Narrow-Band Emission of Asymmetric 1,3-Substituted Pyrene-Based Deep-Blue Emitters and Application in OLEDs

Liu, Wei; Jin, Pengcheng; Zhang, Sheng; Wang, Xiaohui; Xie, Zhixin; Xiao, Ye; Hu, Jian Yong; Redshaw, Carl; Feng, Xing

Abstract

High-efficiency organic blue light-emitting materials with narrow-band emission are fundamental components for constructing high color purity and high resolution in high-performance organic light-emitting diode (OLED) devices. Herein, new pyrene-based blue emitters (8–10) with narrow-band emission are synthesized by asymmetrically introducing biphenyl and triphenylamine units at the 1- and 3-positions of pyrene, respectively. Due to the steric effect and through-space conjugation, the synergistic effects of both groups not only boost these emitters 8–10 (CIEy < 0.11) with aggregation-induced emission (AIE) characteristics and high fluorescence quantum yield (>0.68), but also endow narrow full width at half maxima (FWHM) emission (≤36 nm) in the crystallized state (FWHM ≤ 55 nm in the film state). The EL spectra of pyrene-based 8–10 in nondoped OLEDs exhibit blue emission with a maximum emission (λmax em) in the range of 448–453 nm (CIEy ≤ 0.12). The compounds 8–10 in doped-OLEDs show a blue emission with a λmax em in the range of 443–445 nm and CIEy ≤ 0.08, with FWHM emission of 57–61 nm. The compound 10-based doped OLED displays an impressive EL performance with a maximum brightness of 9756 cd m−2 and a maximum external quantum efficiency of 2.58%.

Citation

Liu, W., Jin, P., Zhang, S., Wang, X., Xie, Z., Xiao, Y., Hu, J. Y., Redshaw, C., & Feng, X. (online). Narrow-Band Emission of Asymmetric 1,3-Substituted Pyrene-Based Deep-Blue Emitters and Application in OLEDs. Advanced Optical Materials, https://doi.org/10.1002/adom.202402090

• Journal Article Type: Article
• Acceptance Date: Sep 30, 2024
• Online Publication Date: Oct 24, 2024
• Deposit Date: Nov 15, 2024
• Publicly Available Date: Oct 25, 2025
• Journal: Advanced Optical Materials
• Print ISSN: 2195-1071
• Electronic ISSN: 2195-1071
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1002/adom.202402090
• Keywords: OLED; Aggregation-induced emission; Deep-blue emitters; Narrow-band emission; Pyrene
• Public URL: https://hull-repository.worktribe.com/output/4908198