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Cited by 207

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First-Principles Calculation of the Bulk Photovoltaic Effect in CH3NH3PbI3 and CH3NH3PbI3–xClx

Open access
Zheng, Fan, Takenaka, Hiroyuki, Wang, Fenggong, Koocher, Nathan Z., Rappe, Andrew M.·2015·The Journal of Physical Chemistry Letters

Abstract

Hybrid halide perovskites exhibit nearly 20% power conversion efficiency, but the origin of their high efficiency is still unknown. Here, we compute the shift current, a dominant mechanism of the bulk photovoltaic (PV) effect for ferroelectric photovoltaics, in CH 3 NH 3 PbI 3 and CH 3 NH 3 PbI 3– x Cl x from first-principles. We find that these materials give approximately three times larger shift current PV response to near-IR and visible light than the prototypical ferroelectric photovoltaic BiFeO 3 . The molecular orientations of CH 3 NH 3 + can strongly affect the corresponding PbI 3 inorganic frame so as to alter the magnitude of the shift current response. Specifically, configurations with dipole moments aligned in parallel distort the inorganic PbI 3 frame more significantly than configurations with near-net-zero dipole, yielding a larger shift current response. Furthermore, we explore the effect of Cl substitution on shift current and find that Cl substitution at the equatorial site induces a larger response than does substitution at the apical site.

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Metadata

Authors
Zheng, F., Takenaka, H., Wang, F., Koocher, N. Z., & Rappe, A. M.
Venue
The Journal of Physical Chemistry Letters
Published
2014-12-10
Volume
6
Issue
1
Pages
31-37
ISSN
1948-7185 (ISSN-L)
OpenAlex
W2318483779
Cited by
207
References
3
FWCI
14.33
Type
journal article
Language
en
Open access
green

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