کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399394 | 1505900 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of efficiency roll-off in blue phosphorescence OLED using double dopants emissive layer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Blue phosphorescent organic light-emitting diodes (PHOLEDs) were fabricated using double dopants FIrpic and FIr6 in emissive layer (EML) with structure of ITO/NPB (700Â Ã
)/mCP:FIrpic-8%:FIr6-x% (300Â Ã
)/TPBi (300Â Ã
)/Liq (20Â Ã
)/Al (1200Â Ã
). We optimized concentration of the second dopant FIr6 in the presence of a fixed FIrpic to observe its effect on electrical performance of PHOLED device. 24.8Â cd/A of luminous efficiency was achieved by the device with dopant ratio of 8%FIrpic:4%FIr6 in EML. Efficiency roll-off was also improved 20% compared to the PHOLED device singly dopped with FIrpic or FIr6 only. Second doping proved its effect in stabilizing charge balance in EML and enhancing energy transfer of triplet excitons between two dopants.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 160, April 2015, Pages 346-350
Journal: Journal of Luminescence - Volume 160, April 2015, Pages 346-350
نویسندگان
Seung Il Yoo, Ju An Yoon, Nam Ho Kim, Jin Wook Kim, Jin Sung Kang, Chang-Bum Moon, Woo Young Kim,