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Title: The bright side and dark side of hybrid organic–inorganic perovskites
Authors: Walukiewicz, Wladek
Wang, Shu
Wu, Xinchun
Li, Rundong
Sherburne, Matthew P.
Wu, Bo
Sum, Tze Chien
Ager, Joel W.
Asta, Mark D.
Keywords: Science::Physics::Optics and light
Issue Date: 2020
Source: Walukiewicz, W., Wang, S., Wu, X., Li, R., Sherburne, M. P., Wu, B., ... Asta, M. D. (2020). The bright side and dark side of hybrid organic–inorganic perovskites. The Journal of Physical Chemistry C, 124(50), 27340–27355. doi:10.1021/acs.jpcc.0c08263
Project: M4082480
Journal: The Journal of Physical Chemistry C
Abstract: The previously developed bistable amphoteric native defect (BAND) model is used for a comprehensive explanation of the unique photophysical properties and for understanding the remarkable performance of perovskites as photovoltaic materials. It is shown that the amphoteric defects in donor (acceptor) configuration capture a fraction of photoexcited electrons (holes) dividing them into two groups: higher energy bright and lower energy dark electrons (holes). The spatial separation of the dark electrons and the dark holes and the k-space separation of the bright and the dark charge carriers reduce electron hole recombination rates, emulating the properties of an ideal photovoltaic material with a balanced, spatially separated transport of electrons and holes. The BAND model also offers a straightforward explanation for the exceptional insensitivity of the photovoltaic performance of polycrystalline perovskite films to structural and optical inhomogeneities. The blue-shifted radiative recombination of bright electrons and holes results in a large anti-Stokes effect that provides a quantitative explanation for the spectral dependence of the laser cooling effect measured in perovskite platelets.
ISSN: 1932-7447
DOI: 10.1021/acs.jpcc.0c08263
DOI (Related Dataset): 10.21979/N9/9LBMRG
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: embargo_20211224
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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