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对玻璃衬底上采用PECVD方法在低温条件下制备的太阳电池的各相关层材料的性质在经历一定的温度交变周期以后的变化情况进行了研究.研究结果表明(1)P、N层材料(μc-Si)在经历温度交变试验过程以后,在测量误差范围内其光、暗电导率无明显变化;(2)Ⅰ层材料(M-Si)在经历温度交变试验过程以后,其光、暗电导率先略有增加(小于5个热循环周期时),之后(大于5个热循环周期时)基本保持恒定;(3)阻挡层ZnO薄膜在经历温度交变试验过程以后,其方块电阻不变但透射系数有所增加,反射系数基本不变;(4)电极ITO在经历温度交变试验过程以后,其方块电阻不变但透射系数有所增加. 相似文献
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基于单光子计数测量原理,设计并构建了基于光 诱导延迟发光的微量毒品检测系统。对检测系统的性 能进行了评测,结果显示,光电倍增管(PMT)的固有暗计数为11.5±0.7 photon/s,系统 暗计数为11.7±0.7 photon/s,对外界杂散光的屏蔽性能优异。利用本系统检测得到了健 康人和涉嫌吸食冰毒人员的血 清样本的延迟发光衰减曲线和参数值,结果表明,两种样本的各个参数值差异非常明显 。本检测系统灵敏 度高,所需样品量少,检测过程不与样品直接接触,为生物样本中微量毒品的检测提供了强 有力的工具。 相似文献
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In this paper, we report the discrimination of the viability of human umbilical cord mesenchymal stem cells (hUC-MSCs) with photo-induced delayed luminescence (DL). We measure the DL decay kinetics of hUC-MSCs using an ultraweak luminescence detection system, and find the significant difference in the weight distributions of the decay rate for hUC-MSCs with high and low viabilities. Spectral discrimination of hUC-MSCs with high and low viabilities is thus carried out by comparing the DL kinetics parameters, including the initial intensity, the peak decay rate and the peak weight value. Our results show that the novel optical method for the viability diagnosis of hUC-MSCs has a promising prospect. 相似文献
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For high efficiency Cu(In,Ga)Se2 (CIGS) solar cell, the high-resistivity layer with high optical transmittance has to be adopted between the buffer layer and the high-conductivity window layer. In this paper, we propose Sn doped ZnO (ZTO) film, instead of the traditional intrinsic ZnO (i-ZnO) film, as an alternative n-type high-resistivity window layer for CIGS solar cell. In this experiment, both ZTO and i-ZnO films are strong (002) oriented, and the surface morphologies of the two films are almost the same. The statistical roughnesses of i-ZnO film and ZTO film are 0.58 nm and 0.63 nm, respectively. However, the optical transmittance of ZTO film is higher than that of i-ZnO film with the same thickness. The efficiency of ZTO based CIGS cell was 14.24%, which is almost the same as the efficiency of i-ZnO based CIGS cell. These results fully suggest that it is very feasible to replace i-ZnO with ZTO as the high resistant window layer. 相似文献
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采用磁控溅射方法,在不锈钢箔上制备多横向界 面Mo(M-Mo,multi-transverse interface Mo)和单横向界面Mo(S-Mo)薄 膜,并利用共蒸发三步法分别在M-Mo和S-Mo薄膜上制备Cu(In,Ga)Se2(CIGS)薄膜及 器件。通过二次离子质谱仪(SIMS)、X射线衍射仪(XRD)和扫描电子显微镜(SEM)研究了不同 结构的Mo薄膜对CIGS影响。通过I-V测试,表征M-Mo和S -Mo作为背电极的CIGS电池电学性能。XRD结果显示,M-Mo和S-Mo 薄膜均以(110)为择优取向。SEM结果显示,M-Mo薄膜相对 于S-Mo,薄膜晶粒 较小,粗糙度较大。J-V测试结果显示,M-Mo薄膜作为背 电极的电池的开路电压Voc、短路电流J sc和填充因子(FF)均有所提高。 相似文献
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高斯光束入射折射率失配对共焦显微术的影响 总被引:1,自引:0,他引:1
采用光的矢量衍射理论,研究了场振幅为高斯分布的平面波入射到无球差高数值孔径物镜上,折射率失配对共焦显微术的影响,并进行数值模拟。结果表明,在折射率失配情况下,点扩散函数在xz平面上的分布相对于焦平面不再为对称分布,同时出现焦点漂移、半高宽变宽的现象。 相似文献