کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1443543 | 1509472 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficient electroluminescent tertiary europium(III) β-diketonate complex with functional 2,2â²-bipyridine ligand
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A new red electroluminescent complex (2Fphen-bpy)Eu(DBM)3(2Fphen-bpy: 4-(2,4-difluorophenylene)-2,2â²-bipyridine; DBM: dibenzoylmethanate) was designed and synthesized. X-ray single crystal structural analysis shows that the dihedral angles involving the difluorophenylene moiety and two pyridine rings of the 2,2â²-bipyridine unit in (2Fphen-bpy)Eu(DBM)3 are 42° and 51.6°, indicant of non-conjugation between the two segments. The europium complex was incorporated into the doped electroluminescent device: ITO/TPD(40 nm)/(2Fphen-bpy)Eu(DBM)3:CBP(30 nm, 3%)/BCP(20 nm)/Alq3(30 nm)/LiF(1 nm)/Al(100 nm). At the brightness of 100 cd/m2, the current and power efficiency are about 2.53 cd/A and 0.79 lm/W, respectively. In comparison with the inefficient control device using (2,2â²-bipyridine)Eu(DBM)3 as the red emitter in the same configuration, the introduction of difluorophenylene moiety into the Eu(III) complex could possibly account for the improved performance of the title compound.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 157, Issues 4â5, March 2007, Pages 165-169
Journal: Synthetic Metals - Volume 157, Issues 4â5, March 2007, Pages 165-169
نویسندگان
Yan-Yan Wang, Li-Hong Wang, Xu-Hui Zhu, Jie Ru, Wei Huang, Jun-Feng Fang, Dong-Ge Ma,