ZnO团聚体/纳米片复合光阳极膜染料敏化太阳能电池

ZnO Nanocrystalline Aggregates/Nanosheets Composite Based Dye-Sensitized Solar Cells

采用水热法,以ZnO团聚体膜为生长衬底,放置于Zn(NO_3)_2·6H_2O浓度为0.07 mol/L的Zn(NO_3)_2·6H_2O/尿素生长液中,在90oC下反应7 h,制备ZnO团聚体/纳米片复合膜。采用X射线衍射仪、透射电子显微镜和扫描电子显微镜对粉和ZnO薄膜的物相组成和形貌进行表征,采用太阳光模拟器和数字源表测试了电池的J-V曲线,通过电化学阻抗谱分析了电池内部电子传输情况。结果表明:以ZnO团聚体/纳米片复合膜组装成的染料敏化太阳能电池其短路电流密度(Jsc),开路电压(Voc),填充因子(FF)和光电转化率(PCE)分别为17.07 m A·cm^(-2),0.69 V,0.68和8.01%,光电转化率相比于ZnO团聚体光阳极电池提高了76.43%。

ZnO nanocrystalline aggregates（NAs）/nanosheets（NSs） composite film was prepared via hydrothermal method, with suspending the ZnO NAs film upside-down in a sealed bottle containing an aqueous solution of 0.07 mol/L zinc nitrate and urea. The reaction temperature and time were 90oC and 7 h. The phase composition and morphology of ZnO NAs powders and ZnO films were characterized by XRD, SEM and TEM. J-V curves of the dye sensitized solar cells（DSSCs） were tested by the solar simulator and Keithley 2400. Electrochemical impedance spectroscopy（EIS） was also carried out to analyze the internal electronic transmission performance. The results showed that the short circuit current density（Jsc）, open circuit voltage（Voc）, fill factor（FF） and photoelectric conversion efficiency（PCE） of the DSSCs assembled with ZnO NAs/NSs composite films were 17.07 m A·cm^（-2）, 0.69 V, 0.68 and 8.01%, respectively. Compared with ZnO NAs DSSCs, the photoelectric conversion efficiency of ZnO NAs/NSs DSSCs increased by 76.43%.