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Updated: Jan 18, 2026

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
Helically ordered chiral super spaces enable optical chirality in hybrid organic-inorganic perovskite crystals
Jae-Jin Lee1, Tae-Woong Moon1, Fumito Araoka2
1Department of Advanced Materials Engineering for Information & Electronics, Kyung Hee University, Gyeonggi-do 17104, Republic of Korea.
Abstract:
We present a supramolecular templating strategy for inducing chirality in hybrid perovskites via confined crystallization within chiral super spaces-nanoconfined, helically ordered cavities formed by the self-assembly of achiral bent-core molecules with chiral additives. Upon removal of the additives, the resulting porous films retain permanent chirality. Quasi-2D hybrid organic-inorganic perovskites crystallized within these templates exhibit distinct chiroptical activity, including mirror-image circular dichroism and circularly polarized light emitting (CPLE), with CPLE dissymmetry factors reaching up to 1.3 × 10-1. The induced chirality originates from symmetry breaking during nucleation, reinforced by host-guest interfacial interactions and asymmetric lattice distortion under spatial confinement. Furthermore, the efficiency of chirality transfer is highly sensitive to pore size, with enlarged cavities leading to reduced optical activity. These findings demonstrate that chiral supramolecular templates provide a robust and tunable platform for directing symmetry breaking and fabricating intrinsically chiral materials from achiral precursors.
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