Carbon nanotubes (CNTs) have been far and wide employed as the counter electrodes (CEs) in dye-sensitized solar cells because of their individual physical and chemical properties.However,the tech-niques available now,such as chemical vapor deposition,arc discharge and laser ablation for synthesizing CNTs,commonly suffer from rigorous operations and complicated steps,which make the process difficult to be controlled.Herein,we present a simple and facile glutamic acid-assisted hydrothermal recrystal-lization strategy to construct bamboo-like CNTs (GHP-BC-x).Generally,the conventional organic dye 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) is used as a precursor and glutamic acid efficiently promotes the recrystallization of the perylene cores\' planar π-conjugated system in PTCDA under hydrothermal conditions and then self-assembles into one-dimensional nanorods with improved crystal-lization degree,finally resulting in the morphology of bamboo-like CNTs after carbonization.When applied as the counter electrodes,the GHP-BC-3 displays a remarkable power conversion efficiency of 8.25％,benefiting from the superb electrical conductivity and mass transfer dynamics,superior to that of Pt CE (7.62％).