Fluorene Co-polymers with High Efficiency Deep-Blue Electroluminescence

Santos, J.; Cook, J.H.; Al-Attar, H.A.; Monkman, A.P.; Bryce, M.R.

Abstract

Two new deep blue emitting co-polymers are synthesised and exploited in highly-efficient solution-processed polymer light-emitting diodes (PLEDs). A key molecular design feature is selective functionalisation of 9,9-diphenylfluorene to disrupt backbone π-conjugation, thereby promoting luminescence from short emissive domains (λELmax 422 and 401 nm for P1 and P2 devices, respectively). PLEDs using P1 and P2 in the hybrid architecture ITO/PEDOT:PSS/polymer/TPBi/LiF/Al show low turn-on voltages and remarkably high EQE values of ηext,max 3.3%, Lmax of 167 cd m−2 with CIExy coordinates (0.17, 0.10) for P1; and 3.9%, 274 cd m−2, CIExy (0.17, 0.07) for P2. These performances are currently among the best for PLEDs with CIEy ≤ 0.10.

Citation

Santos, J., Cook, J., Al-Attar, H., Monkman, A., & Bryce, M. (2015). Fluorene Co-polymers with High Efficiency Deep-Blue Electroluminescence. Journal of Materials Chemistry C Materials for optical and electronic devices, 3(11), 2479-2483. https://doi.org/10.1039/c4tc02766c

• Journal Article Type: Article
• Publication Date: Mar 21, 2015
• Deposit Date: Mar 6, 2015
• Publicly Available Date: Mar 9, 2015
• Journal: Journal of Materials Chemistry C Materials for optical and electronic devices
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 3
• Issue: 11
• Pages: 2479-2483
• DOI: https://doi.org/10.1039/c4tc02766c
• Public URL: https://durham-repository.worktribe.com/output/1411593