Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED
For the first time, electroplex emission is utilized to enhance the performance of nondoped blue organic light-emitting diodes (OLEDs). By decorating the twisted blue-emitting platform and adjusting the electronic structure, three molecules of 3Cz-Ph-CN, 3Cz-mPh-CN, and 3Ph-Cz-CN with a donor-accept...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2020-01-01
|
| Series: | Research |
| Online Access: | http://dx.doi.org/10.34133/2020/8649102 |
| _version_ | 1797280569456852992 |
|---|---|
| author | Xuejun Zhan Zhongbin Wu Yanbin Gong Jin Tu Yujun Xie Qian Peng Dongge Ma Qianqian Li Zhen Li |
| author_facet | Xuejun Zhan Zhongbin Wu Yanbin Gong Jin Tu Yujun Xie Qian Peng Dongge Ma Qianqian Li Zhen Li |
| author_sort | Xuejun Zhan |
| collection | DOAJ |
| description | For the first time, electroplex emission is utilized to enhance the performance of nondoped blue organic light-emitting diodes (OLEDs). By decorating the twisted blue-emitting platform and adjusting the electronic structure, three molecules of 3Cz-Ph-CN, 3Cz-mPh-CN, and 3Ph-Cz-CN with a donor-acceptor structure are synthesized and investigated. When external voltage is applied, electroplex emission, which contributes to the emission performance of OLED, can be realized at the interface between the emitting layer and the electron-transporting layer. Accordingly, high external quantum efficiency of 18.1% can be achieved, while the emission wavelength of the device can be controlled in the blue region. Our results provide the possibility to enhance the performance of OLED through electroplex emission, in addition to the generally investigated thermally activated delayed fluorescence (TADF). Excitedly, when 3Ph-Cz-CN is used as host material in orange-emitting phosphorous OLEDs (PO-01 as the dopant), unprecedented high external quantum efficiency of 27.4% can also be achieved. |
| first_indexed | 2024-03-07T16:42:07Z |
| format | Article |
| id | doaj.art-3c8ec09e54ea4957b7a7ae6735a0032e |
| institution | Directory Open Access Journal |
| issn | 2639-5274 |
| language | English |
| last_indexed | 2024-03-07T16:42:07Z |
| publishDate | 2020-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj.art-3c8ec09e54ea4957b7a7ae6735a0032e2024-03-03T07:28:33ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742020-01-01202010.34133/2020/8649102Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLEDXuejun Zhan0Zhongbin Wu1Yanbin Gong2Jin Tu3Yujun Xie4Qian Peng5Dongge Ma6Qianqian Li7Zhen Li8Department of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan 430072, ChinaChangchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun 130022, ChinaDepartment of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan 430072, ChinaDepartment of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan 430072, ChinaInstitute of Molecular Aggregation Science, Tianjin University, Tianjin 300072, ChinaInstitute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, ChinaDepartment of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan 430072, ChinaDepartment of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan 430072, China; Institute of Molecular Aggregation Science, Tianjin University, Tianjin 300072, ChinaFor the first time, electroplex emission is utilized to enhance the performance of nondoped blue organic light-emitting diodes (OLEDs). By decorating the twisted blue-emitting platform and adjusting the electronic structure, three molecules of 3Cz-Ph-CN, 3Cz-mPh-CN, and 3Ph-Cz-CN with a donor-acceptor structure are synthesized and investigated. When external voltage is applied, electroplex emission, which contributes to the emission performance of OLED, can be realized at the interface between the emitting layer and the electron-transporting layer. Accordingly, high external quantum efficiency of 18.1% can be achieved, while the emission wavelength of the device can be controlled in the blue region. Our results provide the possibility to enhance the performance of OLED through electroplex emission, in addition to the generally investigated thermally activated delayed fluorescence (TADF). Excitedly, when 3Ph-Cz-CN is used as host material in orange-emitting phosphorous OLEDs (PO-01 as the dopant), unprecedented high external quantum efficiency of 27.4% can also be achieved.http://dx.doi.org/10.34133/2020/8649102 |
| spellingShingle | Xuejun Zhan Zhongbin Wu Yanbin Gong Jin Tu Yujun Xie Qian Peng Dongge Ma Qianqian Li Zhen Li Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED Research |
| title | Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED |
| title_full | Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED |
| title_fullStr | Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED |
| title_full_unstemmed | Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED |
| title_short | Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED |
| title_sort | utilizing electroplex emission to achieve external quantum efficiency up to 18 1 in nondoped blue oled |
| url | http://dx.doi.org/10.34133/2020/8649102 |
| work_keys_str_mv | AT xuejunzhan utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT zhongbinwu utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT yanbingong utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT jintu utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT yujunxie utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT qianpeng utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT donggema utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT qianqianli utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled AT zhenli utilizingelectroplexemissiontoachieveexternalquantumefficiencyupto181innondopedblueoled |