Synthesis,Aggregation-Induced Emission,and Electroluminescence of Dibenzothiophene- and Dibenzofuran-Containing Tetraarylethenes |
| |
| Authors: | Ni Xie Yang Liu Rongrong Hu Nelson L C Leung Mathieu Arseneault Ben Zhong Tang |
| |
| Affiliation: | 1. Department of Chemistry, Institute for Advanced Study, Division of Biomedical Engineering, Division of Life Science, State Key Laboratory of Molecular Neuroscience and Institute of Molecular Functional Materials, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong (S.A.R. China);2. State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (P.?R. China) |
| |
| Abstract: | Dibenzothiophene- and dibenzofuran-functionalized ethanes were synthesized by the McMurry coupling reaction. The luminogens are faintly emissive when molecularly dissolved in good solvents, but emit intensively when aggregated as nanoparticles in poor solvents or fabricated as solid thin films, demonstrating the phenomenon of aggregation-induced emission (AIE). Their organic light-emitting diode (OLED) applications were explored, utilizing the AIE effect. Electroluminescence devices with the configuration of indium tin oxide (ITO)/N,N′-di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB; 60 nm)/dye (20 nm)/1,3,5-tri(1-phenyl-1H-benzod]imidazol-2-yl)phenyl (TPBi; 10 nm)/tris(8-hydroxyquinoline)aluminum (Alq3; 30 nm)/LiF (1 nm)/Al (100 nm) were fabricated. The OLED device emits at 510 nm with a maximum luminescence and external quantum efficiency of 104 cd/m2 and 2.1 %, respectively. The OLED behavior of the E/Z isomers was also studied. |
| |
| Keywords: | aggregation electrochemistry isomers luminescence thin films |
|
|
