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

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.

2021 ◽  
Author(s):  
Jian Song ◽  
Fujun Zhang ◽  
Liping Yang ◽  
Keming Chen ◽  
Asu Li ◽  
...  

We have prepared high-performance white OLEDs based on exciplex systems and blue ultra-thin FIrPic layers, exhibiting a low turn-on voltage of 2.2 V with a maximum power efficiency of 34.1 lm W−1, and the CIE coordinate (0.33,0.33) at 1000 cd m−2.


2012 ◽  
Vol 52 (1) ◽  
pp. 446-449 ◽  
Author(s):  
Man-Chung Tang ◽  
Daniel Ping-Kuen Tsang ◽  
Maggie Mei-Yee Chan ◽  
Keith Man-Chung Wong ◽  
Vivian Wing-Wah Yam

2018 ◽  
Vol 11 (2) ◽  
pp. 022101 ◽  
Author(s):  
Huishan Yang ◽  
Yaoyao Yu ◽  
Lishuang Wu ◽  
Biao Qu ◽  
Wenyan Lin ◽  
...  

2018 ◽  
Vol 39 (3) ◽  
pp. 315-321
Author(s):  
于瑶瑶 YU Yao-yao ◽  
喻 叶 YU Ye ◽  
林雯嫣 LIN Wen-yan ◽  
吴志军 WU Zhi-jun ◽  
林 薇 LIN Wei

2020 ◽  
Vol 49 (3) ◽  
pp. 228-231 ◽  
Author(s):  
Hiroki Arai ◽  
Hisahiro Sasabe ◽  
Kohei Nakao ◽  
Yuki Masuda ◽  
Junji Kido

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