Sky-Blue Aggregation-Induced Delayed Fluorescence Luminogens with High Horizontal Dipole Orientation for Efficient Organic Light-Emitting Diodes†
Ruishan Huang
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
‡ These authors contributed equally to this work.
† Dedicated to the Special Issue of Optoelectronic Functional Materials.
Search for more papers by this authorZuguo Yang
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
‡ These authors contributed equally to this work.
† Dedicated to the Special Issue of Optoelectronic Functional Materials.
Search for more papers by this authorHao Chen
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
Search for more papers by this authorHao Liu
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
Search for more papers by this authorBen Zhong Tang
School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172 China
Search for more papers by this authorCorresponding Author
Zujin Zhao
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
E-mail: [email protected]Search for more papers by this authorRuishan Huang
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
‡ These authors contributed equally to this work.
† Dedicated to the Special Issue of Optoelectronic Functional Materials.
Search for more papers by this authorZuguo Yang
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
‡ These authors contributed equally to this work.
† Dedicated to the Special Issue of Optoelectronic Functional Materials.
Search for more papers by this authorHao Chen
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
Search for more papers by this authorHao Liu
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
Search for more papers by this authorBen Zhong Tang
School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172 China
Search for more papers by this authorCorresponding Author
Zujin Zhao
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong, 510640 China
E-mail: [email protected]Search for more papers by this authorComprehensive Summary
Efficient and stable blue luminescent organic materials are highly demanded in the field of organic light-emitting diodes (OLEDs) but still remain challenging. In this work, two new sky-blue luminescent molecules comprised of electron acceptor of benzophenone and electron donors of spiro[acridine-9,9'-fluorene] and carbazole are designed and synthesized, and their thermal stability, electrochemical behaviors, photophysical properties, carrier transport ability and electroluminescence performance are investigated. They exhibit distinct merits of aggregation-induced delayed fluorescence with high solid-state photoluminescence quantum yields, balanced bipolar carrier transport and high horizontal dipole ratios. Highly efficient OLEDs using both molecules as emitters are obtained, which radiate strong sky-blue light and provide outstanding external quantum efficiencies of up to 33.3% with small roll-offs.
Supporting Information
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Appendix S1: Supporting Information |
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