Easily available, low-cost 9,9′-bianthracene derivatives as efficient blue hosts and deep-blue emitters in OLEDs

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

10 Scopus Citations
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Author(s)

  • Zhanfeng Li
  • Guoyue Gan
  • Zhitian Ling
  • Kunping Guo
  • Changfeng Si
  • And 4 others
  • Xiang Lv
  • Hua Wang
  • Bin Wei
  • Yuying Hao

Detail(s)

Original languageEnglish
Pages (from-to)24-31
Journal / PublicationOrganic Electronics: physics, materials, applications
Volume66
Online published11 Dec 2018
Publication statusPublished - Mar 2019

Abstract

A series of alkyl substituted 9,9′-bianthracene derivatives (BAs) with easy availability and low cost have been applied as deep-blue emitters and blue host materials in fluorescent organic light-emitting diodes (OLEDs). The nearly perpendicular geometry configuration of 9,9′-bianthracene and the additional alkyl units with large steric hindrance in methyl substituted MBA and tert-butyl substituted TBBA would reduce the aggregation formation emitting at longer wavelength by intramolecular and intermolecular interaction, which endows both of the compounds with good thermal properties, and film-forming abilities as well as excellent electroluminescence performance. Nondoped pure deep-blue OLED using TBBA as the emitter showed good performance with EQE of 3.20% and high color purity with CIE (0.15, 0.06), which matched the EBU standard blue very well. Furthermore, these BAs worked as excellent host materials for p-bis(p-N,N-diphenyl-aminostyryl)benzene (DSAph) dopant to get high-performance OLEDs with low turn-on voltages and high efficiencies, especially for MBA bearing two methyl substituents at 3- and 3′-positions of the 9,9′-bianthracene as the fluorescent host with a low turn-on voltage of 3.0 V, a high current efficiency of 16.54 cd/A and a high EQE of 9.47% with unobservable efficiency roll-off. Particularly, EQE can be maintained over 9.20% with very little variation of 0.54% in the range of luminance value of 1.54–13800 cd/m2 for the MBA-based device. The improved EQEs are due to the enhanced occurrence of singlet excitons in BAs-based devices.

Research Area(s)

  • 9,9′-bianthracene, Blue host, Deep-blue emitters, Fluorescent OLED

Citation Format(s)

Easily available, low-cost 9,9′-bianthracene derivatives as efficient blue hosts and deep-blue emitters in OLEDs. / Li, Zhanfeng; Gan, Guoyue; Ling, Zhitian; Guo, Kunping; Si, Changfeng; Lv, Xiang; Wang, Hua; Wei, Bin; Hao, Yuying.

In: Organic Electronics: physics, materials, applications, Vol. 66, 03.2019, p. 24-31.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review