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采用简单的水热路线合成出TiO_2纳米棒阵列,作为染料敏化太阳电池(DSSC)光阳极,并对其形貌、结构和光电特性进行表征。探讨了前驱体溶液总量、Ti源加入量等对产物形貌以及DSSC性能的影响。研究结果表明:增加前驱体溶液中Ti源的加入量将使纳米棒长度和直径同时增加,最终导致形成“蒲公英”状产物,DSSC性能有所提高,同时暗电流也会随之增大;增加前驱体溶液总量也会使纳米棒更长、更密,但DSSC性能提高幅度不大,暗态电流密度-电压(J-V)曲线几乎没有变化。研究将有助于人们更清楚地认识TiO_2纳米棒阵列的生长动力学机制,进而优化纳米棒阵列光电器件的性能。
TiO 2 nanorod arrays were synthesized by a simple hydrothermal route as the photoanode of dye-sensitized solar cells (DSSCs), and their morphology, structure and photoelectric properties were characterized. The effects of the amount of precursor solution and Ti source on the morphology of the product and the properties of DSSC were discussed. The results show that increasing the amount of Ti source in the precursor solution will increase the length and diameter of the nanorods simultaneously, which eventually leads to the formation of “dandelion” -like products with improved DSSC performance and increased dark current; The total amount of precursor solution will also make the nanorods longer and denser, but the improvement of DSSC performance is not big, and the dark current density-voltage (JV) curve hardly changes. The research will help people understand the mechanism of growth kinetics of TiO 2 nanorod array more clearly and optimize the performance of the nanorod array optoelectronic devices.