Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers
Two sets of conjugated polymers with anthraquinone groups as pendant acceptors were designed and synthesized. The acceptor is tethered to an diphenylamine group via a phenylene bridge, constructing a thermally activated delayed fluorescence (TADF) unit, which is embedded into the polymer backbone th...
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Frontiers Media S.A.
2020-04-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.00332/full |
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| author | Hongmei Zhan Yanjie Wang Kuofei Li Yuannan Chen Xiaohu Yi Keyan Bai Guohua Xie Guohua Xie Yanxiang Cheng |
| author_facet | Hongmei Zhan Yanjie Wang Kuofei Li Yuannan Chen Xiaohu Yi Keyan Bai Guohua Xie Guohua Xie Yanxiang Cheng |
| author_sort | Hongmei Zhan |
| collection | DOAJ |
| description | Two sets of conjugated polymers with anthraquinone groups as pendant acceptors were designed and synthesized. The acceptor is tethered to an diphenylamine group via a phenylene bridge, constructing a thermally activated delayed fluorescence (TADF) unit, which is embedded into the polymer backbone through its donor fragment, while the backbone is composed of dibenzothiophene-S, S-dioxide and 2, 7-fluorene or 2, 7-carbazole groups. The polymers show distinct TADF characteristics, confirmed by transient photoluminescence spectra and theoretical calculations. The carbazole-based polymers exhibit shorter delay lifetimes and lower energy emission relative to the fluorene-based polymers. The non-doped organic light-emitting diodes fabricated via solution processing approach produce efficient red emissions with the wavelengths of 625–646 nm. The carbazole containing polymer with 2% molar content of the TADF unit exhibits the best maximum external quantum efficiency of 13.6% and saturated red electroluminescence with the Commission Internationale de l'Eclairage coordinates of (0.62, 0.37). |
| first_indexed | 2024-12-23T20:57:37Z |
| format | Article |
| id | doaj.art-16e72b53fdb34ca6aef19b9d6830f404 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-23T20:57:37Z |
| publishDate | 2020-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-16e72b53fdb34ca6aef19b9d6830f4042022-12-21T17:31:28ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-04-01810.3389/fchem.2020.00332519815Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated PolymersHongmei Zhan0Yanjie Wang1Kuofei Li2Yuannan Chen3Xiaohu Yi4Keyan Bai5Guohua Xie6Guohua Xie7Yanxiang Cheng8State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaSauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan, ChinaGuangdong Provincial Key Laboratory of Luminescence From Molecular Aggregates (South China University of Technology), Guangzhou, ChinaState Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, ChinaTwo sets of conjugated polymers with anthraquinone groups as pendant acceptors were designed and synthesized. The acceptor is tethered to an diphenylamine group via a phenylene bridge, constructing a thermally activated delayed fluorescence (TADF) unit, which is embedded into the polymer backbone through its donor fragment, while the backbone is composed of dibenzothiophene-S, S-dioxide and 2, 7-fluorene or 2, 7-carbazole groups. The polymers show distinct TADF characteristics, confirmed by transient photoluminescence spectra and theoretical calculations. The carbazole-based polymers exhibit shorter delay lifetimes and lower energy emission relative to the fluorene-based polymers. The non-doped organic light-emitting diodes fabricated via solution processing approach produce efficient red emissions with the wavelengths of 625–646 nm. The carbazole containing polymer with 2% molar content of the TADF unit exhibits the best maximum external quantum efficiency of 13.6% and saturated red electroluminescence with the Commission Internationale de l'Eclairage coordinates of (0.62, 0.37).https://www.frontiersin.org/article/10.3389/fchem.2020.00332/fullthermally activated delayed fluorescencered emissionconjugated polymersanthraquinoneelectroluminescence |
| spellingShingle | Hongmei Zhan Yanjie Wang Kuofei Li Yuannan Chen Xiaohu Yi Keyan Bai Guohua Xie Guohua Xie Yanxiang Cheng Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers Frontiers in Chemistry thermally activated delayed fluorescence red emission conjugated polymers anthraquinone electroluminescence |
| title | Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers |
| title_full | Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers |
| title_fullStr | Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers |
| title_full_unstemmed | Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers |
| title_short | Saturated Red Electroluminescence From Thermally Activated Delayed Fluorescence Conjugated Polymers |
| title_sort | saturated red electroluminescence from thermally activated delayed fluorescence conjugated polymers |
| topic | thermally activated delayed fluorescence red emission conjugated polymers anthraquinone electroluminescence |
| url | https://www.frontiersin.org/article/10.3389/fchem.2020.00332/full |
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