Herein, we are reporting carboxylic acid-functionalized multi-walled carbon nanotubes-polyindole/Ti2O3 hybrid nanocomposite (f-MWCNTs-PIN/Ti2O3) synthesis, phase structure and morphology studies with extended applications. FE-SEM, and TGA results shows that the hybrid nanocomposite having good thermal stability. This hybrid nanocomposite is utilized to prepare a photo-anode of dye-sensitized solar cells (DSSCs). Interestingly, the doped with TiO2 (f-MWCNTs-PIN/Ti2O3/TiO2) hybrid nanocomposite based photo-anode for DSSC reported power conversion efficiency (PCE) of 8.6% and it is about 6% higher than that of un-doped TiO2 photo-anode. The corresponding short-circuit photocurrent density (J(SC)) of 18.30 mA cm(-2), open circuit voltage (V-OC) of 0.71 V, fill factor (FF) of 0.66, and dye absorption amount is 0.16 x 10(-6) mol cm(-2) respectively. The obtained results suggest that the hybrid nanocomposite is a suitable photo-anodic material for DSSCs applications. (C) 2017 Elsevier B.V. All rights reserved.