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author：

Wu, Shao-Jie (Wu, Shao-Jie.) [1] | Fu, Xi-Feng (Fu, Xi-Feng.) [2] | Zhang, Dong-Hai (Zhang, Dong-Hai.) [3] | Sun, Yu-Fu (Sun, Yu-Fu.) [4] | Lu, Xin (Lu, Xin.) [5] | Lin, Fu-Lin (Lin, Fu-Lin.) [6] | Meng, Lingyi (Meng, Lingyi.) [7] | Chen, Xu-Lin (Chen, Xu-Lin.) [8] | Lu, Can-Zhong (Lu, Can-Zhong.) [9]

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EI

Abstract：

Simultaneously　achieving　a　high　photoluminescence　quantum　yield　(PLQY),　ultrashort　exciton　lifetime,　and　suppressed　concentration　quenching　in　thermally　activated　delayed　fluorescence　(TADF)　materials　is　desirable　yet　challenging.　Here,　a　novel　acceptor–donor–acceptor　type　TADF　emitter,　namely,　2BO-sQA,　wherein　two　oxygen-bridged　triarylboron　(BO)　acceptors　are　arranged　with　cofacial　alignment　and　positioned　nearly　orthogonal　to　the　rigid　dispirofluorene-quinolinoacridine　(sQA)　donor　is　reported.　This　molecular　design　enables　the　compound　to　achieve　highly　efficient　(PLQYs　up　to　99%)　and　short-lived　(nanosecond-scale)　blue　TADF　with　effectively　suppressed　concentration　quenching　in　films.　Consequently,　the　doped　organic　light-emitting　diodes　(OLEDs)　base　on　2BO-sQA　achieve　exceptional　electroluminescence　performance　across　a　broad　range　of　doping　concentrations,　maintaining　maximum　external　quantum　efficiencies　(EQEs)　at　over　30%　for　doping　concentrations　ranging　from　10　to　70　wt%.　Remarkably,　the　nondoped　blue　OLED　achieves　a　record-high　maximum　EQE　of　26.6%　with　a　small　efficiency　roll-off　of　14.0%　at　1000　candelas　per　square　meter.　By　using　2BO-sQA　as　the　sensitizer　for　the　multiresonance　TADF　emitter　ν-DABNA,　TADF-sensitized　fluorescence　OLEDs　achieve　high-efficiency　deep-blue　emission.　These　results　demonstrate　the　feasibility　of　this　molecular　design　in　developing　TADF　emitters　with　high　efficiency,　ultrashort　exciton　lifetime,　and　minimal　concentration　quenching.　©　2024　Wiley-VCH　GmbH.

Keyword：

Electroluminescence Excitons Fluorescence Organic light emitting diodes (OLED) Quantum efficiency Quenching Semiconductor doping Supercomputers

Community：

  • [ 1 ] [Wu, Shao-Jie]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 2 ] [Wu, Shao-Jie]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 3 ] [Wu, Shao-Jie]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
  • [ 4 ] [Fu, Xi-Feng]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 5 ] [Fu, Xi-Feng]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 6 ] [Fu, Xi-Feng]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
  • [ 7 ] [Zhang, Dong-Hai]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 8 ] [Zhang, Dong-Hai]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 9 ] [Sun, Yu-Fu]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 10 ] [Sun, Yu-Fu]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 11 ] [Lu, Xin]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 12 ] [Lu, Xin]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 13 ] [Lin, Fu-Lin]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 14 ] [Lin, Fu-Lin]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 15 ] [Meng, Lingyi]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 16 ] [Meng, Lingyi]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 17 ] [Chen, Xu-Lin]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 18 ] [Chen, Xu-Lin]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 19 ] [Chen, Xu-Lin]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
  • [ 20 ] [Chen, Xu-Lin]Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou; 350108, China
  • [ 21 ] [Lu, Can-Zhong]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
  • [ 22 ] [Lu, Can-Zhong]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Haixi Institutes, Chinese Academy of Sciences, Fujian, Xiamen; 361021, China
  • [ 23 ] [Lu, Can-Zhong]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
  • [ 24 ] [Lu, Can-Zhong]Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou; 350108, China

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Advanced Materials

ISSN： 0935-9648

Year： 2024

Issue： 26

Volume： 36

2 7 . 4 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 1

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