Abstract
Circularly polarized luminescence (CPL)-active nanomaterials have attracted tremendous attention. However, it is still a big challenge to conveniently fabricate multi-color and white CPL-active nanomaterials on a large scale. Herein, a simple and scalable approach to achieve the above goals is presented. Multicolor CPL-active nanofibers are fabricated from chiral helical substituted polyacetylene, achiral fluorescent dyes and polyacrylonitrile via uniaxial electrospinning; the highest luminescence dissymmetry factor (glum) of the resulting nanofibers can reach 10− 2. Furthermore, white CPL-active nanofibers are obtained by coaxial electrospinning, in which the resulting core-shell structure has excellent adjustability and can be utilized to physically isolate different fluorescent dyes to reduce energy transfer efficiency; therefore, stable white CPL emissions can be achieved with high glum values up to 10− 3. Notably, the prepared white-emission CPL nanofibrous films show bright white circularly polarized light when coated on UV chips, demonstrating their future application in constructing low-cost and flexible light-emitting devices such as circularly polarized light-emitting diodes.
Graphical Abstract
Multi-color tunable and white circularly polarized luminescence (CPL)-active nanofibers are prepared from chiral helical polymers and commercial fluorescence dyes via electrospinning process. The obtained composite nanofibers exhibit considerable luminescence dissymmetry factor (glum), with the highest glum up to 10−2. White circularly polarized light-emitting diodes are further fabricated by packaging the white CPL nanofiber film on UV chip.
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This work was supported by the National Natural Science Foundation of China (51973011, 52003022).
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Li, P., Gao, X., Zhao, B. et al. Multi-color Tunable and White Circularly Polarized Luminescent Composite Nanofibers Electrospun from Chiral Helical Polymer. Adv. Fiber Mater. 4, 1632–1644 (2022). https://doi.org/10.1007/s42765-022-00196-x
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DOI: https://doi.org/10.1007/s42765-022-00196-x