کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5403390 | 1392758 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and green electrophosphorescence of a novel cyclometalated iridium complex in polymer light-emitting diodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and green electrophosphorescence of a novel cyclometalated iridium complex in polymer light-emitting diodes Synthesis and green electrophosphorescence of a novel cyclometalated iridium complex in polymer light-emitting diodes](/preview/png/5403390.png)
چکیده انگلیسی
In this paper, we synthesized a new complex bis(dibenzo[f,h]quinolinato-N,C2â²) iridium(III) acetylactonate ((DBQ)2Ir(acac)) having a longer conjugate system than bis(2-phenylpyridinato-N,C2â²) iridium(III) acetylacetonate ((PPY)2Ir(acac)). Interestingly, (DBQ)2Ir(acac) emits at the same wavelength as (photoluminescence of 530Â nm) (PPY)2Ir(acac). A high-efficiency electrophosphorescent polymer light-emitting diodes was constructed by using (DBQ)2Ir(acac) as the dopant, and a blend of poly(vinylcarbazole) (PVK) with 2-tert-butylphenyl-5-biphenyl-1,3,4-oxadiazol (PBD) as the host material. The electroluminescence efficiency of 9.5Â cd/A is reported for the device doped with 3Â wt% of (DBQ)2Ir(acac). In this device, the emission from the PVK or PBD host was effectively inhibited with the using (DBQ)2Ir(acac) . Emission from the dopant molecules in such devices involve localization of the injected electron and hole on the metal-organic center. This can occur by a variety of mechanisms, including Förster and Dexter energy transfer from the host transport material to the dopant, and direct trapping of both electrons and holes on the metal-organic center.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 126, Issue 2, October 2007, Pages 687-694
Journal: Journal of Luminescence - Volume 126, Issue 2, October 2007, Pages 687-694
نویسندگان
Li-Lan Wu, Sung-Hao Tsai, Tzung-Fang Guo, Cheng-Hsien Yang, I-Wen Sun,