Charge Transport in Hybrid Halide Perovskites

Abstract

Charge transport is crucial to the performance of hybrid halide perovskite solar cells. A theoretical model based on large polarons is proposed to elucidate charge transport properties in the perovskites. Critical new physical insights are incorporated into the model, including the recognitions that acoustic phonons as opposed to optical phonons are responsible for the scattering of the polarons; these acoustic phonons are fully excited due to the "softness" of the perovskites, and the temperature-dependent dielectric function underlies the temperature dependence of charge carrier mobility. This work resolves key controversies in literature and forms a starting point for more rigorous first-principles predictions of charge transport.

arXiv comment9 figures, 15 pages, accepted by Phys. Rev. B

References in corpus (10)

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Cited by in corpus (5)

• Calculating polaron mobility in halide perovskites
• Carrier Lifetimes and Polaronic Mass Enhancement in the Hybrid Halide Perovskite CH${}_3$NH${}_3$PbI${}_3$ from Multiphonon Fröhlich Coupling
• Quantifying polaronic effects on charge-carrier scattering and mobility in lead--halide perovskites
• Visualization of carrier transport in lateral metal-perovskite-metal structures and its influence on device operation
• Radiative recombination of large polarons in halide perovskites