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ZHENG Jian-bang REN Ju HOU Chao-qi 《半导体光子学与技术》2005,11(4):248-252,258
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. 相似文献
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应用液-液色谱联用技术在线富集测定环境水中西维因和抗蚜威的残留量 总被引:1,自引:0,他引:1
为高效液相色谱法测定环境水样中残留的西维因和抗蚜威的含量,应用了液-液色谱联用技术,实现了在线富集、分离和检测。分析中用YWG-C18(10mm×4.6mm,10μm)和YWG-C18(150mm×4.6mm,10μm)依次作为富集柱和分离柱,以体积比45比55混合的甲醇与水的混合溶液作为流动相,其流速为1.0mL·min^-1。选定紫外光度检测的波长为228nm,试样溶液在富集柱上的流速为5.0mL·min^-1。此外,对渗漏体积等参素也作了试验,分析信号值与两农药的质量浓度在0.04~1.0μg·L^-1范围内呈线性关系。测得方法的检出限(S/N=3)为0.008μg·L^-1(西维因)和0.014μg·L^-1(抗蚜威),回收试验的结果在93%~119%之间。还对日内和日间精密度进行了试验,测定西维因的日内精密度为1.3%~20.0%,日间精密度为2.39/6~22.2%,测定抗蚜威的日内精密度为2.0%~10.8%,日间精密度为2.2%~5.8%。 相似文献
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采用原位聚合法制备了以ZnO量子点为核、石墨烯量子点(GQDs)为壳的ZnO@ GQDs核壳结构量子点。通过TEM和HR-TEM对量子点进行形貌和结构的分析表征。结果表明,合成的ZnO@ GQDs核壳结构量子点为球形,粒径为~7 nm,且尺寸均匀。PL光谱研究表明,新型量子点的发射峰位于369 nm,发光峰窄、强度高;相对于ZnO的本征发射峰,GQDs的引入使得ZnO@GQDs核壳量子点的荧光发射峰出现蓝移、强度变高,从而使复合量子点的荧光具有较纯的色度和较高的强度,说明GQDs的引入具有协同优化效应。该量子点有望应用于LED显示器件。 相似文献
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ZHENG Jian-bang REN Ju GUO Wen-ge HOU Chao-qi 《半导体光子学与技术》2005,11(4):253-258
Through theoretical analyses of the Shockley equation and the difference between a practical P-N junction and its ideal model, the mathematical models of P-N junction and solar cells had been obtained. With Matlab software, the V-I characteristics of diodes and solar cells were simulated, and a computer simulation model of the solar cells based on P-N junction was also established. Based on the simulation model, the influences of solar cell's internal resistances on open-circuit voltage and short-circuit current under certain illumination were numerically analyzed and solved. The simulation results showed that the equivalent series resistance and shunt resistance could strongly affect the V-I characteristics of solar cell, but their influence styles were different. 相似文献
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气相沉积法制备含酞菁铜聚酰亚胺薄膜的光电性能 总被引:2,自引:0,他引:2
在2×10-3Pa真空度下,以酞菁铜、均苯四甲酸酐和二氨基二苯醚为原料,通过控制三源单体的加入摩尔计量、加热时间和沉积速率,在玻璃衬底上合成了含酞菁铜的聚酰胺酸,再经150℃~200℃真空加热亚胺化1 h后得到了成膜性良好的均匀含酞菁铜聚酰亚胺薄膜.红外谱图证实了所合成产物的结构,紫外-可见光吸收分析表明含酞菁铜聚酰亚胺薄膜在可见光区、近红外区具有较强的吸收,热失重分析表明所制备的含酞菁铜聚酰亚胺具有良好的热稳定性能;用简并四波混频方法测得薄膜的三阶非线性极化率为1.984×10-9esu,表现出良好的三阶非线性特性. 相似文献
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