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Updated: Aug 26, 2026

An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Chirality induced by supramolecular self-assembly of fluorinated π-conjugated carbon dots for bright circularly
Yuxin Shi1, Qian Teng1, Qinghua Tan1
1Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, China.
Abstract:
Circularly polarized light-emitting diodes hold great promise for advanced photonic applications such as three-dimensional displays, quantum information processing, and optical spintronics. Carbon dots, owing to their metal-free nature, high stability, and structural versatility, have emerged as attractive alternatives. However, their intrinsic chirality is typically weak due to a lack of precise control over structure and molecular arrangement, and their application in electroluminescent devices has remained unrealized. Here, we report a class of supramolecular assemblies consisting of fluorinated π-conjugated carbon dots. Upon interaction with M/P-[N] hexahelicene as chiral inducers, a directed supramolecular self-assembly is formed via strong electrostatic and hydrogen bonding interactions, yielding a high absorption dissymmetry factor of up to 0.107. More significantly, we demonstrate the devices based on these supramolecular assemblies, achieving a maximum luminance of 9655 cd m-2 and electroluminescent dissymmetry factor value of 0.035. These results mark a significant step toward metal-free chiral optoelectronics and highlight the potential of carbon nanomaterials in next-generation display technologies.
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