酞菁染料ZnPc和Q-PbS复合敏化纳米晶ZnO薄膜电极的研究

Study on nanocrystalline ZnO film electrode with ZnPc dye and PbS quantum dots composite sensitization

利用溶胶-凝胶旋涂镀膜法结合热处理工艺在FTO玻璃上制备了ZnO薄膜,并通过X射线衍射(XRD)、扫描电子镜(SEM)对其晶相及表面形貌进行了表征;以酞菁染料ZnPc和窄禁带半导体PbS量子点(Q-PbS)为敏化剂,分别制备了FTO/ZnO/ZnPc电极、FTO/ZnO/Q-PbS电极和FTOZnO/Q-PbS/ZnPc电极,结果表明,ZnPc和Q-PbS对ZnO纳米颗粒膜产生了良好的敏化作用,且两者的复合敏化效果最好;制备了FTO/ZnO/Q-PbS/ZnPc为光阳极的染料敏化太阳能电池(DSSC),在模拟太阳光下,电池的开路电压为304mV,短路电流为1.42mA,光电转换效率为0.696%,填充因子为0.348。

In order to study on the photoelectric properties of nanocrystalline ZnO thin films which will serve as the anode material of dye-sensitised solar cell （DSSC）,the fabrication of nanocrystalline ZnO thin films and a series of measurements and characterizations were carried out in this paper. Firstly, nanocrystalline ZnO films were fabricated on FTO-glass substrates by the sol-gel spin coating method and a rapid thermal treatment. And the crystal phase and morphology were characterized by X-ray dif- fraction （XRD） and scanning electron microscopy （SEM）, respectively. Secondly, using ZnPc dye and PbS quantum dots （QPbS） as sensitizers, FTO/ZnO/ZmPc electrode, FTO/ZnO/Q-PbS electrode, and FTO/ZnO/QPbS/ZnPc electrode were prepared, respectively. And the UV-vis absorbance spectra of these electrodes were measured and analyzed. The results show that ZnPc dye and Q-PbS could well sensitize the ZnO nanoparticle film electrodes, among them, the sensitization effect of Q-PbS is better than that of ZnPc d3}e, and the effect of composite sensitization of ZnPc dye and Q-PbS is optimal. Final- ly, utilizing FI＇O/ZnO/QPbS/ZnPc electrode whose sensitization effect is optimal as photoelectrode, a solar cell device was fabricated and its working characteristic curve （I-V curve was measured）. In simu lations,a fill factor of 0. 348, a schort-circuit photocurrent of 1.42 mA, an open-circuit voltage of 304 mV,and a overall light to electricity conversion efficiency of 0. 696% are obtained.