Classic Fluorophores With a Horizontal Alignment for Enhancing Light Outcoupling Efficiency (≈30%) and External Quantum Efficiency (≈7%) of Near Ultraviolet (λmax < 400 nm) OLEDs

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Written By Fluxim AG

Lee, J. H., Huang, J.-X., Chen, C.-H., Lee, Y.-T., Chan, C.-Y., Dzeng, Y.-C., Tang, P.-W., Chen, C., Adachi, C., Chiu, T.-L., Lee, J.-H., Chen, C.-T.,

Adv. Optical Mater. 2023, 2202666.

https://doi.org/10.1002/adom.202202666

Researchers have designed and synthesized a novel near-ultraviolet (NUV) fluorescent material, BB4Ph, based on the classic 1,1′:4′,1″-terphenyl fluorophore. The material exhibits high order and horizontal-dipole ratios, enabling efficient NUV organic light-emitting diodes (OLEDs). Non-doped BB4Ph OLEDs achieved external quantum efficiency (EQE) up to 5.24%, while doped BB4Ph OLEDs with 4P-Cz reached a peak EQE of 6.99%. The material's high photoluminescence quantum yield and light outcoupling efficiency make it a promising candidate for NUV OLED applications.

Fluxim AG
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