TY - JOUR
T1 - A bulky pyridinylfluorene-fuctionalizing approach to synthesize diarylfluorene-based bipolar host materials for efficient red, green, blue and white electrophosphorescent devices
AU - Zhao, Xiang Hua
AU - Zhang, Zhen Song
AU - Qian, Yan
AU - Yi, Ming Dong
AU - Xie, Ling Hai
AU - Hu, Chao Peng
AU - Xie, Guo Hua
AU - Xu, Hui
AU - Han, Chun Miao
AU - Zhao, Yi
AU - Huang, Wei
PY - 2013/6/7
Y1 - 2013/6/7
N2 - By incorporating electron-transporting pyridine and hole-transporting fluorene moieties into a nonplanar 3-dimensional molecule, via the sp 3-hybridized carbon linkage by Friedel-Crafts reaction, three novel donor-acceptor (p-n) bipolar host materials 9-(pyridin-2-yl)-3-(9-(pyridin-2-yl) -fluoren-9-yl)-carbazole (CzPy-PyFM), 3,6-bis(9-(pyridine-2-yl)-fluoren-9-yl)-9- (pyridin-2-yl)-carbazole (CzPy-DPyFM) and 5,5′′-bis(9-(pyridin-2-yl) -fluoren-9-yl-)-2,2′:5′,2′′-terthiophene (T 3DPyFM) have been synthesized successfully. These pyridinylfluorene end-capped materials with large steric hindrance have been applied as efficient universal hosts for blue, green and red PhOLEDs. The blue, green, and red PhOLEDs hosted by highly thermally stable CzPy-PyFM exhibit the maximum external quantum efficiencies (EQEs) of 10.49%, 11.04%, and 6.50%, respectively. On this basis, the single-emissive-layer three-color and all-phosphor CzPy-PyFM-based white PhOLEDs have been fabricated, which acquire a maximum current efficiency of 10.4 cd A-1, a power efficiency of 10.2 lm W-1 and an EQE of 5.58%. This is the first example of the diarylfluorenes as universal hosts for full-color RGB PhOLEDs as well as white PhOLEDs.
AB - By incorporating electron-transporting pyridine and hole-transporting fluorene moieties into a nonplanar 3-dimensional molecule, via the sp 3-hybridized carbon linkage by Friedel-Crafts reaction, three novel donor-acceptor (p-n) bipolar host materials 9-(pyridin-2-yl)-3-(9-(pyridin-2-yl) -fluoren-9-yl)-carbazole (CzPy-PyFM), 3,6-bis(9-(pyridine-2-yl)-fluoren-9-yl)-9- (pyridin-2-yl)-carbazole (CzPy-DPyFM) and 5,5′′-bis(9-(pyridin-2-yl) -fluoren-9-yl-)-2,2′:5′,2′′-terthiophene (T 3DPyFM) have been synthesized successfully. These pyridinylfluorene end-capped materials with large steric hindrance have been applied as efficient universal hosts for blue, green and red PhOLEDs. The blue, green, and red PhOLEDs hosted by highly thermally stable CzPy-PyFM exhibit the maximum external quantum efficiencies (EQEs) of 10.49%, 11.04%, and 6.50%, respectively. On this basis, the single-emissive-layer three-color and all-phosphor CzPy-PyFM-based white PhOLEDs have been fabricated, which acquire a maximum current efficiency of 10.4 cd A-1, a power efficiency of 10.2 lm W-1 and an EQE of 5.58%. This is the first example of the diarylfluorenes as universal hosts for full-color RGB PhOLEDs as well as white PhOLEDs.
UR - http://www.scopus.com/inward/record.url?scp=84877708473&partnerID=8YFLogxK
U2 - 10.1039/c3tc00875d
DO - 10.1039/c3tc00875d
M3 - 文章
AN - SCOPUS:84877708473
SN - 2050-7534
VL - 1
SP - 3482
EP - 3490
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 21
ER -