作者:Kazuhiko Tanaka、Hideji Osuga、Naoki Tsujiuchi、Masashi Hisamoto、Yuichi Sakaki
DOI:10.1246/bcsj.75.551
日期:2002.3
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.
我们描述了由苯并二噻吩和萘并噻吩等正交融合杂环系统组成的 1,2-二噻吩乙烯衍生物(DTE-8-15)的合成和光学特性。化合物 8-13 在甲苯溶液中具有高荧光,其强度约为 4,4′-双(2,2-二苯基乙烯基)联苯(18)的两倍。除 14 号化合物外,8-15 号化合物的荧光量子产率是 18 号化合物的 2 倍。虽然 9 在 ITO/CuPc/NPD/9/Alq3/LiF/Al 结构的多层器件中的最大亮度较低(186 cd m-2),但通过在 18 和 9,10-双(2-联苯基)-2-(叔丁基)蒽(19)等主发射体中掺杂 9,亮度会显著提高。在 19 层中掺入 8(5%)的电致发光(EL)器件在 14 V 的驱动电压下发出蓝色光,最大亮度为 30000 cd m-2,在 5V 电压下的发光效率为 2.42 lm W-1。