论文部分内容阅读
通过低温制备(120℃)构建出不同比例石墨/聚苯胺复合对电极,分析了复合对电极组装的染料敏化太阳电池(DSCs)的光电性能,并通过X射线衍射仪、傅里叶红外光谱仪、电化学交流阻抗法和循环伏安法等表征方法探讨了光电性能变化的内在原因,同时探讨了复合对电极中引入镍纳米颗粒对DSCs光电性能的影响。结果表明:在对电极中,聚苯胺质量含量25%的复合对电极对I_3~-/I~-氧化还原反应具有更佳的催化活性,其DSCs短路电流密度、开路电压分别达到7.41mA·cm~(-2),和0.595V,其DSCs光电转换效率最大为2.193%,与纯石墨对电极和纯聚苯胺对电极时相比,光电转换效率分别提高了86.6%和45.3%。添加镍纳米颗粒后,导致复合对电极串联电阻的增加以及催化活性的弱化,最终促使相应器件的四个光电性能参数均有不同程度的下降。
The different ratios of graphite / polyaniline composite counter electrode were constructed by low temperature (120 ℃). The photoelectric properties of the dye-sensitized solar cells (DSCs) assembled with the composite counter-electrode were analyzed and characterized by X-ray diffractometry, Fourier transform infrared spectroscopy , Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were used to investigate the intrinsic causes of photoelectric properties. The effects of nickel nanoparticles on the photoelectric properties of DSCs were also discussed. The results showed that the composite electrode with polyaniline mass content 25% had better catalytic activity for I_3 ~ - / I ~ - redox reaction, the short circuit current density and open circuit voltage of DSCs reached 7.41mA · cm ~ (-2), and 0.595V, the maximum photoelectric conversion efficiency of DSCs was 2.193%. Compared with pure graphite counter electrode and pure polyaniline electrode, the photoelectric conversion efficiency increased by 86.6% and 45.3% respectively. Adding nickel nanoparticles resulted in the increase of the series resistance of the composite electrode and the weakening of the catalytic activity, which finally led to the decrease of the four optoelectronic performance parameters of the corresponding devices.