Electron and Hole Drift Mobility Measurements on Methylammonium Lead Iodide Perovskite Solar Cells

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

doi:10.1063/1.4948344

Electron and Hole Drift Mobility Measurements on Methylammonium Lead Iodide Perovskite Solar Cells

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

Research output: Contribution to journal › Article › peer-review

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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 language	American English
Article number	Article No. 173505
Number of pages	4
Journal	Applied Physics Letters
Volume	108
Issue number	17
DOIs	https://doi.org/10.1063/1.4948344 https://doi.org/10.1063/1.4948344
State	Published - 25 Apr 2016

Bibliographical note

Publisher Copyright:
© 2016 Author(s).

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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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.",

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AU - Yang, Mengjin

AU - Zhu, Kai

AU - Maynard, Brian

AU - Long, Qi

AU - Schiff, Eric

AU - Kottokkaran, Ranjith

AU - Abbas, Hisham

AU - Dalal, Vikram

PY - 2016/4/25

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N2 - 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.

AB - 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.

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KW - solar cells

KW - temperature measurement

KW - time of flight mass spectrometry

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Electron and Hole Drift Mobility Measurements on Methylammonium Lead Iodide Perovskite Solar Cells

Abstract

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Keywords

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