TY - JOUR
T1 - Fluorenone-based thermally activated delayed fluorescence materials for orange-red emission
AU - Yu, You Jun
AU - Tang, Xun
AU - Ge, Hui Ting
AU - Yuan, Yi
AU - Jiang, Zuo Quan
AU - Liao, Liang Sheng
N1 - Funding Information:
The authors acknowledge financial support from the National Natural Science Foundation of China (Grant No. 61575136 , 21572152 and 51873139 ) and the National Key R&D Program of China (Grant No. 2016YFB0400700 ). This project is also funded by the Collaborative Innovation Center of Suzhou Nano Science and Technology ( Nano-CIC ), by the Priority Academic Program Development of Jiangsu Higher Education Institutions , by the “111” Project of the State Administration of Foreign Experts Affairs of China , and by the Yunnan Provincial Research Funds on College-Enterprise Collaboration (NO. 2015IB016 ).
Funding Information:
The authors acknowledge financial support from the National Natural Science Foundation of China (Grant No. 61575136, 21572152 and 51873139) and the National Key R&D Program of China (Grant No. 2016YFB0400700). This project is also funded by the Collaborative Innovation Center of Suzhou Nano Science and Technology (Nano-CIC), by the Priority Academic Program Development of Jiangsu Higher Education Institutions, by the “111” Project of the State Administration of Foreign Experts Affairs of China, and by the Yunnan Provincial Research Funds on College-Enterprise Collaboration (NO. 2015IB016).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/10
Y1 - 2019/10
N2 - Herein, two orange-red emitters, 3,6-bis(9,9-dimethylacridin-10(9H)-yl)-9H-fluoren-9-one (DMAC-FO) and 3,6-di(10H-SP[acridine-9,9′-fluoren]-10-yl)-9H-fluoren-9-one (SPAC-FO), based on fluorenone have been designed and synthesized. As compared to the widely reported benzophenone acceptor, fluorenone has deeper lowest unoccupied molecular orbital (LUMO) because of its more conjugated skeleton and thus it can red-shift the emission maximum. The molecular simulation exhibits both emitters has separated highest occupied molecular orbitals (HOMOs) (@donors) and LUMOs (@acceptor), indicating they could act as thermally activated delayed fluorescence (TADF) materials which are further confirmed by the transient spectra. Consequently, external quantum efficiencies (EQEs) of 10.0% for DMAC-FO and 14.2% for SPAC-FO are achieved in the organic light-emitting diodes (OLEDs).
AB - Herein, two orange-red emitters, 3,6-bis(9,9-dimethylacridin-10(9H)-yl)-9H-fluoren-9-one (DMAC-FO) and 3,6-di(10H-SP[acridine-9,9′-fluoren]-10-yl)-9H-fluoren-9-one (SPAC-FO), based on fluorenone have been designed and synthesized. As compared to the widely reported benzophenone acceptor, fluorenone has deeper lowest unoccupied molecular orbital (LUMO) because of its more conjugated skeleton and thus it can red-shift the emission maximum. The molecular simulation exhibits both emitters has separated highest occupied molecular orbitals (HOMOs) (@donors) and LUMOs (@acceptor), indicating they could act as thermally activated delayed fluorescence (TADF) materials which are further confirmed by the transient spectra. Consequently, external quantum efficiencies (EQEs) of 10.0% for DMAC-FO and 14.2% for SPAC-FO are achieved in the organic light-emitting diodes (OLEDs).
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U2 - 10.1016/j.orgel.2019.06.008
DO - 10.1016/j.orgel.2019.06.008
M3 - Article
AN - SCOPUS:85067797626
SN - 1566-1199
VL - 73
SP - 240
EP - 246
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
ER -