Novel cathode buffer layer of Ag-doped bathocuproine for small molecule organic solar cell with inverted structure

2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (C₂₆H₂₀N₂), known as bathocuproine (BCP), is a commonly used cathode buffer layer in conventional structure organic solar cells (OSCs). We demonstrated that BCP layer can also be used as a buffer layer in inverted structure OSCs. Unfortunately, the device exhibited an anomalous kink in the current density–voltage (J–V) characteristics, namely, an S-shaped J–V curve, leading to a low fill factor and low power conversion efficiency (PCE). To improve device performance, Ag-doped BCP layer (Ag:BCP) was used to replace the BCP layer. The results showed that the Ag:BCP layer can eliminate the S-kink in the J–V curve, resulting in a large improvement of fill factor and PCE. The origin of the S-shaped J–V curve was demonstrated to originate from the charge accumulation at the fullerene (C₆₀)/BCP interface. On the contrary, the C₆₀/Ag:BCP interface has favorable electronic properties with beneficial gap states for the transport of free carriers. Together with the good conductivity of Ag:BCP layer and the smooth morphology properties, the device performance was greatly improved by Ag:BCP buffer layer.     

基于省际OTN层面的1588v2时间同步技术应用初探

在某80＆#215;40 Gbit/s OTN实验网基于1588v2时间同步传递性能测试的基础上,针对在超长传输距离的骨干OTN现网上进行时间同步传递的应用进行了初探。     

Reducibility of Catalyzed Cerium–Praseodymium Mixed Oxides

Cerium–praseodymium mixed oxides covering a wide range of cerium/praseodymium ratios were synthesized, loaded with 2 wt% palladium, and characterized by X-ray diffraction and temperature-programmed reduction. Both the degree and average temperature of reduction of the catalyzed mixed oxides were found to increase with increasing praseodymium concentration. Quantitative results indicate that these materials may be useful, in conjunction with hydrocarbon traps, for treating automotive cold-start emissions.     

From Zr-Rich to Ce-Rich: Thermal Stability of OSC Materials on the Whole Range of Composition

Car manufacturers use close coupled three way catalysts to reduce cold start emissions. These close coupled catalysts must show long term durability and thermal stability at temperatures higher than 1000 °C. Thus, during the past 10 years, a significant amount of attention has been paid to the design of CeO₂-ZrO₂ OSC materials with improved surface area, phase and OSC stability. Solid solutions of Ce/Zr mixed oxides are now commonly available on industrial scale. Recent studies have demonstrated that the introduction of rare earth oxides promoters such as La, Pr, Nd, Y, Sm [ENGELHARD WO patent o2 30546; OMG-DMC² EP Patent 1 181 970; DAIHATSU EP Patent 1 174 174; DELPHI US Patent 6 387 338; ENGELHARD WO Patent 02 22242] or aluminium oxide [TOYOTA EP Patent 1 172 139; Kanzawa et al. SAE Technical Paper 2003-01-0811] in the Ce/Zr matrix is a very good way to improve the thermal stability and the redox properties of these materials. Positive interactions between PGM and these 'promoters' are also claimed. Nevertheless, not only the composition but the optimization of the manufacturing processes is a key factor to obtain both high thermal stability (expressed as surface area and XRD phase purity) and OSC. To meet the increasingly stringent emission limits, Rhodia has developed a new generation of CeZr based mixed oxides. These materials show phase stability and thermal stability at temperatures higher than 1100 °C in a wide composition range: from Zr-rich to Ce-rich mixed oxides. These characteristics have been obtained with a new manufacturing process which leads to highly porous materials. The controlled morphology at microscopic and macroscopic scale prevents particle sintering under severe ageing conditions. Such materials are preferred PGM supports for cost effective catalysts with low PGM loading     

CAINONET网络管理技术

文章首先简单介绍了“中国高速信息示范网”(CAINONET)的网络构成情况，以及网络管理的分层结构，然后对CAINONET所采用的光监控信道技术和网络管理协议作了详细说明．     

一种新颖的高精度高稳定性CMOS振荡器电路的设计

通过分析传统CMOS振荡电路由于控制回路存在延迟时间,导致输出波形存在上冲下冲的缺点.设计一种新颖的1MHzCMOS方波振荡电路,该振荡电路的频率完全由电路的延迟时间来产生,通过对控制回路的延迟时间进行控制,就可以实现对该CMOS振荡电路的频率精度稳定性的调整.仿真波形显示表明,输入电压VIN从2.7V到6V有较大范围的变化时,该振荡电路的频率依然保持在0.9MHz到1.05MHz之间,误差范围为±0.5%左右,说明本文设计的CMOS振荡器电路具有较高的稳定性和精度,设计成功.     

光传送网的光监控信道技术

介绍了光传送网的功能分层结构、网络的生存性及安全性能要求,确定了光传送网的管理功能,着重分析了ＯＡＤＭ／ＯＸＣ系统光监控信道技术。     

稀土-锆复合氧化物在汽车尾气净化中的应用进展

稀土-锆复合氧化物在汽车尾气净化中有两种重要应用:氧传感器电解质和三效催化剂(TWC)助剂.本文简述了稀土-锆复合氧化物在这两种应用中的作用机理,介绍了氧传感器中ZrO2的稀土掺杂改性,以及CexZr1-xO2固溶体作为催化助剂的研究现状,并对稀土-锆复合氧化物在汽车尾气净化方面的应用进行了展望.     

基于正交信号修正法的BP网络模型及其应用

介绍一种新的多变量数据预处理方法——正交信号修正(OSC)法,提出一种OSC与NIPALS算法结合的O-PLS算法,将该方法用于确定BP网络的基本结构,即确定BP网络的隐层数、节点数及其初始权值,由此建立了O-PLS-BP网络模型。并将它与标准的BP网络模型、PLS-BP网络模型进行比较。仿真结果表明,该算法的拟合和预测效果较好。     

双阴极修饰层改善Rubrene/C70有机太阳能电池的性能

采用NTCDA/PTCBI双阴极修饰层制备了结构为ITO /MoO₃/Rubrene/C70/NTCDA/PTCBI/Al有机太阳能 电池(OSC),研究了双阴极修饰层对Rubrene/C70 OSC性能的影 响。实验结果表明,引入双阴极修饰层 后,器件的各性能参数有了显著提高。通过对PTCBI厚度优化发现,当PTCBI厚为5nm时器件 的各性 能参数最佳,器件的功率转换效率(PCE)=3.19%,电流密度Jsc=8.99mA·cm－2,开路电 压Voc=0.85V, 填充因子(FF)=41.58%,与未插入PTCBI 层相比器件的各性能分别提高了538%、338.5% 、13.3%和16.5%。