Chirality as a Structural Degree of Freedom in Halide Perovskites
- 1Jawaharlal Nehru Centre for Advanced Scientific Research , , Jakkur , ,
Abstract
Chirality in halide perovskites has traditionally been associated with the incorporation of intrinsically chiral molecular components. Here, we develop a broader perspective in which chirality can emerge from the collective structural organization of an otherwise achiral inorganic lattice. We distinguish the structural origins of chirality, including molecular or ligand-mediated interactions, cooperative lattice distortions, surfaces and interfaces, and dynamic structural fluctuations, from the thermodynamic and structural parameters that control these states, including strain, dimensionality, confinement, temperature, pressure, and composition. Particular emphasis is placed on distinguishing structural distortion and inversion symmetry breaking from genuine chirality, which requires the absence of all improper symmetry operations and sufficient spatial correlation of the handed structural state. Two halide perovskite systems, Cs2PbI2Cl2 nanoplatelets and CsPbBr3 nanorods, illustrate complementary examples in which structural perturbations are associated with pronounced chiroptical responses. We further outline experimental criteria for establishing structural chirality and discuss opportunities for selecting, switching, and coupling handed structural states to optical, electronic, spin, and magnetic functionalities.
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BibTeX
@article{k2026chirality,
title = {{Chirality as a Structural Degree of Freedom in Halide Perovskites}},
author = {Suhas K. T. and Ranjani Viswanatha},
journal = {ACS Omega},
year = {2026},
month = oct,
doi = {10.1021/acsomega.6c10705},
url = {https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c10705/5458732/Chirality-as-a-Structural-Degree-of-Freedom-in},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - JOUR
TI - Chirality as a Structural Degree of Freedom in Halide Perovskites
AU - Suhas K. T.
AU - Ranjani Viswanatha
PY - 2026
DA - 2026/10/27
JO - ACS Omega
DO - 10.1021/acsomega.6c10705
UR - https://pubs.acs.org/acsodf/article/doi/10.1021/acsomega.6c10705/5458732/Chirality-as-a-Structural-Degree-of-Freedom-in
AB - Chirality in halide perovskites has traditionally been associated with the incorporation of intrinsically chiral molecular components. Here, we develop a broader perspective in which chirality can emerge from the collective structural organization of an otherwise achiral inorganic lattice. We distinguish the structural origins of chirality, including molecular or ligand-mediated interactions, cooperative lattice distortions, surfaces and interfaces, and dynamic structural fluctuations, from the thermodynamic and structural parameters that control these states, including strain, dimensionality, confinement, temperature, pressure, and composition. Particular emphasis is placed on distinguishing structural distortion and inversion symmetry breaking from genuine chirality, which requires the absence of all improper symmetry operations and sufficient spatial correlation of the handed structural state. Two halide perovskite systems, Cs2PbI2Cl2 nanoplatelets and CsPbBr3 nanorods, illustrate complementary examples in which structural perturbations are associated with pronounced chiroptical responses. We further outline experimental criteria for establishing structural chirality and discuss opportunities for selecting, switching, and coupling handed structural states to optical, electronic, spin, and magnetic functionalities.
SN - 2470-1343
ER -