کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1442676 988129 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High-efficiency red polymer light-emitting diodes based on optimizing blend polymer host
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
High-efficiency red polymer light-emitting diodes based on optimizing blend polymer host
چکیده انگلیسی

High efficiency stable red light-emitting diodes have been realized employing red copolymer (PFO-DHTBT15) from 9,9-dioctylfluorene (DOF) and 4,7-di(3-hexylthien-2-yl)-2,1,3-benzothiadiazole (DHTBT) blending into green copolymer (PFO-BT15) from 9,9-dioctylfluorene and 2,1,3-benzothiadiazole (BT) as a novel fluorescent emitting layer. The external quantum and luminous efficiency of device from blend film (PFO-DHTBT15:PFO-BT15 = 10:90) reached 5.2% and 3.16 cd/A at the current density of 35 mA/cm2, respectively. The corresponding Commission Internationale de l’Eclairage coordinates is (0.64, 0.36). In comparison with the devices from phenyl-substituted poly [p-phenylene vinylene] derivative (P-PPV) as host of PFO-DHTBT15, the device from PFO-DHTBT15/PFO-BT15 blend film shows higher luminous efficiency and better stability under high current density at the same blend weight ratio. The improved device performance is mainly attributed to the effective energy transfer from PFO-BT15 copolymer to PFO-DHTBT15 copolymer and better carrier confinement.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Synthetic Metals - Volume 159, Issue 12, June 2009, Pages 1234–1237
نویسندگان
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