High efficiency solid-state sensitized solar cell-based on submicrometer rutile TiO2 nanorod and CH3NH3PbI3 perovskite sensitizer

  • Kim H
  • Lee J
  • Yantara N
 et al. 
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We report a highly efficient solar cell based on a submicrometer (~0.6 μm) rutile TiO2 nanorod sensitized with CH3NH3PbI3 perovskite nanodots. Rutile nanorods were grown hydrothermally and their lengths were varied through the control of the reaction time. Infiltration of spiro-MeOTAD hole transport material into the perovskite-sensitized nanorod films demonstrated photocurrent density of 15.6 mA/cm(2), voltage of 955 mV, and fill factor of 0.63, leading to a power conversion efficiency (PCE) of 9.4% under the simulated AM 1.5G one sun illumination. Photovoltaic performance was significantly dependent on the length of the nanorods, where both photocurrent and voltage decreased with increasing nanorod lengths. A continuous drop of voltage with increasing nanorod length correlated with charge generation efficiency rather than recombination kinetics with impedance spectroscopic characterization displaying similar recombination regardless of the nanorod length.

Author-supplied keywords

  • CH3NH 3PbI3
  • Solid-state dye-sensitized solar cell
  • impedance spectroscopy
  • nanorod
  • perovskite
  • rutile

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  • Hui Seon Kim

  • Jin Wook Lee

  • Natalia Yantara

  • Pablo P. Boix

  • Sneha A. Kulkarni

  • Subodh Mhaisalkar

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