Controlling singlet-triplet splitting in carbazole-oxadiazole based bipolar phosphorescent host materials
文献类型：期刊论文
| 作者 | Kautny, Paul1; Wu, Zhongbin2; Stoeger, Berthold3; Tissot, Antoine4; Horkel, Ernst1; Chen, Jiangshan2; Ma, Dongge2; Hagemann, Hans4; Frohlich, Johannes1; Lumpi, Daniel1 |
| 刊名 | ORGANIC ELECTRONICS
 |
| 出版日期 | 2015-02-01 |
| 卷号 | 17页码:216-228 |
| 关键词 | Pholed High Triplet Energy Low Efficiency Roll-off Sterically Induced Torsion Structure-property Relationship |
| ISSN号 | 1566-1199 |
| DOI | 10.1016/j.orgel.2014.11.027 |
| 英文摘要 | A rational molecular design strategy for carbazole-oxadiazole based bipolar host materials was developed to improve the device efficiency of blue phosphorescent organic light-emitting diodes (PHOLED). Steric effects of strategically placed methyl groups led to an increase of triplet energies (o-2MPCzPOXD: 2.66 eV and o-3MPCzPOXD: 2.73 eV versus the initial host material o-PczPOXD: 2.62 eV) while less pronouncedly affecting singlet energies and, therefore, retaining low driving voltages, high power efficiencies and remarkably low efficiency roll-offs in PHOLEDs. The maximum quantum efficiencies (EQE) for blue devices (FIrpic) were significantly raised for o-2MPCzPOXD (13.6%) and o-3MPCzPOXD (11.5%) versus o-PCzPOXD (9.0%) although yielding comparable values for green devices (Ir(ppy)(3); 12.9% and 15.4% versus 13.2%). Supported by theoretical calculations a structure-property relationship was established from photo-physical properties, PHOLED performance measurements and structural characterization from single crystal data. (C) 2014 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000348495400029 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/53289]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Chen, Jiangshan |
| 作者单位 | 1.Vienna Univ Technol, Inst Appl Synthet Chem, A-1060 Vienna, Austria 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 3.Vienna Univ Technol, Inst Chem Technol & Analyt, A-1060 Vienna, Austria 4.Univ Geneva, Dept Chim Phys, CH-1211 Geneva 4, Switzerland |
| 推荐引用方式 GB/T 7714 | Kautny, Paul,Wu, Zhongbin,Stoeger, Berthold,et al. Controlling singlet-triplet splitting in carbazole-oxadiazole based bipolar phosphorescent host materials[J]. ORGANIC ELECTRONICS,2015,17:216-228. |
| APA | Kautny, Paul.,Wu, Zhongbin.,Stoeger, Berthold.,Tissot, Antoine.,Horkel, Ernst.,...&Lumpi, Daniel.(2015).Controlling singlet-triplet splitting in carbazole-oxadiazole based bipolar phosphorescent host materials.ORGANIC ELECTRONICS,17,216-228. |
| MLA | Kautny, Paul,et al."Controlling singlet-triplet splitting in carbazole-oxadiazole based bipolar phosphorescent host materials".ORGANIC ELECTRONICS 17(2015):216-228. |
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来源：化学研究所
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