Achieving Hybridized Local and Charge-Transfer Excited State and Excellent OLED Performance Through Facile Doping
文献类型：期刊论文
| 作者 | Yuan, Wang Zhang1; Bin, Xin1; Chen, Gan1; He, Zihan1; Liu, Jun2; Ma, Huili3; Peng, Qian4; Wei, Bingwu2; Gong, Yongyang1; Lu, Yawei1 |
| 刊名 | ADVANCED OPTICAL MATERIALS
 |
| 出版日期 | 2017-11-02 |
| 卷号 | 5期号:21 |
| 关键词 | Charge Transport Doping Electroluminescence Organic Light-emitting Diodes (Oleds) |
| 英文摘要 | Hybridized local and charge-transfer (HLCT) excited states provide a new avenue for achieving high yields of singlet excitons (>25%) and outstanding electroluminescence (EL) performance in organic light-emitting diodes (OLEDs). In this contribution, donor-acceptor (D-A) structured (Z)-2,3-bis[4-(diphenylamino)phenyl]acrylonitrile (BDPACS) with aggregation-induced emission (AIE) characteristics is demonstrated to possess HLCT excited states in low-polarity solvents and in vacuum-deposited neat films. However, undoped OLED devices of the same material show unexpectedly poor performances with external quantum efficiencies (EQE(max)) of at most 0.41%, due to the formation of exciplexes or excimers. To alleviate this, doped devices are fabricated using low-polarity 2-methyl-9,10-di(2-naphthyl)anthracene (MADN), which has the appropriate energy levels to serve as a host in the emissive layer and can eradicate exciplexes/excimers and moreover help achieve the HLCT state through the solid-state solvation effect. Such devices exhibit strikingly improved EQE(max) of 6.8%, as well as singlet utilization yields exceeding the theoretical limit of 25%. Furthermore, all doped devices exhibit extremely low efficiency roll-off. These results may have significant implications for the future fabrication of high-performance OLEDs based on AIE luminogens and HLCT emitters. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39140]  |
| 专题 | 化学研究所_有机固体实验室 |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Shanghai Key Lab Elect Insulat & Thermal Aging, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Dept Elect Engn, Engn Lab TFT LCD Mat & Technol, 800 Dongchuan Rd, Shanghai 200240, Peoples R China 3.Tsinghua Univ, Dept Chem, Key Lab Organ OptoElect & Mol Engn, Zhongguancun St, Beijing 100084, Peoples R China 4.Chinese Acad Sci, Inst Chem, Zhongguancun North First St 2, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Wang Zhang,Bin, Xin,Chen, Gan,et al. Achieving Hybridized Local and Charge-Transfer Excited State and Excellent OLED Performance Through Facile Doping[J]. ADVANCED OPTICAL MATERIALS,2017,5(21). |
| APA | Yuan, Wang Zhang.,Bin, Xin.,Chen, Gan.,He, Zihan.,Liu, Jun.,...&Zhang, Yongming.(2017).Achieving Hybridized Local and Charge-Transfer Excited State and Excellent OLED Performance Through Facile Doping.ADVANCED OPTICAL MATERIALS,5(21). |
| MLA | Yuan, Wang Zhang,et al."Achieving Hybridized Local and Charge-Transfer Excited State and Excellent OLED Performance Through Facile Doping".ADVANCED OPTICAL MATERIALS 5.21(2017). |
入库方式： OAI收割
来源：化学研究所
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