کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1441850 1509417 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Highly efficient yellow and white phosphorescent organic light-emitting diodes using a benzothiazole-liganded new iridium complex
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Highly efficient yellow and white phosphorescent organic light-emitting diodes using a benzothiazole-liganded new iridium complex
چکیده انگلیسی

We designed and synthesized a novel yellow-emitting iridium complex, bis[2-(9-ethyl-9H-carbazol-3-yl)-benzothiazole]iridium(III) acetoacetonate [(Btc)2Ir(acac)], for use in phosphorescent organic light-emitting diodes. The synthesized compound was characterized by 1H NMR and 13C NMR. Photophysical and electrochemical studies revealed photoluminescence emission at 555 nm (in solution) with a band gap energy of 2.37 eV. The phosphorescent organic light-emitting diodes based on ITO/PEDOT:PSS/α-NPD/TCTA/CBP:(Btc)2Ir(acac)(8%)/BCP/Alq3/LiF/Al exhibited a yellow emission at 562 nm with a high luminous efficiency of 35.4 cd/A, a maximum external quantum efficiency of 12.9% at 7.4 V, and a very outstanding luminance of 100,048 cd/m2. Because of its high electroluminescent performance, efficient white phosphorescent organic light-emitting devices using this new iridium complex in the structure of ITO/TAPC/DCzPPy(x%):FIrpic(14%):(Btc)2Ir(acac)(y%)/Bphen/LiF/Al were fabricated. The device, with a new iridium(III) complex doping concentration of 0.15%, exhibited a maximum luminous efficiency as high as 41.6 cd/A at 5 V, CIE coordinates of (0.34, 0.46), a maximum luminance of 25,010 cd/m2, and a maximum power efficiency of 28.9 lm/W, respectively.

Figure optionsDownload as PowerPoint slideHighlights
► A novel benzothiazole-liganded Ir(III) complex was synthesized and characterized.
► Yellow phosphorescent OLEDs were fabricated using the new iridium complex as a doping molecule.
► White phosphorescent OLEDs were also fabricated and characterized.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 162, Issues 15–16, September 2012, Pages 1421–1428
نویسندگان
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