4.2 cd/A,在相同的电流密度下,叠层器件的效率约为传统器件的2倍;同时,电荷产生层的性能与WO3薄膜厚度密切相关,WO3薄膜厚度为3 nm时,器件的效率在整个电流范围内都保持稳定.采用薄层WO3作为电荷产生层为制备高效叠层有机发光器件提供了一条有效的途径.     

Current transport studies of amorphous n/p junctions and its application in a‐Si:H/HIT‐type tandem cells

This paper presents an understanding of the fundamental carrier transport mechanism in hydrogenated amorphous silicon (a‐Si:H)‐based n/p junctions. These n/p junctions are, then, used as tunneling and recombination junctions (TRJ) in tandem solar cells, which were constructed by stacking the a‐Si:H‐based solar cell on the heterojunction with intrinsic thin layer (HIT) cell. First, the effect of activation energy (E_a) and Urbach parameter (E_u) of n‐type hydrogenated amorphous silicon (a‐Si:H(n)) on current transport in an a‐Si:H‐based n/p TRJ has been investigated. The photoluminescence spectra and temperature‐dependent current–voltage characteristics in dark condition indicates that the tunneling is the dominant carrier transport mechanism in our a‐Si:H‐based n/p‐type TRJ. The fabrication of a tandem cell structure consists of an a‐Si:H‐based top cell and an HIT‐type bottom cell with the a‐Si:H‐based n/p junction developed as a TRJ in between. The development of a‐Si:H‐based n/p junction as a TRJ leads to an improved a‐Si:H/HIT‐type tandem cell with a better open circuit voltage (V_oc), fill factor (FF), and efficiency. The improvements in the cell performance was attributed to the wider band‐tail states in the a‐Si:H(n) layer that helps to an enhanced tunneling and recombination process in the TRJ. The best photovoltage parameters of the tandem cell were found to be V_oc = 1430 mV, short circuit current density = 10.51 mA/cm², FF = 0.65, and efficiency = 9.75%. Copyright © 2015 John Wiley & Sons, Ltd.     

有机薄膜太阳电池的研究进展

有机薄膜太阳电池作为一种新型光伏电池,近年来得到了迅猛发展。其制备工艺简单、价格低廉、柔性、质轻,为人类解决能源问题提供了一种崭新的途径。文章综述了近年来有机薄膜太阳电池的发展状况,结合有机薄膜太阳电池的发展历史,分析了单异质结、体异质结和叠层三种典型结构器件的工作原理和研究成果,探讨了各种器件结构的优缺点,并对有机薄膜太阳电池的发展趋势作了展望。     

导管架平台应变监测传感器优化布置

针对导管架平台应变传感器无法覆盖所有结构关键位置的现状,提出一种基于结构多尺度模拟的应变传感器优化布置方法.利用管单元和梁单元建立导管架平台宏观有限元模型,并基于静力分析确定结构的关键区域.建立关键区域的三维实体有限元模型,采用多点约束方法进行梁单元与实体单元的耦合,完成结构多尺度建模.对多尺度模型进行力学分析,确定应...     

五强溪水电站缆索起重机的安装与使用

五强溪水电站主体工程混凝土浇筑垂直运输在大坝两岸分高、低层布置４台平移式２０ｔ缆索起重机。其中２台高缆从德国引进，属世界上首次采用全遥控的缆机，同时也是国内塔架最高的缆机；２台低缆属我国目前自行设计制造安装的规格最大、速度最高的缆机。     

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本文对钻井生产的噪声源进行了分析,同时也对正常钻井作业时的主要岗位点的噪声进行了调查。提出了井场钻井设备和职工宿舍的布局意见。     

多向协同布孔法爆破拆除深基坑支撑梁的应用

随着城市建设的快速发展,地下空间的高效利用受到广泛关注,而深基坑钢筋混凝土支撑梁的安全、高效拆除是工程建设的关键环节。为此,提出一种沿支撑梁轴向、垂直向同时预制炮孔的多向协同布孔技术及其装药方法,并将其应用于某深基坑支撑梁爆破拆除项目。应用结果表明,在传统垂直向布孔方式基础上,同时布置轴向弧形炮孔;借助牵引装置在轴向孔内敷设导爆索,采用空气间隔装药结构并进行分区延时爆破,可有效降低爆破危害效应,提高爆破作业安全性与拆除效率,改善爆破拆除效果,研究成果可为类似爆破拆除工程提供借鉴。