基于多普勒检测技术的智能驱鸟器

鸟类危害已严重地威胁着电力系统及网络的安全运行,为保证输电线路安全稳定的运行,设计了一种基于多普勒检测技术的智能驱鸟器。该装置由太阳能供电,利用多普勒技术对飞鸟进行检测。白天利用语音信号、机械臂驱鸟,夜晚利用发光二极管和超声信号驱鸟。经试验证明,驱鸟效果良好,可有效减少输电线路的鸟害故障,具备故障显示功能,并且具有成本低,免维护,可靠性高等优点。     

中美手机用锂离子电池安全要求的分析比较

介绍中美两国手机用锂离子电池的安全要求,并按照环境适应性、机械安全、电气安全、其他安全四部分划分原则,分析比较两个国家手机用锂离子电池安全要求的差异,为今后我国制修订锂离子电池安全标准和出口生产企业提供参考。     

纳米结构材料及其技术在太阳能电池中的应用和发展现状

太阳能电池的发展和利用离不开太阳能电池材料和技术的发展,文中对纳米结构材料及其技术在太阳能电池和太阳能光电转化技术中的应用和发展现状做了简要综述。介绍了多元化合物太阳电池纳米材料、染料敏化太阳电池纳米材料和有机聚合物太阳电池结构纳米材料的研究现状和技术创新,并指出其发展趋势。     

Effect of sol–gel MgO spin-coating on the performance of TiO2-based dye-sensitized solar cells

This paper is concerned with the improvement of dye-sensitized solar cell (DSSC) efficiency upon MgO post-treatment of the TiO₂ electrode. A simple sol–gel technique, involving magnesium acetate as precursor, ethanol as solvent and nitric acid as stabilizer, is applied to prepare a solution of suspended MgO nanoparticles. A single drop of MgO sol at 0.1 M precursor concentration was spin-coated at 3000 rpm for 30 s onto the TiO₂ electrode and sintered at 500 K for 1 h. Dye-loading using N3-dye was applied for 6 h. An increase in the average efficiency of the DSSC from 2.5% to 3.9% (over 50% enhancement) was recorded. Measurements of the dark I–V characteristics, the open circuit voltage decays, the SEM images and the dye absorbance spectra, for both uncoated and MgO-coated electrodes were examined. The improvement of the DSSC efficiency was attributed to an upward shift of the TiO₂ flat band energy and a reduction of the rate of back-transport and recombination.     

Semiconducting single-walled carbon nanotubes as interfacial modification layers for organic-Si solar cells

A semiconducting single-walled carbon nanotubes (s-SWCNTs) interlayer between poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and n-Si was used for high performance organic-Si hybrid photovoltaic (PV) devices. The s-SWCNTs films with different thickness were utilized to investigate the PV effect on PEDOT:PSS/Si device performance. The surface potential of Si substrate with s-SWCNTs was dramatically reduced, which increased the compatibility between Si and PEDOT:PSS. In addition, s-SWCNTs with good semiconducting properties, guaranteed the charge transfer between Si and PEDOT:PSS. Therein, the electrical contact was dramatically improved with addition of s-SWCNTs interlayer, which led to increased fill factor. A power conversion efficiency (PCE) of 12.14% was achieved with an optimized thickness of s-SWCNTs layer. The s-SWCNTs interface layer was fabricated by a simple solution processed method, which was easily coupled with organic-Si solar cells to enhance the PCE.     

一种低压太阳能LED草坪灯驱动控制集成电路设计

为了减少太阳能LED草坪灯控制系统的成本,降低对太阳能电池的要求,设计了一种能工作在0.8V的低压太阳能LED草坪灯驱动控制器.该电路的输出电流可以在5mA～100mA范围内调节,能够满足各种不同LED对电流的需求.控制充电回路通断的开关管集成在芯片内部,减少了外围器件,使得整个草坪灯系统只需外接一个电感、二极管、电容...     

Optimization of Al_2O_3/SiN_x stacked antireflection structures for N-type surface-passivated crystalline silicon solar cells

In the case of N-type solar cells,the anti-reflection property,as one of the important factors to further improve the energy-conversion efficiency,has been optimized using a stacked Al₂O₃/SiN_x layer.The effect of SiN_x layer thickness on the surface reflection property was systematically studied in terms of both experimental and theoretical measurement.In the stacked Al₂O₃/SiN_x layers,results demonstrated that the surface reflection property can be effectively optimized by adding a SiN_x layer,leading to the improvement in the final photovoltaic characteristic of the N-type solar cells.     

阀控式铅酸蓄电池的维护与监测

文中就蓄电池人工检测与在线监测的技术加以比较,详细论述了各种检测方法的优缺点,提出蓄电池维护中以内阻在线监测为主的解决方案。     

Characteristics of Polyaniline/Si Heterojunction Solar Cell By Electrochemical Dye Sensitization

Using the electrochemical polymerization dye sensitization （ECDS） method, polyaniline （PAn）, which is used as top region material in solar cells, is sensitized with direct blue dye（DS）, and sensitized Al grid/DS-PAn/n-Si/Al heterojunction solar cells is prepared by ECDS. Influences of the ECDS on the absorption spectrum and the junction characteristics of the solar cell were discussed, and the output characteristics were measured. The results show that the absorption spectrum of the sensitized PAn films is much wider and stronger in Vis-range; the diode quality factor is about 6.3 and the height of latent barrier potential of p-n junction is 0.89 eV; the short-circuit current and the conversion efficiency of sensitized DS- PAn/Si heterojunction solar cells are greatly improved, which the short-circuit current can increase 6 times, the fill factor is 57% and the efficiency can reach 1.42 % under the illumination of 37.2 W/m^2 , respectively.     

A Critical Review on Functionalization of Air‐Cathodes for Nonaqueous Li–O2 Batteries

This review reports on the most updated technological aspects of Li–air battery cathode materials. It provides the reader with recent developments, alongside critical views. The requirements for air‐cathodes, as well as the classification and characterization of carbon‐based and carbon‐free air cathodes, are listed. The effects of two major substituent groups of materials, namely carbon and advanced materials (metals, metal‐oxides, metal‐carbides, and metal‐nitrides) aimed at replacing carbon, are discussed in terms of their chemical and electrochemical stability. The report covers aspects of surface chemistry and structure influence on the electrolyte and discharge products stability. The review also reports on the efforts to suppress side reactions and deterioration of the polymeric binders (if a composite electrode is being considered). This is recognized as a means to enhance Li–air battery performance. The report concludes with an outlook and perspective, providing the readers with some insight on other factors and their impact on the long road toward a viable air‐cathode suitable for Li–air battery operations.