Manipulating charge-transfer character with electron-withdrawing main-group moieties for the color tuning of iridium electrophosphors
文献类型：期刊论文
| 作者 | Zhou, Guijiang1; Ho, Cheuk-Lam1; Wong, Wai-Yeting1; Wang, Qi2; Ma, Dongge2; Wang, Lixiang2; Lin, Zhenyang4; Marder, Todd B.3; Beeby, Andrew3 |
| 刊名 | ADVANCED FUNCTIONAL MATERIALS
 |
| 出版日期 | 2008-02-11 |
| 卷号 | 18期号:3页码:499-511 |
| ISSN号 | 1616-301X |
| DOI | 10.1002/adfm.200700719 |
| 英文摘要 | A new and synthetically versatile strategy has been developed for the phosphorescence color tuning of cyclometalated iridium phosphors by simple tailoring of the phenyl ring of ppy (Hppy=2-phenylpyridine) with various main-group moieties in [Ir(ppy-X)(2)(acac)] (X=B(Mes)(2), SiPh3, GePh3, NPh2, POPh2, OPh, SPh, SO2Ph). This can be achieved by shifting the charge-transfer character from the pyridyl groups in some traditional iridium ppy-type complexes to the electron-withdrawing main-group moieties and these assignments were supported by theoretical calculations. This new color tuning strategy in Ir-III-based triplet emitters using electron-withdrawing main-group moieties provides access to Ir-III phosphors with improved electron injection/electron transporting features essential for highly efficient, color-switchable organic light-emitting diodes (OLEDs). The present work furnished OLED colors spanning from bluish-green to red (505-609 nm) with high electroluminescence efficiencies which have great potential for application in multicolor displays. The maximum external quantum efficiency of 9.4%, luminance efficiency of 10.3 cd A(-1) and power efficiency of 5.0 lm W-1 for the red OLED (X = B(Mes)(2)), 11.1%, 35.0 cd A(-1), and 26.8 lm W-1 for the bluish-green device (X=OPh), 10.3%, 36.9 cd A(-1), and 28.6 lm W-1 for the bright green device (X = NPh2) as well as 10.7%, 35.1 cd A(-1), and 23.1 lm W-1 for the yellow-emitting device (X = SO2Ph) can be obtained. |
| 语种 | 英语 |
| WOS记录号 | WOS:000253624400014 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/65525]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhou, Guijiang |
| 作者单位 | 1.Hong Kong Baptist Univ, Dept Chem, Kowloon, Hong Kong, Peoples R China 2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 3.Univ Durham, Dept Chem, Durham DH1 3LE, England 4.Hong Kong Univ Sci & Technol, Dept Chem, Clearwater Bay, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Guijiang,Ho, Cheuk-Lam,Wong, Wai-Yeting,et al. Manipulating charge-transfer character with electron-withdrawing main-group moieties for the color tuning of iridium electrophosphors[J]. ADVANCED FUNCTIONAL MATERIALS,2008,18(3):499-511. |
| APA | Zhou, Guijiang.,Ho, Cheuk-Lam.,Wong, Wai-Yeting.,Wang, Qi.,Ma, Dongge.,...&Beeby, Andrew.(2008).Manipulating charge-transfer character with electron-withdrawing main-group moieties for the color tuning of iridium electrophosphors.ADVANCED FUNCTIONAL MATERIALS,18(3),499-511. |
| MLA | Zhou, Guijiang,et al."Manipulating charge-transfer character with electron-withdrawing main-group moieties for the color tuning of iridium electrophosphors".ADVANCED FUNCTIONAL MATERIALS 18.3(2008):499-511. |
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来源：化学研究所
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