Oxadiazole based bipolar host materials employing planarized triarylamine donors for RGB PHOLEDs with low efficiency roll-off
文献类型：期刊论文
| 作者 | Kautny, Paul1; Lumpi, Daniel1; Wang, Yanping2; Tissot, Antoine3; Bintinger, Johannes1; Horkel, Ernst1; Stoeger, Berthold4; Hametner, Christian1; Hagemann, Hans3; Ma, Dongge2 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY C
 |
| 出版日期 | 2014 |
| 卷号 | 2期号:11页码:2069-2081 |
| ISSN号 | 2050-7526 |
| DOI | 10.1039/c3tc32338b |
| 英文摘要 | A series of 6 novel triarylamine-containing oxadiazole compounds (o-PCzPOXD, o-ICzPOXD, o-TPATOXD, o-PCzTOXD, o-ICzTOXD, o-CzTOXD) have been designed, synthesized and characterized concerning applications as host materials in PHOLED devices. To further improve the ortho-linkage concept, the impact of incorporating planarized electron-donating triarylamine (TAA) structures on intramolecular charge transfer was examined. The effect was evaluated for two series of electron-accepting oxadiazole scaffolds, realizing ortho-linkage on the benzene (POXD) and the thiophene (TOXD) cores. Thermal analysis shows increased glass-transition temperatures for planarized structures indicating an improved morphological stability. A higher degree of planarization also results in significantly increased singlet and triplet energy values, revealing the impact on the intramolecular charge transfer. Employing the developed materials, red (o-TPATOXD: CEmax: 28.8 cd A(-1), EQE(max): 16.9%), green (o-PCzPOXD: CEmax: 62.9 cd A(-1), EQE(max): 17.1%) and blue (o-PCzPOXD: CEmax: 29.8 cd A(-1), EQE(max): 13.4%) devices were achieved showing remarkably low efficiency roll-off for planarized donors. Hence, this is the first report of efficient blue devices for this specific class of host materials. It is proposed that the results correlate with an increasing ortho-linkage effect and decreasing donor strength of the TAA moiety by planarization and, thus, tackling one of the major challenges in PHOLED research: improving both triplet energy and compound stability. |
| 语种 | 英语 |
| WOS记录号 | WOS:000332028200018 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50601]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Lumpi, Daniel |
| 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.Univ Geneva, Dept Chim Phys, CH-1211 Geneva 4, Switzerland 4.Vienna Univ Technol, Inst Chem Technol & Analyt, A-1060 Vienna, Austria |
| 推荐引用方式 GB/T 7714 | Kautny, Paul,Lumpi, Daniel,Wang, Yanping,et al. Oxadiazole based bipolar host materials employing planarized triarylamine donors for RGB PHOLEDs with low efficiency roll-off[J]. JOURNAL OF MATERIALS CHEMISTRY C,2014,2(11):2069-2081. |
| APA | Kautny, Paul.,Lumpi, Daniel.,Wang, Yanping.,Tissot, Antoine.,Bintinger, Johannes.,...&Froehlich, Johannes.(2014).Oxadiazole based bipolar host materials employing planarized triarylamine donors for RGB PHOLEDs with low efficiency roll-off.JOURNAL OF MATERIALS CHEMISTRY C,2(11),2069-2081. |
| MLA | Kautny, Paul,et al."Oxadiazole based bipolar host materials employing planarized triarylamine donors for RGB PHOLEDs with low efficiency roll-off".JOURNAL OF MATERIALS CHEMISTRY C 2.11(2014):2069-2081. |
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来源：化学研究所
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