Molecular design to regulate the photophysical properties of multifunctional TADF emitters towards high-performance TADF-based OLEDs with EQEs up to 22.4% and small efficiency roll-offs
文献类型：期刊论文
| 作者 | Yu, Ling1; Wu, Zhongbin2; Xie, Guohua1; Zeng, Weixuan1; Ma, Dongge2,3; Yang, Chuluo1 |
| 刊名 | CHEMICAL SCIENCE
 |
| 出版日期 | 2018-02-07 |
| 卷号 | 9期号:5页码:1385-1391 |
| ISSN号 | 2041-6520 |
| DOI | 10.1039/c7sc04669c |
| 英文摘要 | Simultaneously achieving high efficiency and low efficiency roll-off remains a big challenge for OLEDs based on thermally activated delayed fluorescence (TADF) emitters. To address this issue, we elaborately designed and synthesized a series of new emitters with both TADF and aggregation-induced emission (AIE) properties by introducing 9,9-dimethyl-9,10-dihydroacridine (DMAC) or 10H-phenoxazine (PXZ) as donor units into a quinoxaline framework. By tuning the electron-donating capability of the donor as well as the amount of donor unit, the photophysical properties of the TADF-AIE emitters can be systematically regulated, with emissions ranging from green to red. We demonstrated efficient doped OLEDs with a maximum EQE of 22.4%, a maximum current efficiency (CEmax) of 80.3 cd A(-1) and a maximum power efficiency (PEmax) of 64.1 lm W-1 for the green device, and an EQE(max) of 14.1%, a CEmax of 36.1 cd A(-1) and a PEmax of 28.1 lm W-1 for the orange device. Remarkably, these orange devices rendered small roll-offs of 1.4% and 21.3% respectively at a luminance of 100 and 1000 cd m(-2). Attributed to the unique TADF and AIE features, the non-doped devices perform outstandingly with an EQE(max) of 12.0%, a CEmax of 41.2 cd A(-1) and a PEmax of 45.4 lm W-1. |
| 语种 | 英语 |
| WOS记录号 | WOS:000424010600035 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/45715]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Ma, Dongge; Yang, Chuluo |
| 作者单位 | 1.Wuhan Univ, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Hubei Key Lab Organ & Polymer Optoelect Mat, Dept Chem, Wuhan 430072, Peoples R China 2.Univ Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 3.South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Ling,Wu, Zhongbin,Xie, Guohua,et al. Molecular design to regulate the photophysical properties of multifunctional TADF emitters towards high-performance TADF-based OLEDs with EQEs up to 22.4% and small efficiency roll-offs[J]. CHEMICAL SCIENCE,2018,9(5):1385-1391. |
| APA | Yu, Ling,Wu, Zhongbin,Xie, Guohua,Zeng, Weixuan,Ma, Dongge,&Yang, Chuluo.(2018).Molecular design to regulate the photophysical properties of multifunctional TADF emitters towards high-performance TADF-based OLEDs with EQEs up to 22.4% and small efficiency roll-offs.CHEMICAL SCIENCE,9(5),1385-1391. |
| MLA | Yu, Ling,et al."Molecular design to regulate the photophysical properties of multifunctional TADF emitters towards high-performance TADF-based OLEDs with EQEs up to 22.4% and small efficiency roll-offs".CHEMICAL SCIENCE 9.5(2018):1385-1391. |
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来源：化学研究所
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