High Triplet Energy Level Achieved by Tuning the Arrangement of Building Blocks in Phosphorescent Polymer Backbones for Furnishing High Electroluminescent Performances in Both Blue and White Organic Light-Emitting Devices

2017 ◽  
Vol 9 (19) ◽  
pp. 16360-16374 ◽  
Author(s):  
Boao Liu ◽  
Feifan Dang ◽  
Zhuanzhuan Tian ◽  
Zhao Feng ◽  
Deyuan Jin ◽  
...  
Keyword(s):  
Energy Level ◽  
Building Blocks ◽  
Triplet Energy ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Highly Efficient and Unusual Structure White Organic Light-Emitting Devices Based on Phosphorescence Sensitized 5,6,11,12-Tetraphenylnaphthacene

2007 ◽  
Vol 364-366 ◽  
pp. 1095-1099
Author(s):  
Wen Long Jiang ◽  
Yu Duan ◽  
Hui Ying Li ◽  
De Chang Li ◽  
Gui Ying Ding
Keyword(s):  
Power Efficiency ◽  
Fluorescent Dye ◽  
Triplet Energy ◽  
Device Structure ◽  
Unusual Structure ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Organic Light Emitting Devices

Highly efficient and unusual structures white organic light-emitting devices were fabricated based on phosphorescence sensitized 5,6,11,12-tetraphenylnaphthacene. The device structure was ITO / NPB (30 nm)/CBP: 10% DPVBi (10 nm)/CBP (5 nm) /CBP:x% Ir(ppy)3 : y% rubrene (20 nm)/ CBP (5 nm)/ CBP: 10% DPVBi (10 nm)/BCP (10 nm)/ Alq3 (30 nm)/LiF(0.5 nm)/Al, where NPB is N,N '-bis- (1-naphthyl)- N,N ' –diphenyl -1, 1 '- biphenyl-4,4 '-diamine as a hole transporting layer, CBP 4,4,N,N’-dicarbazolebiphenyl as host,DPVBi is 4,4 '-bis(2,2 -diphenyl vinyl)-1,1 '-biphenyl as blue fluorescent dye，Rubrene is 5,6,11,12,-tetraphenylnaphthacene as fluorescent dye,Ir(ppy)3 is factris (2-phenylpyridine) iridium as phosphorescent sensitizer .BCP is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline as hole-blocking layer, and Alq3 is tris(8- hydroxyquinoline) aluminum as an electron-transporting layer. In this device, phosphorescent emissive layer was sandwiched between two blue fluorescent doped ones. This architecture allowed for resonant energy transfer from both the host singlet and triplet energy levels that minimized exchange energy losses. Thus, a WOLED with a maximum luminous efficiency of 11.63 cd/A, a maximum power efficiency of 7.37 lm/W, a maximum luminance of 31770cd/m2, and Commission Internationale de L’Eclairage coordinates of (0.34.0.36) was achieved.

An alternative way to use the triplet energy of fluorescent dyes in organic light-emitting devices via an external iodide

2012 ◽  
Vol 13 (1) ◽  
pp. 195-198 ◽  
Author(s):  
Xing Xing ◽  
Taiju Tsuboi ◽  
Yosuke Nakai ◽  
Fei Wang ◽  
Boyuan Qi ◽  
...  
Keyword(s):  
Fluorescent Dyes ◽  
Triplet Energy ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices
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