Electron and hole drift mobility measurements on methylammonium lead iodide perovskite solar cells

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

Research output: Contribution to journalArticle

39 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 languageEnglish (US)
Article number173505
JournalApplied Physics Letters
Volume108
Issue number17
DOIs
StatePublished - Apr 25 2016

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Maynard, B., Long, Q., Schiff, E. A., Yang, M., Zhu, K., Kottokkaran, R., Abbas, H., & Dalal, V. L. (2016). Electron and hole drift mobility measurements on methylammonium lead iodide perovskite solar cells. Applied Physics Letters, 108(17), [173505]. https://doi.org/10.1063/1.4948344