Multi-triphenylamine-functionalized dithienylbenzothiadiazoles as hole-transporting non-doped red emitters for efficient simple solution processed pure red organic light-emitting diodes

作者：Thangthong Amonrat; Prachumrak Narid; Sudyoadsuk Taweesak; Namuangruk Supawadee; Keawin Tinnagon; Jungsuttiwong Siri****; Kungwan Nawee; Promarak Vinich^*

来源：Organic Electronics, 2015, 21: 117-125.

DOI：10.1016/j.orgel.2015.03.009

• Triphenylamine
• Dithienylbenzothiadiazoles
• Hole-transporting red emitter
• Solution process
• Organic light-emitting diode

To achieve high efficiency solution processed red OLED, a series of new triphenylamine-functionalized dithienylbenzothiadiazoles, namely TB, T3TB and T4TB, as non-doped solution-processed hole-transporting red emitters were synthesized and characterized. Particularly, T3TB having five triphenylamine units substituted on the dithienylbenzothiadiazole core exhibited a good red emission with high T-g amorphous and good film-forming properties. A simple structured non-doped red OLED (ITO/PEDOT:PSS/T3TB(spin coating)/BCP/LiF-Al) with an efficiency (eta) of 6.25 cd A(-1) at 4.1 mA cm(-2) (PE = 5.17 lm W-1), a low turn-on voltage (3.0 V) and a pure red emission (lambda(EL) = 656 nm, CIE (x, y) = 0.67, 0.33) was attained.

• 出版日期2015-6