Rashba Band Splitting and Bulk Photovoltaic Effect Induced by Halogen Bonds in Hybrid Layered Perovskites
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | e202304486 |
Journal / Publication | Angewandte Chemie (International Edition) |
Volume | 62 |
Issue number | 29 |
Online published | 12 Jun 2023 |
Publication status | Published - 17 Jul 2023 |
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Abstract
Non-covalent interactions play an essential role in directing the self-assembly of hybrid organic-inorganic crystals. In hybrid halide perovskites, hydrogen bonding has been the paramount non-covalent interaction. Here, we show another non-covalent interaction, namely, the halogen bond interaction, that directs a symmetry-breaking assembly in a new series of two-dimensional (2D) perovskites (ICH2CH2NH3)2(CH3NH3)n-1PbnI3n+1 (n is the layer thickness, n=1-4). Structural analysis shows that the halogen bond strength varies with the layer thickness. For the odd number (n=1, 3) layered perovskites, stronger halogen interaction leads to centrosymmetric structures, whereas for the n=2 layered perovskites, weaker halogen bonds result in non-centrosymmetric structures. Transient reflection spectroscopy shows a suppressed radiative recombination rate (k2 ≈ 0) and prolonged spin lifetime for n=2 structure, suggesting an enhanced Rashba band splitting effect. The structural asymmetry is further confirmed with a reversible bulk photovoltaic effect. Our work provides a new design strategy to enable hybrid perovskites with emerging properties and functionalities associated with structural asymmetry. © 2023 Wiley-VCH GmbH
Research Area(s)
- Bulk Photovoltaic Effect, Layered Perovskite, Rashba Band Splitting, Structure-Property Relationship, Symmetry Breaking, HALIDE PEROVSKITE, CHARGE-CARRIER, SOLAR-CELLS, ORGANIC CATIONS, HYDROGEN, RECOMBINATION, DYNAMICS, MODULATION, EFFICIENCY, LIFETIME
Citation Format(s)
Rashba Band Splitting and Bulk Photovoltaic Effect Induced by Halogen Bonds in Hybrid Layered Perovskites. / Xue, Jie; Huang, Yuling; Liu, Yang et al.
In: Angewandte Chemie (International Edition), Vol. 62, No. 29, e202304486, 17.07.2023.
In: Angewandte Chemie (International Edition), Vol. 62, No. 29, e202304486, 17.07.2023.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review