Eric Schiff : 0000-0002-4104-7038
Mengjin Yang: 0000-0003-2019-4298
Ranjith Kottokkaran: 0000-0001-5542-2719
Vikram Dalal: 0000-0001-7896-625X
electron, drift, mobility, solar, cells, methylammonium, lead, perovskite
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.
B Maynard, Q Long, E Schiff, M Yang, K Zhu, R Kottokkaran, H Abbas, V Dalal (2016) Electron and hole drift mobility measurements on methylammonium lead iodide perovskite solar cells; DOI: https://doi.org/10.1063/1.4948344; AIP
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