110 resultados para CDS


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本文阐述了利用紫外可见分光光度法检测CdS薄膜光学性质的基本原理,设计了测试系统,并利用所设计的系统对化学水浴法沉积CdS薄膜的光谱透过率进行测试。通过对不同沉积时间的CdS薄膜的光学性能分析,得出其在一定温度条件下沉积时间对薄膜的光学性质有较大的影响。

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光敏CdS粉的制备与性能研究王岚*鲍崇林王给祥(中国科学院长春应用化学研究所,长春130022)关键词半导体,掺杂CdS,烧结,静电复印硫化镉(CdS)是重要的半导体材料,尤其在可见光范围,已经应用到光电导、压电晶体和激光材料上[1].随着近代微电子…

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研究了光、热和湿气对CdS/Cu2S电池效率及电池成结、结电容、二极管特性和光谱响应特性的影响。结果表明,对未成结电池光加速成结作用;对成结电池光引起电池性能下降。这种衰降是不可逆过程。

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Stable bilayer thin films of indium tin oxide (ITO) on CdS and CdS on ITO were formed for the window material of solar cells by chemical bath and sputtering methods. Scanning electron microscopy and X-ray diffraction studies have shown that both the ITO and CdS films are continuous, homogeneous, with high compactness. Measurement of the CdS film thickness across the 2 x 4 cm(2) reveals the good uniformity of these films. Four-point probe measurements show that the resistivity of a CdS film on an ITO surface is much better than that of the single CdS film The thermal stability of an ITO/CdS bilayer, interfacial reaction and optical transmittance were investigated at different annealing temperatures and environments (air, vacuum and N-2 + H-2). The results showed that the ITO/CdS bilayer film is a good window material for the CuInSe2 and CdTe cells. It is a simple method using a small amount of the cadmium compound.

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介绍了用化学水浴法沉积CdS的方法。SEM、XRD以及透射光谱等分析表明,沉积在玻璃片上的CdS膜,均匀、透明、密实,适合制作太阳电池窗口材料。同时简述了CdS膜生长、生成的化学过程和机理。

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本文着重从仪器本身参数方面和样品方面讨论了由于各参数的不同,对电子结合能的影响。通过半导体CdS膜的研究,探讨了Cd 3d5/2,Cd 3d3/2特征峰结合能的变化规律,分析了这种变化在测试中带来的影响。

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对薄膜CdS/Cu_2S光伏器件稳定性的研究表明,温度对电池寿命的影响是不可忽视的因素。J·Meikin指出,在40℃下对CdS/Cu_2S电池加热5000小时,Ⅰ_(sc)仅下降1%;对于包封电池,K.Boer得出,在60℃下加热两年电池性能没有发生衰变的结论。 我们通过对CdS/Cu_2S太阳电池的加热寿命试验,寻求器件寿命与温度间的关系,并用

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介绍了p-n结电容测量方法。通过测量C-V特性研究了Cds太阳电池的热处理及上栅过程,分析并讨论了p-n结的变化与电池不稳定的关系。初步研究了扩散电位的测定问题。

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本文综述了CdTe/CdS和CuInSe_2/CdS薄膜太阳电池的进展,讨论了这两种电池的发展前景。

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本文报道了CdS薄膜太阳电池制备条件对其性能的影响,并进行了详细讨论,同时提出了制备CdS薄膜太阳电池的最佳条件。

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本文报道了复合胶粘剂的制备和主要性能,介绍了封装技术,给出了用新合成的复合胶粘剂粘接玻璃封装电池的稳定性结果。

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本文报道了Cu、Fe、Zn对CdS晶体半导体参数和Cu_2S/CdS太阳电池性能的影响。随着Cu、Fe、Zn浓度的增加,电阻率也增加,掺Zn使禁带宽度E_g增大,迁移率μ降低,这些参数的变化,直接使电池的I_(sc)、效率和填充因子(F)降低。在本条件下,以上三种杂质都是受主杂质。掺氧能间接增加施主杂质,对受主杂质起补偿作用。

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本文叙述了在各种条件下Cu_2S/CdS太阳电池稳定性的研究,详细提出了氧气和水汽的数量同电池稳定性的关系,提出了温度和真空度对稳定性的影响,同时给出了稳定性与结型、结电容和串联电阻(R_s)的关系.对于上述结果进行了讨论,并提出了关于Cu_2S/CdS太阳电池衰降模型的新观点,最后用这个观点解释了某些衰降现象.

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过去认为在自然界中的Cd只能有限替代ZnS中的Zn。但是,近几年笔者在研究贵州牛角塘镉锌矿床时,经电子探针、扫描电镜和透射电镜等多种方法的研究,发现锌硫化物中的Cd主要以类质同象存在,其含量可从0.8%增至37.93%;镉硫化物中的Zn同样主要以类质同象存在,其含量为2.43%~38.64%。锌硫化物与镉硫化物成渐变的过渡关系,并且Zn与Cd成很好的负相关关系,相关系数达0.99以上,形成ZnS-CdS的完全类质同象系列。这一发现无论在矿物学,还是在地球化学和矿床学上都具有重要的理论意义和实用价值。

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Many diseases are believed to be related to abnormal protein folding. In the first step of such pathogenic structural changes, misfolding occurs in regions important for the stability of the native structure. This destabilizes the normal protein conformation, while exposing the previously hidden aggregation-prone regions, leading to subsequent errors in the folding pathway. Sites involved in this first stage can be deemed switch regions of the protein, and can represent perfect binding targets for drugs to block the abnormal folding pathway and prevent pathogenic conformational changes. In this study, a prediction algorithm for the switch regions responsible for the start of pathogenic structural changes is introduced. With an accuracy of 94%, this algorithm can successfully find short segments covering sites significant in triggering conformational diseases (CDs) and is the first that can predict switch regions for various CDs. To illustrate its effectiveness in dealing with urgent public health problems, the reason of the increased pathogenicity of H5N1 influenza virus is analyzed; the mechanisms of the pandemic swine-origin 2009 A(H1N1) influenza virus in overcoming species barriers and in infecting large number of potential patients are also suggested. It is shown that the algorithm is a potential tool useful in the study of the pathology of CDs because: (1) it can identify the origin of pathogenic structural conversion with high sensitivity and specificity, and (2) it provides an ideal target for clinical treatment.