POS5-0894
Chirality imprinting in a solution-processable conjugated polymer by circularly polarized light
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Junho Bae (Chung-Ang University)
Co-Author(s)
Abstract
Direct, compact detection of circularly polarized light (CPL) without bulky external optics remains a key challenge for chiroptical sensing and photonic–spintronic applications. Most reported strategies rely on chiral small molecule dopants or chiral side chain engineering to preset a preferred helical sense. Here, we report a light-programmable conjugated polymer thin film platform in which the supramolecular handedness of an initially achiral polymer is selected by the handedness of circularly polarized light during photoinduced assembly. The conjugated polymer used in this study undergoes photoinduced self-assembly to form helical aggregates in the solid state. By irradiating the film with left- or right-handed circularly polarized light, the supramolecular chirality of the resulting aggregates can be selectively biased, producing mirror image chiroptical responses without introducing molecular chirality into the polymer backbone. The CPL-induced chiral polymer films were then integrated as the active layer of photodiodes, enabling effective discrimination between left- and right-handed CPL through polarization-dependent photocurrent generation. This strategy demonstrates that circular polarization can serve not only as an optical probe but also as a processing parameter to encode chiral order in conjugated polymer semiconductors. Our approach opens a route to supramolecular chirality and electrically active nanostructures from achiral molecular building blocks, offering a simple and scalable platform for compact CPL photodetectors and chiral optoelectronics
