کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399266 | 1505892 | 2015 | 22 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Efficient single light-emitting layer pure blue phosphorescent organic light-emitting devices with wide gap host and matched interlayer
ترجمه فارسی عنوان
لایه ی تک لایت یک لایه ی کارآمد یک دستگاه نوردهی آلی فسفرسد آبی خالص با میزبان گسترده ای و هم پوشانی
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کلمات کلیدی
الکترولیومینسانس، پیچیده ایریید، سطح انرژی، انرژی سه گانه،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
In this work, we report the highly efficient pure blue electroluminescent (EL) device based on bis[(3,5-difluoro-4-cyanophenyl)pyridine]picolinate iridium(III) (FCNIrpic) doped 9-(4-tert-Butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole (CzSi) film. The matched energy levels of FCNIrpic and CzSi are helpful in facilitating the trapping of carriers, while the high triplet energy of CzSi can well avoid the undesired reverse energy transfer. More importantly, the injection of holes was further accelerated by inserting 5Â nm 4,4â²,4â³-Tri(9-carbazoyl)triphenylamine (TcTa) film between hole transport layer and lighting-emitting layer (EML) as interlayer. Consequently, EL performances were significantly enhanced attributed to wider recombination zone and better balance of holes and electrons. Interestingly, single-EML device displayed higher performances than those of double-EMLs device. Finally, pure blue EL device with the structure of ITO/MoO3 (3Â nm)/TAPC (40Â nm)/TcTa (5Â nm)/FCNIrpic (20%): CzSi (30Â nm)/TmPyPB (40Â nm)/LiF (1Â nm)/Al (100Â nm) realized the maximum brightness, current efficiency, power efficiency and external quantum efficiency up to 12,505Â cd/m2, 36.20Â cd/A, 28.42Â lm/W and 16.9%, respectively. Even at the high brightness of 1000Â cd/m2, current efficiency and external quantum efficiency up to 17.40Â cd/A and 8.1%, respectively, can be retained by the same device.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 168, December 2015, Pages 38-42
Journal: Journal of Luminescence - Volume 168, December 2015, Pages 38-42
نویسندگان
Yunlong Jiang, Liang Zhou, Rongzhen Cui, Yanan Li, Xuesen Zhao, Hongjie Zhang,