Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/139331
Title: Bistable amphoteric native defect model of perovskite photovoltaics
Authors: Walukiewicz, Wladek
Rey-Stolle, Ignacio
Han, Guifang
Jaquez, Maribel
Broberg, Danny
Xie, Wei
Sherburne, Matthew
Mathews, Nripan
Asta, Mark
Keywords: Engineering::Chemical engineering
Issue Date: 2018
Source: Walukiewicz, W., Rey-Stolle, I., Han, G., Jaquez, M., Broberg, D., Xie, W., . . . Asta, M. (2018). Bistable amphoteric native defect model of perovskite photovoltaics. The Journal of Physical Chemistry Letters, 9(14), 3878-3885. doi:10.1021/acs.jpclett.8b01446
Journal: The Journal of Physical Chemistry Letters
Abstract: The past few years have witnessed unprecedented rapid improvement of the performance of a new class of photovoltaics based on halide perovskites. This progress has been achieved even though there is no generally accepted mechanism of the operation of these solar cells. Here we present a model based on bistable amphoteric native defects that accounts for all key characteristics of these photovoltaics and explains many idiosyncratic properties of halide perovskites. We show that a transformation between donor-like and acceptor-like configurations leads to a resonant interaction between amphoteric defects and free charge carriers. This interaction, combined with the charge transfer from the perovskite to the electron and hole transporting layers results in the formation of a dynamic n-i-p junction whose photovoltaic parameters are determined by the perovskite absorber. The model provides a unified explanation for the outstanding properties of the perovskite photovoltaics, including hysteresis of J-V characteristics and ultraviolet light-induced degradation.
URI: https://hdl.handle.net/10356/139331
ISSN: 1948-7185
DOI: 10.1021/acs.jpclett.8b01446
Rights: © 2018 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles

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