Performance of zinc oxide (ZnO) nanorods directly grown on fluorine-doped tin oxide (FTO) electrode at different precursor concentration and hydrothermal reaction time as an electron transport layers (ETL) in chloride modified perovskite solar cell (PSC) has been examined. The obtained ZnO nanorods were characterized using a field emission electron microscope (FESEM) to reveal nanorods morphology whereas X-ray diffraction (XRD) was used to examine the crystal structure and the phase formed. Performance of ZnO nanorods as an ETL in a PSC device was examined by analyzing current and voltage (I-V) curves obtained through a semiconductor parameter analyzer. The results showed that with the increase of reaction time and precursor concentrations during the hydrothermal process increased diameter, crystallinity, and peak intensity of the obtained ZnO nanorods. The optimum power conversion efficiency of 2.740% was obtained from the sample with precursor concentration of 0.0375 M and hydrothermally synthesized for 3 hours.