Anthracene derivatives as highly efficient deep-blue emitters with extremely low driving voltages, Von ≤2.7 V. (September 2020)

• Record Type: Journal Article
• Authors: Qiu, Fangcheng; Fang, Daqi; Bai, Junwu; Zhang, Tian; Zhu, Yanan; Miao, Jingsheng; Murtaza, Imran; Hu, Zhao; Yan, Chaoyi; Meng, Hong
• Is Part Of: Dyes and pigments. Volume 180(2020)
• Publication Date: 2020-09
• Subjects: Deep-blue -- Low driving voltages -- High efficiency -- TPDA group -- OLEDs; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2020.108458
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: In this work, we report a feasible and versatile method to synthesize bis( N 1, N 1, N 3, N 3 -tetraphenylbenzene-1, 3-diamine) (TPDA) group as a donor group for OLEDs. A series of novel tetraphenyl-diamine-phenyl end-capped anthracene derivatives, 5-(anthracene-9-yl) -N 1, N 1, N 3, N 3 -tetraphenylbenzene-1, 3-diamine (TPDAAn ), N 1, N 1, N 3, N 3 -tetraphenyl-5-(10-phenylanthracen-9-yl)benzene-1, 3-diamine (TPDAPhAn ), 5, 5'-(anthracene-9, 10-diyl)bis( N 1, N 1, N 3, N 3 -tetraphenylbenzene-1, 3-diamine) (dTPDAAn ) were synthesized through a facile route. The doped devices based on TPDAAn, TPDAPhAn and dTPDAAn exhibit high EQE up to 4.01% and deep-blue emission with CIE coordinates of (0.15, 0.05), which fully meet the requirements of European Broadcasting Union (EBU) standard blue CIE coordinates of (0.15, 0.06). The non-doped devices based on TPDAAn and TPDAPhAn also display efficient deep-blue emission with CIEy coordinates of 0.08, matching very well with the National Television System Committee (NTSC) standard blue CIEy coordinate for display applications. More importantly, the non-doped devices show extremely low driving voltages (Von ≤ 2.7 V), making them one of the lowest driving voltage devices with CIEy ≤ 0.8. Highlights: A series of TPDA end-capped anthracence derivatives, were successfully designed and synthesized through a facile route. The devices exhibit high EQE, deep-blue emission. The non-doped devices showed extremely low driving voltages of Von ≤2.7 V.