Shao, Y., Gao, W., Yan, H., Li, R., Abdelwahab, I., Chi, X., Rogée, L., Zhuang, L., Fu, W., Lau, S. P., Yu, S. F., Cai, Y., Loh, K. P., & Leng, K. (2022). Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites. Nature Communications, 13(1), Article 138. https://doi.org/10.1038/s41467-021-27747-x
Shao, Yan ; Gao, Wei ; Yan, Hejin et al. / Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites. In: Nature Communications. 2022 ; Vol. 13, No. 1.
@article{1373059a3c00463da5e2a8ff4e49e4b7,
title = "Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites",
abstract = "Molecularly soft organic-inorganic hybrid perovskites are susceptible to dynamic instabilities of the lattice called octahedral tilt, which directly impacts their carrier transport and exciton-phonon coupling. Although the structural phase transitions associated with octahedral tilt has been extensively studied in 3D hybrid halide perovskites, its impact in hybrid 2D perovskites is not well understood. Here, we used scanning tunneling microscopy (STM) to directly visualize surface octahedral tilt in freshly exfoliated 2D Ruddlesden-Popper perovskites (RPPs) across the homologous series, whereby the steric hindrance imposed by long organic cations is unlocked by exfoliation. The experimentally determined octahedral tilts from n = 1 to n = 4 RPPs from STM images are found to agree very well with out-of-plane surface octahedral tilts predicted by density functional theory calculations. The surface-enhanced octahedral tilt is correlated to excitonic redshift observed in photoluminescence (PL), and it enhances inversion asymmetry normal to the direction of quantum well and promotes Rashba spin splitting for n > 1.",
author = "Yan Shao and Wei Gao and Hejin Yan and Runlai Li and Ibrahim Abdelwahab and Xiao Chi and Lukas Rog{\'e}e and Lyuchao Zhuang and Wei Fu and Lau, {Shu Ping} and Yu, {Siu Fung} and Yongqing Cai and Loh, {Kian Ping} and Kai Leng",
note = "Publisher Copyright: {\textcopyright} 2022, The Author(s).",
year = "2022",
month = dec,
doi = "10.1038/s41467-021-27747-x",
language = "English",
volume = "13",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}
Shao, Y, Gao, W, Yan, H, Li, R, Abdelwahab, I, Chi, X, Rogée, L, Zhuang, L, Fu, W, Lau, SP, Yu, SF, Cai, Y, Loh, KP & Leng, K 2022, 'Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites', Nature Communications, vol. 13, no. 1, 138. https://doi.org/10.1038/s41467-021-27747-x
Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites. /
Shao, Yan; Gao, Wei; Yan, Hejin et al.
In:
Nature Communications, Vol. 13, No. 1, 138, 12.2022.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites
AU - Shao, Yan
AU - Gao, Wei
AU - Yan, Hejin
AU - Li, Runlai
AU - Abdelwahab, Ibrahim
AU - Chi, Xiao
AU - Rogée, Lukas
AU - Zhuang, Lyuchao
AU - Fu, Wei
AU - Lau, Shu Ping
AU - Yu, Siu Fung
AU - Cai, Yongqing
AU - Loh, Kian Ping
AU - Leng, Kai
N1 - Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - Molecularly soft organic-inorganic hybrid perovskites are susceptible to dynamic instabilities of the lattice called octahedral tilt, which directly impacts their carrier transport and exciton-phonon coupling. Although the structural phase transitions associated with octahedral tilt has been extensively studied in 3D hybrid halide perovskites, its impact in hybrid 2D perovskites is not well understood. Here, we used scanning tunneling microscopy (STM) to directly visualize surface octahedral tilt in freshly exfoliated 2D Ruddlesden-Popper perovskites (RPPs) across the homologous series, whereby the steric hindrance imposed by long organic cations is unlocked by exfoliation. The experimentally determined octahedral tilts from n = 1 to n = 4 RPPs from STM images are found to agree very well with out-of-plane surface octahedral tilts predicted by density functional theory calculations. The surface-enhanced octahedral tilt is correlated to excitonic redshift observed in photoluminescence (PL), and it enhances inversion asymmetry normal to the direction of quantum well and promotes Rashba spin splitting for n > 1.
AB - Molecularly soft organic-inorganic hybrid perovskites are susceptible to dynamic instabilities of the lattice called octahedral tilt, which directly impacts their carrier transport and exciton-phonon coupling. Although the structural phase transitions associated with octahedral tilt has been extensively studied in 3D hybrid halide perovskites, its impact in hybrid 2D perovskites is not well understood. Here, we used scanning tunneling microscopy (STM) to directly visualize surface octahedral tilt in freshly exfoliated 2D Ruddlesden-Popper perovskites (RPPs) across the homologous series, whereby the steric hindrance imposed by long organic cations is unlocked by exfoliation. The experimentally determined octahedral tilts from n = 1 to n = 4 RPPs from STM images are found to agree very well with out-of-plane surface octahedral tilts predicted by density functional theory calculations. The surface-enhanced octahedral tilt is correlated to excitonic redshift observed in photoluminescence (PL), and it enhances inversion asymmetry normal to the direction of quantum well and promotes Rashba spin splitting for n > 1.
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U2 - 10.1038/s41467-021-27747-x
DO - 10.1038/s41467-021-27747-x
M3 - Article
C2 - 35013412
AN - SCOPUS:85122862881
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 138
ER -
Shao Y, Gao W, Yan H, Li R, Abdelwahab I, Chi X et al. Unlocking surface octahedral tilt in two-dimensional Ruddlesden-Popper perovskites. Nature Communications. 2022 Dec;13(1):138. doi: 10.1038/s41467-021-27747-x