Spacer Cations Dictate Photoinduced Phase Segregation in 2D Mixed Halide Perovskites

Preethi S. Mathew; Jeffrey T. DuBose; Junsang Cho; Prashant V. Kamat

doi:10.1021/acsenergylett.1c01015

journal article·2021-07-09Open access

Spacer Cations Dictate Photoinduced Phase Segregation in 2D Mixed Halide Perovskites

Preethi S. Mathew, Jeffrey T. DuBose, Junsang Cho, Prashant V. Kamat

ACS Energy Letters· Volume 6· Issue 7

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Source abstract

Abstract

The spacer cation in two-dimensional (2D) Ruddlesden–Popper lead halide perovskites dictates photoinduced phase segregation. Halide ion segregation under steady-state irradiation of single-layer (n = 1) 2D perovskites is seen when butylammonium (BA) is used as the spacer cation, whereas it is essentially absent when BA is replaced with phenethylammonium (PEA).

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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Transition Metal Oxide Nanomaterials

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