Ortho-Fused Heterocyclic Derivatives as Efficient Electroluminescent Materials
We describe the synthesis and optical properties of 1,2-dithienylethylene derivatives (DTE-8–15) consisting of ortho-fused heterocyclic systems such as benzodithiophene and naphthothiophene. The compounds 8–13 are highly fluorescent in toluene solution and their intensities are approximately two tim...
Saved in:
Published in | Bulletin of the Chemical Society of Japan Vol. 75; no. 3; pp. 551 - 557 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
TOKYO
The Chemical Society of Japan
01.03.2002
Chemical Soc Japan Chemical Society of Japan |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | We describe the synthesis and optical properties of 1,2-dithienylethylene derivatives (DTE-8–15) consisting of ortho-fused heterocyclic systems such as benzodithiophene and naphthothiophene. The compounds 8–13 are highly fluorescent in toluene solution and their intensities are approximately two times as large as 4,4′-bis(2,2-diphenylethenyl)biphenyl (18). The fluorescence quantum yields of compounds 8–15, except for 14, are 2 times as high as that of 18. Although a maximum luminance of 9 in a multilayer device of structure ITO/CuPc/NPD/9/Alq3/LiF/Al is low (186 cd m-2), the brightness is significantly improved by doping the host emitters such as 18 and 9,10-bis(2-biphenylyl)-2-(t-butyl)anthracene (19) with 9. The electroluminescent (EL) device doped with 8 (5%) in the layer of 19 exhibits blue emission with a maximum luminance of 30000 cd m-2 at a driving voltage of 14 V and a luminous efficiency of 2.42 lm W-1 at 5V. |
---|---|
ISSN: | 0009-2673 1348-0634 |
DOI: | 10.1246/bcsj.75.551 |