酞菁染料ZnPc和Q-PbS复合敏化纳米晶ZnO薄膜电极的研究

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。

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

In order to study on the photoelectric properties of nanocrystalline Z nO thin films which will serve as the anode material of dye-sensitised solar cell (DSSC),the fabrication of nano crystalline ZnO thin films and a series of measurements and characterizations were carried out in this paper.Firs tly,nanocrystalline ZnO films were fabricated on FTO-glass substrates by the sol-gel spin coating method and a ra pid thermal treatment.And the crystal phase and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM),respectively.Se condly,using ZnPc dye and PbS quantum dots (Q-PbS) as sensitizers,FTO/ZnO/ZnPc electrode,FTO/ZnO/Q-PbS electrode,and FTO/ZnO/Q-PbS/ZnPc electrode were prepared,respectively.And the UV-vis absor bance spectra of these electrodes were measured and analyzed.The results show that ZnPc dye and Q-P bS could well sensitize the ZnO nanoparticle film electrodes,among them,the sensitization effect of Q-PbS is better than that of ZnPc dye, and the effect of composite sensitization of ZnPc dye and Q-PbS is optimal.Fi nally,utilizing FTO/ZnO/Q-PbS/ZnPc electrode whose sensitization effect is optimal as photoele ctrode,a solar cell device was fabricated and its working characteristic curve (I-V cu rve was measured).In simula tions,a fill factor of 0.348,a schort-circuit photocurrent of 1.42mA,an open-circuit voltage of 304mV,and a overall light to electricity conversion efficiency of 0.696% are obtained.