Electron and Hole Drift Mobility Measurements on Methylammonium Lead Iodide Perovskite Solar Cells: Article No. 173505

Mengjin Yang, Kai Zhu, Brian Maynard, Qi Long, Eric Schiff, Ranjith Kottokkaran, Hisham Abbas, Vikram Dalal

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61 Scopus Citations

Abstract

We report nanosecond domain time-of-flight measurements of electron and hole photocarriers in methylammonium lead iodide perovskite solar cells. The mobilities ranged from 0.06 to 1.4 cm2/Vs at room temperature, but there is little systematic difference between the two carriers. We also find that the drift mobilities are dispersive (time-dependent). The dispersion parameters are in the range of 0.4-0.7, and they imply that terahertz domain mobilities will be much larger than nanosecond domain mobilities. The temperature-dependences of the dispersion parameters are consistent with confinement of electron and hole transport to fractal-like spatial networks within nanoseconds of their photogeneration.
Original languageAmerican English
Number of pages4
JournalApplied Physics Letters
Volume108
Issue number17
DOIs
StatePublished - 2016

NREL Publication Number

  • NREL/JA-5900-66605

Keywords

  • dielectric oxides
  • hole mobility
  • solar cells
  • temperature measurement
  • time of flight mass spectrometry

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