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Published on: September 20, 2017
Chiral Co-Assembled Liquid Crystal Polymer Network Enabled by In-Situ Photopolymerization for High-Performance
Chunya Fu1, Dong Li1, Chao Liu1
1State Key Laboratory of Analytical Chemistry for Life Sciences, Engineering Research Center of Photoresist Materials, Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, P.R. China.
Abstract:
Circularly polarized organic light-emitting diodes (CP-OLEDs) show great promise for next-generation display technologies. However, achieving high dissymmetry factors (|gEL|) in circularly polarized electroluminescence (CP-EL) remains a significant challenge. In this study, we construct a novel chiral co-assembled cholesteric liquid crystal polymer network (ChLC-PN) as an emitting layer (EML) to enhance CP-EL via a facile in situ photopolymerization strategy. The ChLC-PN was fabricated by UV-induced polymerization (365 nm, 200 mW cm- 2, 2 min, N₂ atmosphere) of a chiral co-assembly system comprising liquid crystal monomer (LCM) and chiral inducers (R/S-Cz). Notably, the resulting (R/S-Cz)0.01-(LCP)0.99 based devices demonstrate sky-blue CP-EL with a maximum |gEL| value of 0.012. This work presents the first report of high-performance CP-OLEDs utilizing a chiral co-assembled cholesteric liquid crystal rigid polymer network, offering a promising platform for simple, stable, and scalable fabrication of future CP-OLED devices.
