Two trans-1-(9-anthryl)-2-phenylethene derivatives as blue-green emitting materials for highly bright organic light-emitting diodes application
作者:Nonglin Zhou、Xiaona Shao、Shirong Wang、Yin Xiao、Xianggao Li
DOI:10.1016/j.orgel.2017.07.054
日期:2017.11
1-(9-Anthryl)-2-phenylethene (t-APE) is a blue-green material with high fluorescence quantum yield (.f 0.44). However, it is easily crystallized. Herein, Two asymmetric blue-green emitting materials based on t-APE, (E)-9-(4-(2-(anthracen-9-yl) vinyl) phenyl)-10-(naphthalen-1-yl) anthracene (6) and (E)-9-(4-(2(anthracen-9-yl) vinyl) phenyl)-10-(naphthalen-2-yl) anthracene (7) were firstly designed and synthesized. The two compounds possess high thermal stability, morphological durability, and bipolar characteristics. The non-doped blue-green organic light-emitting diodes (OLEDs) using 6 and 7 as emitting layers showed emission at 495 nm, full width at half maximum of 80 nm, maximum brightness of 13,814, 10,579 cd m(-2), maximum current efficiency of 3.62, 7.16 cd A(-1), and Commission Internationale de L'Eclairage (CIE) coordinate of (0.20, 0.43), respectively. Furthermore, when employing 6 and 7 as bluegreen emitting layers and rubrene doped in tris-(8-hydroxyquinolinato) aluminum (Alq3) as the orange emitting layers to fabricate white OLEDs (WOLEDs), the WOLEDs exhibit a maximum brightness of 10,984, 14,652 cd m(-2), maximum current efficiency of 2.04, 2.70 cd A(-1), and CIE coordinate of (0.30, 0.40), (0.37, 0.47), Color Rendering Index (CRI) of 65, 60, stable EL spectra, respectively. This study demonstrates that the t-APE-type derivatives have the excellent properties for the emitting materials of OLEDs. (C) 2017 Published by Elsevier B.V.