采用恒电位方法,选择氯化钾和乙二胺(EDA)为添加剂,在氧化铟锡(ITO)导电玻璃上制备了高度有序的ZnO纳米片阵列,通过二次电沉积得到了ZnO纳米片上生长纳米棒的微纳分级结构.利用化学浴沉积法在ZnO基底上沉积Sb2S3纳米粒子制备出了Sb2S3/ZnO纳米片壳核结构和Sb2S3/ZnO微纳分级壳核结构.利用扫描电子显微镜(SEM)、X射线衍射(XRD)、紫外-可见(UV-Vis)吸收光谱、瞬态光电流等对其形貌、结构组成和光电化学性能进行了表征和分析.结果表明,Sb2S3/ZnO纳米片上生长纳米棒分级壳核结构的光电流明显高于Sb2S3/ZnO纳米片壳核结构.在Sb2S3/ZnO纳米片壳核结构和Sb2S3/ZnO微纳分级壳核结构的基础上旋涂一层P3HT薄膜形成P3HT/Sb2S3/ZnO复合结构,以上述复合结构薄膜为光活性层组装成杂化太阳电池,其中,P3HT/Sb2S3/ZnO分级壳核结构杂化太阳电池的能量转换效率最高,达到了0.81%.
We fabricated highly ordered ZnO nanosheet arrays on ITO substrates by adding KCl and ethylenediamine(EDA) through potentiostatic deposition, then produced a hierarchical structure of ZnO nanorods on the nanosheets by using secondary electrodeposition. Shell-core Sb2S3/ZnO nanostructures were prepared from ZnO nanosheets and ZnO nanorods on nanosheets by chemical bath deposition. The nanostructures were characterized using scanning electron microscopy(SEM) and X-ray diffraction(XRD),and their photoelectrochemical properties were investigated using ultraviolet-visible spectroscopy(UV-Vis) and photocurrent measurements. The shell-core Sb2S3/ZnO based on the hierarchical micronanostructure had higher photocurrent than did the shell-core Sb2S3/ZnO nanosheets. A hybrid solar cell was fabricated with a P3HT/Sb2S3/ZnO film as the photoactive layer. The P3HT/Sb2S3/ZnO hierarchical electrode exhibited an energy conversion efficiency as high as 0.81%.