In recent times, the field of dye-sensitised solar cells (DSSC) has made great strides; but has yet to achieve high efficiency with existing photoanode material.To achieve this goal, materials are required that have structural superiority.Tuning the morphology of metal oxide nanomaterials has become one of the most emerging techniques to improve the performance of the photoanode for dye sensitised solar cells (DSSC) application. The diverse morphologies of ZnO based photoanode allow achieving superior photoconversion efficiency in DSSC. Thus, the present study reports the synthesis of ZnO nanorods using microwave technique with various aspect ratios and its utilisation as photoanode for DSSC by changing the microwave power alone. More importantly, the microwave synthesis route has advantages over the conventional synthesis methods in terms of duration of the reaction and uniformity of the nanostructures. The structural and morphological analysis of the samples confirms the formation of nanorods with a preferential growth along the c-axis, which is further assembled to form a flower like structure. Lower microwave irradiation favours the formation of nanorods with a higher aspect ratio due to the variation in axial and lateral growth of ZnO. Among all the samples, the ZnO nanorod with the highest aspect ratio exhibits improved photoconversion efficiency compared to the remaining samples. The photoconversion efficiency of the ZnO photoanode with the highest aspect ratio was found to be 2.5 times greater than that of the lowest aspect ratio. This is explained further based on detailed physicochemical and photoelectrochemical (PEC) analyses, which helps establish the correlation between the charge carrier dynamics and the dye adsorption capacity of the optimal photoanode.

近年来，染料敏化太阳能电池（DSSC）领域取得了长足的进步；但现有光阳极材料尚未达到高效率。要实现这一目标，需要具有结构优势的材料。调整金属氧化物纳米材料的形貌已成为提高染料敏化光阳极性能的最新兴技术之一。太阳能电池（DSSC）应用。ZnO 基光电阳极的多种形态允许在 DSSC 中实现卓越的光转换效率。因此，本研究报告了使用微波技术合成具有各种纵横比的 ZnO 纳米棒，并通过单独改变微波功率将其用作 DSSC 的光电阳极。更重要的是，微波合成路线在反应持续时间和纳米结构的均匀性方面优于传统合成方法。样品的结构和形态分析证实了沿 c 轴优先生长的纳米棒的形成，纳米棒进一步组装形成花状结构。由于 ZnO 轴向和横向生长的变化，较低的微波辐射有利于形成具有更高纵横比的纳米棒。在所有样品中，与其余样品相比，具有最高纵横比的 ZnO 纳米棒表现出更高的光转换效率。发现具有最高纵横比的 ZnO 光阳极的光转换效率是最低纵横比的 2.5 倍。