Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off
Abstract Thermally activated delayed fluorescence (TADF)-sensitized fluorescence is a promising strategy to maintain the advantage of TADF materials and fluorescent materials. Nevertheless, the delayed lifetime of the TADF sensitizer is still relatively long, which causes heavy efficiency...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Georg Thieme Verlag
2021-12-01
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| Series: | Organic Materials |
| Subjects: | |
| Online Access: | http://www.thieme-connect.de/DOI/DOI?10.1055/a-1711-5768 |
| _version_ | 1818484660353630208 |
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| author | Zhiyi Li Ruifang Wang Yangyang Zeng Xiangyu Dong Guanhao Liu Xiaoxiao Hu Teng Gao Honglei Gao Yuanyuan Qin Xiuxian Gu Chun-Sing Lee Jiguang Liu Pengfei Wang Ying Wang |
| author_facet | Zhiyi Li Ruifang Wang Yangyang Zeng Xiangyu Dong Guanhao Liu Xiaoxiao Hu Teng Gao Honglei Gao Yuanyuan Qin Xiuxian Gu Chun-Sing Lee Jiguang Liu Pengfei Wang Ying Wang |
| author_sort | Zhiyi Li |
| collection | DOAJ |
| description | Abstract
Thermally activated delayed fluorescence (TADF)-sensitized fluorescence is a promising strategy to maintain the advantage of TADF materials and fluorescent materials. Nevertheless, the delayed lifetime of the TADF sensitizer is still relatively long, which causes heavy efficiency roll-off. Here we reported a valid tactic to construct fluorescent devices with low-efficiency roll-off by utilizing the TADF sensitizer with a reduced delayed lifetime. By the construction of the sensitization system, the energy transfer efficiency can reach up to 90%. The high-energy transfer efficiency and the TADFʼs short delayed lifetime result in high sensitization over 95% and the maximum external quantum efficiency of 16.2%. Meanwhile, the TADF-sensitized fluorescent devices exhibit reduced efficiency roll-off with an “onset” current density of 23 mA · cm−2. Our results provide an effective strategy to reduce the efficiency roll-off of the TADF sensitization system. |
| first_indexed | 2024-12-10T15:58:03Z |
| format | Article |
| id | doaj.art-4e054bd32c844c07a465534d58fa3f4b |
| institution | Directory Open Access Journal |
| issn | 2625-1825 |
| language | English |
| last_indexed | 2024-12-10T15:58:03Z |
| publishDate | 2021-12-01 |
| publisher | Georg Thieme Verlag |
| record_format | Article |
| series | Organic Materials |
| spelling | doaj.art-4e054bd32c844c07a465534d58fa3f4b2022-12-22T01:42:34ZengGeorg Thieme VerlagOrganic Materials2625-18252021-12-0130448849210.1055/a-1711-5768Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-OffZhiyi Li0Ruifang Wang1Yangyang Zeng2Xiangyu Dong3Guanhao Liu4Xiaoxiao Hu5Teng Gao6Honglei Gao7Yuanyuan Qin8Xiuxian Gu9Chun-Sing Lee10Jiguang Liu11Pengfei Wang12Ying Wang13Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaSchool of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaCenter of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Hong Kong SAR, P. R. of ChinaSchool of Materials Design & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaKey Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU−CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. of ChinaAbstract Thermally activated delayed fluorescence (TADF)-sensitized fluorescence is a promising strategy to maintain the advantage of TADF materials and fluorescent materials. Nevertheless, the delayed lifetime of the TADF sensitizer is still relatively long, which causes heavy efficiency roll-off. Here we reported a valid tactic to construct fluorescent devices with low-efficiency roll-off by utilizing the TADF sensitizer with a reduced delayed lifetime. By the construction of the sensitization system, the energy transfer efficiency can reach up to 90%. The high-energy transfer efficiency and the TADFʼs short delayed lifetime result in high sensitization over 95% and the maximum external quantum efficiency of 16.2%. Meanwhile, the TADF-sensitized fluorescent devices exhibit reduced efficiency roll-off with an “onset” current density of 23 mA · cm−2. Our results provide an effective strategy to reduce the efficiency roll-off of the TADF sensitization system.http://www.thieme-connect.de/DOI/DOI?10.1055/a-1711-5768oledfluorescencetadf |
| spellingShingle | Zhiyi Li Ruifang Wang Yangyang Zeng Xiangyu Dong Guanhao Liu Xiaoxiao Hu Teng Gao Honglei Gao Yuanyuan Qin Xiuxian Gu Chun-Sing Lee Jiguang Liu Pengfei Wang Ying Wang Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off Organic Materials oled fluorescence tadf |
| title | Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off |
| title_full | Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off |
| title_fullStr | Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off |
| title_full_unstemmed | Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off |
| title_short | Sensitized Fluorescence Organic Light-Emitting Diodes with Reduced Efficiency Roll-Off |
| title_sort | sensitized fluorescence organic light emitting diodes with reduced efficiency roll off |
| topic | oled fluorescence tadf |
| url | http://www.thieme-connect.de/DOI/DOI?10.1055/a-1711-5768 |
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