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

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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Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0003-6951
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 17; Related Information: Applied Physics Letters
American Institute of Physics (AIP)
Research Org:
NREL (National Renewable Energy Laboratory (NREL), Golden, CO (United States))
Sponsoring Org:
National Science Foundation (NSF)
Country of Publication:
United States
14 SOLAR ENERGY; 36 MATERIALS SCIENCE dielectric oxides; solar cells; hole mobility; time of flight mass spectrometry; temperature measurement