Triptycene-derived thermally activated delayed fluorescence emitters with combined through-bond and through-space charge transfers - Details

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Abstract：

Thermally　activated　delayed　fluorescence　(TADF)　materials　with　through-space　charge　transfer　(TSCT)　have　recently　attracted　extensive　attention.　However,　how　to　rationally　design　high-performance　TSCT-TADF　emitters　with　small　ΔEST,　high　photoluminescence　quantum　yields　(PLQYs)　and　high　stability　remains　challenging.　Herein,　two　triptycene-derived　TADF　molecules　bearing　ortho-donor　(D)-acceptor　(A)　conformations　are　designed　and　characterized.　These　emitters　exhibit　unique　V-shaped　face-to-face　D-A　alignments　with　significant　intramolecular　D-A　interactions,　which　mediate　TSCT　between　the　D　and　A　moieties　in　addition　to　the　through-bond　charge　transfer　(TBCT)　and　facilitate　realizing　small　ΔEST　and　high　efficiencies.　Meanwhile,　the　rigid　3D　triptycene　scaffold　endows　the　emitters　with　excellent　thermal　stability　and　high　film-formation　quality.　These　TADF　emitters　exhibit　small　ΔEST　of　6.7　and　10.8　meV　and　high　photoluminescence　quantum　yields　of　0.80　and　0.40　in　doped　films,　respectively.　The　doped　OLEDs　employing　these　emitters　achieve　high　external　quantum　efficiencies　up　to　20.5%.　©　2022　Elsevier　Ltd

Keyword：

Charge transfer Efficiency Fluorescence Photoluminescence Quantum efficiency Quantum yield

Community：

[ 1 ] [Huang, Yangyang]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 2 ] [Huang, Yangyang]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 3 ] [Huang, Yangyang]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
[ 4 ] [Zhang, Dong-Hai]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 5 ] [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
[ 6 ] [Zhang, Dong-Hai]University of Chinese Academy of Sciences, China
[ 7 ] [Tao, Xiao-Dong]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 8 ] [Tao, Xiao-Dong]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 ] [Tao, Xiao-Dong]University of Chinese Academy of Sciences, China
[ 10 ] [Wei, Zhuangzhuang]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 11 ] [Wei, Zhuangzhuang]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
[ 12 ] [Wei, Zhuangzhuang]College of Chemistry and Materials Science, Fujian Normal University, Fujian Province, Fuzhou City; 350007, China
[ 13 ] [Jiang, Shanshan]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 14 ] [Jiang, Shanshan]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]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, 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 ] [Meng, Lingyi]College of Chemistry and Materials Science, Fujian Normal University, Fujian Province, Fuzhou City; 350007, China
[ 18 ] [Yang, Ming-Xue]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 19 ] [Yang, Ming-Xue]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
[ 20 ] [Yang, Ming-Xue]University of Chinese Academy of Sciences, China
[ 21 ] [Chen, Xu-Lin]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 22 ] [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
[ 23 ] [Chen, Xu-Lin]University of Chinese Academy of Sciences, China
[ 24 ] [Lu, Can-Zhong]College of Chemistry, Fuzhou University, Fujian, Fuzhou; 350108, China
[ 25 ] [Lu, Can-Zhong]CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, Fuzhou; 350002, China
[ 26 ] [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
[ 27 ] [Lu, Can-Zhong]University of Chinese Academy of Sciences, China

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Dyes and Pigments

ISSN： 0143-7208

Year： 2022

Volume： 204

4 . 5

JCR@2022

4 . 1 0 0

JCR@2023

ESI HC Threshold：74

JCR Journal Grade：1

CAS Journal Grade：1

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WoS CC Cited Count：

SCOPUS Cited Count： 12

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 1

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