TY - JOUR
T1 - Unravelling the structural complexity and photophysical properties of adamantyl-based layered hybrid perovskites
AU - Jahanbakhshi, Farzaneh
AU - Mladenović, Marko
AU - Kneschaurek, Ekaterina
AU - Merten, Lena
AU - Gélvez-Rueda, María C.
AU - Ahlawat, Paramvir
AU - Li, Yang
AU - Carlsen, Brian
AU - Grozema, Ferdinand C.
AU - More Authors, null
PY - 2020
Y1 - 2020
N2 - Layered hybrid perovskites comprising adamantyl spacer (A) cations based on the A2FAn−1PbnI3n+1(n= 1-3, FA = formamidinium) compositions have recently been shown to act as promising materials for photovoltaic applications. While the corresponding perovskite solar cells show performances and stabilities that are superior in comparison to other layered two-dimensional formamidinium-based perovskite solar cells, the underlying reasons for their behaviour are not well understood. We provide a comprehensive investigation of the structural and photophysical properties of this unique class of materials, which is complemented by theoretical analysisviamolecular dynamics simulations and density functional theory calculations. We demonstrate the formation of well-defined structures of lower compositional representatives based onn= 1-2 formulations with (1-adamantyl)methanammonium spacer moieties, whereas higher compositional representatives (n> 2) are shown to consist of mixtures of low-dimensional phases evidenced by grazing incidence X-ray scattering. Furthermore, we reveal high photoconductivities of the corresponding hybrid perovskite materials, which is accompanied by long charge carrier lifetimes. This study thereby unravels features that are relevant for the performance of FA-based low-dimensional hybrid perovskites.
AB - Layered hybrid perovskites comprising adamantyl spacer (A) cations based on the A2FAn−1PbnI3n+1(n= 1-3, FA = formamidinium) compositions have recently been shown to act as promising materials for photovoltaic applications. While the corresponding perovskite solar cells show performances and stabilities that are superior in comparison to other layered two-dimensional formamidinium-based perovskite solar cells, the underlying reasons for their behaviour are not well understood. We provide a comprehensive investigation of the structural and photophysical properties of this unique class of materials, which is complemented by theoretical analysisviamolecular dynamics simulations and density functional theory calculations. We demonstrate the formation of well-defined structures of lower compositional representatives based onn= 1-2 formulations with (1-adamantyl)methanammonium spacer moieties, whereas higher compositional representatives (n> 2) are shown to consist of mixtures of low-dimensional phases evidenced by grazing incidence X-ray scattering. Furthermore, we reveal high photoconductivities of the corresponding hybrid perovskite materials, which is accompanied by long charge carrier lifetimes. This study thereby unravels features that are relevant for the performance of FA-based low-dimensional hybrid perovskites.
UR - http://www.scopus.com/inward/record.url?scp=85090795035&partnerID=8YFLogxK
U2 - 10.1039/d0ta05022a
DO - 10.1039/d0ta05022a
M3 - Article
AN - SCOPUS:85090795035
VL - 8
SP - 17732
EP - 17740
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 34
ER -