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采用直接化学沉淀法和均匀化学沉淀法分别制备了不同粒径的ZnO粉体,并分别研究了其在染料敏化太阳电池(DSSC)中的光电性能。通过TG,XRD和SEM对粉体的结构和形貌进行了表征。通过将制备的粉体制成DSSC的阳极,对两种方法制得的ZnO粉体的光阳极的紫外-可见吸收光谱进行分析,并测试了不同方法制备的ZnO薄膜组装的DSSC的伏安曲线。结果表明:两种方法制备的ZnO粉体均为纳米晶,均匀沉淀法制备的ZnO粉体比直接沉淀法制备的颗粒粒径更均匀、更大。均匀沉淀法制备的ZnO薄膜组装的DSSC的短路电流(I_(SC))和转换效率(η)分别为1.99mA/cm~2和0.53%,均高于直接沉淀法制备ZnO的I_(SC)=1.17mA/cm~2和η=0.36%。
ZnO powders with different particle sizes were prepared by direct chemical precipitation and uniform chemical precipitation, respectively. Their photoelectric properties in dye-sensitized solar cells (DSSCs) were studied. The structure and morphology of the powders were characterized by TG, XRD and SEM. The UV-visible absorption spectra of the ZnO anodes prepared by the two methods were analyzed by preparing the prepared powders into DSSC anodes. The voltammetric curves of DSSCs prepared by different methods were tested. . The results show that the ZnO powders prepared by the two methods are all nanocrystalline. The ZnO powders prepared by the uniform precipitation method are more uniform and larger than the particles prepared by the direct precipitation method. The short circuit current (I SC) and conversion efficiency (η) of DSSC fabricated by uniform precipitation method were 1.99mA / cm ~ 2 and 0.53%, respectively, which were higher than those of I_ (SC) ZnO prepared by direct precipitation method. = 1.17 mA / cm 2 and η = 0.36%.