酞菁和N3染料协同敏化对纳米TiO_2薄膜光电池性能的影响

EFFECT OF TiO_2 FILMS SENSITIZED JOINTLY WITH N3 DYES AND PC COMPLEXES OF COPPER ON TiO_2 NANOPARTICLE THIN FILM SOLAR CELLS

采用酞菁染料和N3染料共同对纳米TiO2薄膜进行光敏化处理,并将染色后的纳米TiO2薄膜组装成光电池。用场发射SEM、XRD对制备的纳米TiO2薄膜进行表征,用UV-Vis紫外可见光仪对染色处理后的纳米TiO2薄膜的吸光度进行测量。实验数据表明,与N3染料相比,经两种染料共同敏化后的纳米TiO2薄膜可增加对波长大于570 nm以上光能量的吸收,但这种薄膜对模拟太阳光主波长范围内的光吸收下降了,因而造成两种染料组合敏化电池的短路光电流密度下降了4.73mA/cm2,开路电压减少了60mV。

TiO2 thin films in dye-sensitzed solar cells were sensitized jointly with the N3 dyes and copper phthalocyanine complexes. Their morphology was characterized using a Field-Emission Scanning Electron Microscope. The crystal forms of TiO2 in resulting films was characterized by a X-ray diffractometer, and photoabsorptive properties of the thin films sensitized with two dyes were measured by a UV-Vis Spectrophotometer. The crystal forms of TiO2 in resulting films were characterized by a X-ray diffractometer. The experimental results showed that, comparing with that of N3 dyes, the absorbance of the TiO2 film to light above 570nm increases, but it decreases to light below 570nm, covering the primary wavelength of the simulation solar spectrum, which lead to a decrease of 4.73mA/cm^2 and 60mV in short circuit photocurrent and open circuit voltage of a dye-sensitized solar cell, respectively.