Wang Yang, Li Zhen, Li Fei, Tian Yunfeng, Zhao Wen, Liu Xueqin, Yang Jianbo
J Nanosci Nanotechnol. 2016 Jun;16(6):6086-92. doi: 10.1166/jnn.2016.10905.
The crystallized free-standing through-hole TiO2 nanotube arrays (TNAs) membranes were fabricated by a facile method. CdS quantum dots (QDs) are assembled onto free-standing through-hole NTAs films using successive ionic layer adsorption and reaction (SILAR) process. The CdS/TNAs were easily transferred to the fluorine-doped tin oxide glass to form photoanodes after they were sensitized by modifying the traditional procedure. The morphology and crystalline phase of the TiO2 nanotubes were studied by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The cells with 5 SILAR cycles show photovoltaic conversion efficiency as high as 3.34% under simulated sunlight (AM 1.5, 100 mW x cm(-2)). Obviously, the new approach promotes the uniform distribution of CdS on the densely aligned TNAs and prevents the clogging of CdS quantum dots (QDs) at the TiO2 nanotube mouth. Such enhanced properties may be ascribed to the strong combination between CdS and TiO2, favorable for charge separation of TNAs.
通过一种简便的方法制备了结晶的独立式通孔二氧化钛纳米管阵列（TNAs）膜。使用连续离子层吸附和反应（SILAR）工艺将硫化镉量子点（QDs）组装到独立式通孔纳米管阵列薄膜上。通过改进传统工艺对硫化镉/二氧化钛纳米管阵列进行敏化后，它们很容易转移到氟掺杂氧化锡玻璃上形成光阳极。用场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）研究了二氧化钛纳米管的形态和晶相。在模拟太阳光（AM 1.5，100 mW x cm(-2)）下，经过5个SILAR循环的电池显示出高达3.34%的光电转换效率。显然，这种新方法促进了硫化镉在紧密排列的二氧化钛纳米管阵列上的均匀分布，并防止了硫化镉量子点（QDs）在二氧化钛纳米管口堵塞。这种增强的性能可能归因于硫化镉和二氧化钛之间的强结合，有利于二氧化钛纳米管阵列的电荷分离。
