POS5-0813
Control of Chirality Induction in n-Type Conjugated Polymer by Printing Systems Using Chiral Solvents for CISS-Based Organic Spintronics
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
Jeongwoo Beak (Gwangju Institute of Science and Technology)
Co-Author(s)
Abstract
The chiral-induced spin selectivity (CISS) mechanism, which preferentially transmits electrons with a specific spin orientation through chiral materials, has emerged as a key for next-generation spintronic devices. To functionalize this effect, various strategies have been explored to induce chirality in conjugated polymers. Among them, the use of chiral solvents is particularly promising, as the solvent can be completely removed after post-treatment, leaving no residual chiral material in the final film. This enables a precise investigation of the morphology and spin properties of chiral conjugated polymers. In this work, we employ a solution-based printing technique using chiral solvents to induce and control chirality in the n-type conjugated polymer, P(NDI2OD-T2), achieving a dissymmetry factor ranging from 0 to 0.13. The resulting chiral films are systematically characterized through optical spectroscopy, microscopy, and X-ray analysis to elucidate the relationship between chiroptical properties and morphology. Furthermore, we quantitatively analyze the evolution of chirality as a function of film fabrication conditions. Highly chiral conjugated polymer films are promising candidates for spin transistor applications that exploit the CISS effect. Furthermore, the solution-based printing technique highlights its potential for next-generation organic spintronic devices with flexible, biocompatible architectures.
