固相研磨法制备ZnO光阳极及其染料敏化太阳能电池性能

摘要

Photoanode, playing a role in dye loading and electronic transmission, is an important part of dye sensitized solar cells (DSSCs). ZnO is one of the most commonly used photoanode materials. In this paper, NaOH and Zn(NO3)2·6H2O were used as raw materials to prepare ZnO-based DSSCs by solid-state grinding method. The effects of water content, reaction temperature and calcination temperature on the properties of ZnO photoanodes and DSSCs were studied. XRD and SEM were used to characterize the phase composition and morphology of ZnO photoanode respectively. The photoelectric performance of DSSCs was measured by using solar simulator, electrochemical workstation and IPCE instrument. Results showed that the DSSCs had optimum performance when the mass ratio of water and NaOH, reaction temperature and calcination temperature of the photoanode were 1 : 1, 75 ℃ and 450 ℃, respectively. The photoelectric conversion efficiency (PCE), the open circuit voltage (Voc), short circuit current density (Jsc) and fill factor (FF) of the DSSCs were 5.51%, 0.70 V, 12.72 mA/cm2 and 0.62 , respectively.%光阳极是染料敏化太阳能电池(dye-sensitized solar cells, 简称DSSCs)的重要组成部分,它起着负载染料和传输电子的作用.ZnO是常用的光阳极材料之一.本文以Zn(NO3)2·6H2O 和NaOH为原料,采用固相研磨法在FTO导电玻璃上制备了ZnO光阳极,并组装成DSSCs.主要研究了水的用量、反应温度和煅烧温度等对ZnO光阳极和DSSCs电池性能的影响.采用X-射线衍射仪(XRD)和扫描电子显微镜(SEM)对ZnO光阳极进行物相和形貌表征,采用太阳光模拟器,电化学工作站和量子效率测试仪对电池性能进行分析.结果表明:当水和NaOH的质量比为1 : 1、反应温度为75 ℃,并且光阳极的煅烧温度为450 ℃时所制备的电池性能最佳,其光电转化效率(photoelectric conversion efficiency,PCE)为5.51%,开路电压(Open-circuit voltage,简称Voc)为0.70 V,短路电流密度(Short-circuit current density,简称Jsc)为12.72 mA/cm2,填充因子(Fill factor,简称FF)为0.62.