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

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 essent...

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Bibliographic Details
Published in:ACS energy letters 2021-07, Vol.6 (7), p.2499-2501
Main Authors: Mathew, Preethi S, DuBose, Jeffrey T, Cho, Junsang, Kamat, Prashant V
Format: Article
Language:English
Subjects:
Absorption
Cations
Halogens
Inorganic compounds
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Perovskites
SOLAR ENERGY
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Summary: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).
ISSN:2380-8195
2380-8195
DOI:10.1021/acsenergylett.1c01015