TY - JOUR
T1 - Efficient Deep-Blue Electrofluorescence with an External Quantum Efficiency Beyond 10%
AU - Wang, Shuanglong
AU - Qiao, Mengya
AU - Ye, Zhonghua
AU - Dou, Dehai
AU - Chen, Minyu
AU - Peng, Yan
AU - Shi, Ying
AU - Yang, Xuyong
AU - Cui, Lei
AU - Li, Jiuyan
AU - Li, Chunju
AU - Wei, Bin
AU - Wong, Wai Yeung
N1 - Funding Information:
This work was financially supported by the Project of the National Science Foundation of China (grant Nos. 51725505 , 61775130 , and 21772118 ), “973” program ( 2015CB655005 ), the Science and Technology Committee of Shanghai ( 15590500500 ), and the Shanghai “Shuguang Program.” W.-Y.W. thanks the Areas of Excellence Scheme of the University Grants Committee of HKSAR ( AoE/P-03/08 ), the Hong Kong Polytechnic University ( 1-ZE1C ), and the Endowment Fund from Ms. Clarea Au ( 847S ) for financial support.
Publisher Copyright:
© 2018 The Authors
PY - 2018/11/30
Y1 - 2018/11/30
N2 - The design of blue fluorescent materials combining both deep-blue emission (CIEy<0.06)and high-efficiency climbing over the typically limited exciton production efficiency of 25% is a challenge for organic light-emitting diodes (OLEDs). In this work, we have synthesized two blue luminogens, trans-9,10-bis(2-butoxyphenyl)anthracene (BBPA)and trans-9,10-bis (2,4-dimethoxyphenyl)anthracene with high photoluminescence quantum yields (PLQYs)of 89.5% and 87.0%, respectively. Intriguingly, we have proposed a strategy to avoid aggregation-caused quenching, which can effectively reduce the undesirable excimeric emission by introducing two host matrices with twisted molecular structure, 9,10-di(naphth-2-yl)anthracene and 10,10′-bis-(4-fluorophenyl)-3,3′-dimethyl-9,9′-bianthracene (MBAn-(4)-F), in the BBPA emission layer. The device containing the EML of BBPA-doped MBAn-(4)-F exhibited a high external quantum efficiency of 10.27% for deep-blue emission with the Commission International de L'Eclairage CIE coordinates of (0.15, 0.05)via the steric effect. Importantly, this represents an advance in deep-blue-emitting fluorescent OLED architectures and materials that meet the requirements of high-definition display.
AB - The design of blue fluorescent materials combining both deep-blue emission (CIEy<0.06)and high-efficiency climbing over the typically limited exciton production efficiency of 25% is a challenge for organic light-emitting diodes (OLEDs). In this work, we have synthesized two blue luminogens, trans-9,10-bis(2-butoxyphenyl)anthracene (BBPA)and trans-9,10-bis (2,4-dimethoxyphenyl)anthracene with high photoluminescence quantum yields (PLQYs)of 89.5% and 87.0%, respectively. Intriguingly, we have proposed a strategy to avoid aggregation-caused quenching, which can effectively reduce the undesirable excimeric emission by introducing two host matrices with twisted molecular structure, 9,10-di(naphth-2-yl)anthracene and 10,10′-bis-(4-fluorophenyl)-3,3′-dimethyl-9,9′-bianthracene (MBAn-(4)-F), in the BBPA emission layer. The device containing the EML of BBPA-doped MBAn-(4)-F exhibited a high external quantum efficiency of 10.27% for deep-blue emission with the Commission International de L'Eclairage CIE coordinates of (0.15, 0.05)via the steric effect. Importantly, this represents an advance in deep-blue-emitting fluorescent OLED architectures and materials that meet the requirements of high-definition display.
KW - Materials Science
KW - Optical Materials
KW - Polymers
UR - http://www.scopus.com/inward/record.url?scp=85062457559&partnerID=8YFLogxK
U2 - 10.1016/j.isci.2018.10.026
DO - 10.1016/j.isci.2018.10.026
M3 - Journal article
AN - SCOPUS:85062457559
SN - 2589-0042
VL - 9
SP - 532
EP - 541
JO - iScience
JF - iScience
ER -