950855-70-6Relevant academic research and scientific papers
Efficient blue organic light-emitting diodes based on triphenylimidazole substituted anthracene derivatives
Mu, Guangyuan,Zhuang, Shaoqing,Zhang, Wenzhi,Wang, Yixin,Wang, Bo,Wang, Lei,Zhu, Xunjin
, p. 9 - 18 (2015)
A series of new blue emissive materials based on the conjugates of highly fluorescent diaryl anthracene and electron-transporting triphenylimidazole moieties: 2-(4-(anthracen-9-yl)phenyl)-1,4,5-triphenyl-1H-imidazole (ACBI), 2-(4-(10-(naphthalen-1-yl)anthracen-9-yl)phenyl)-1,4,5-triphenyl-1H-imidazole (1-NaCBI), 2-(4-(10-(naphthalen-2-yl)anthracen-9-yl)phenyl)-1,4,5-triphenyl-1H-imidazole (2-NaCBI) were designed and synthesized successfully. These materials exhibit good film-forming properties and excellent thermal stabilities. Meanwhile, the decreased π-conjugation in these compounds compared with phenanthroimidazole derivatives leads to obvious hypsochromic shift. To explore the electroluminescence properties of these materials, typical three-layer organic light-emitting devices were fabricated. With respect to the three layer device 2 using 1-NaCBI as the emitting layer, its maximum current efficiency reaches 3.06 cd A-1 with Commission Internationale del'Eclairage (CIE) coordinates of (0.149, 0.092). More interestingly, sky blue doped device 5 based on 1-NaCBI achieved a maximum current efficiency of 15.53 cd A-1 and a maximum external quantum efficiency of 8.15%, high EQE has been proved to be induced by the up-conversion of a triplet excited state.
NITROGEN-CONTAINING HETEROCYCLIC DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICE USING SAME
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Page/Page column 25, (2009/01/20)
Provided are a novel nitrogen-containing heterocyclic derivative having a specific structure and an organic electroluminescence device having an organic thin film layer composed of one or a plurality of layers including at least a light emitting layer and
