Cocrystallization-Mediated Chirality Transfer in π-Conjugated Achiral Polymer/Chiral Small Molecule Hybrid Thin Films
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With the increased attention to chiral optoelectronics based on circularly polarized light (CPL), developing electronics that can convert the intensity and polarization direction of CPL into an electronic signal becomes important. To date, various approaches have been utilized to impart chirality to semiconductor thin films for optoelectronic devices. In this presentation, a versatile strategy for fabricating achiral polymer/chiral molecule hybrid film through co-crystallization-mediated chirality transfer will be suggested. Additionally, a fundamental study has been conducted on how the chirality of chiral molecules is transferred to achiral polymer. Based on the investigations into the morphologies, phase behaviors, and crystalline structures, we found that the chiral molecules were co-crystallized into edge-on lamellar stacking of the polymer chains in the nanogranules when only aromatic solvent was used. As a proof of concept, chiral optoelectronics based on the hybrid films distinguished the polarization direction of the CPLs.