Highly efficient iridium(III) phosphors with phenoxy-substituted ligands and their high-performance OLEDs
文献类型：期刊论文
| 作者 | Tan, Guiping1,2; Chen, Shuming3,4; Sun, Ning5; Li, Yanhu6; Fortin, Daniel7; Wong, Wai-Yeung2; Kwok, Hoi-Sing3,4; Ma, Dongge5; Wu, Hongbin6; Wang, Lixiang5 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY C
 |
| 出版日期 | 2013 |
| 卷号 | 1期号:4页码:808-821 |
| ISSN号 | 2050-7526 |
| DOI | 10.1039/c2tc00123c |
| 英文摘要 | Two new iridium(III) cyclometallated complexes (1 and 2) based on the 2-(1-phenoxy-4-phenyl)-5-methylpyridine ligand have been developed. By attaching a flexible phenoxy group on the phenyl ring of 2-phenylpyridine (Hppy), the light-emitting properties of the resulting IrIII complexes have been improved, while the introduction of an electron-donating methyl group on the pyridyl ring of Hppy can keep the triplet emission in the green region by compensating for the reduced energy gap caused by the phenoxy group. Owing to the unique electronic structures induced by the ligand, the vacuum-evaporated organic light-emitting devices (OLEDs) of the type [ITO/NPB (40 nm)/(1 or 2): CBP (20 nm)/ BCP (10 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (100 nm)] furnished peak OLED efficiencies at 10.0%, 31.1 cd A(-1) and 14.5 lm W-1 for 1 and 11.7%, 38.1 cd A(-1) and 31.8 lm W-1 for 2. By replacing the electron-injection/electron-transporting materials (BCP and Alq3) with TPBi, the green-emitting devices based on 1 gave outstanding peak efficiencies at 22.5%, 76.2 cd A(-1) and 72.8 lm W-1. Extremely high peak efficiencies of 24.5%, 84.6 cd A(-1) and 77.6 lm W-1 were even obtained for the 2-doped devices and both of them are superior in performance to the benchmark dopants Ir(ppy) 3 and Ir(ppy) 2(acac). Moreover, polymer light-emitting devices were also fabricated using 1 and 2 via the spin-coating method, and their device performances are characterized by 14.4%, 39.5 cd A(-1) and 12.4 lm W-1 for 1 and 12.6%, 29.6 cd A(-1) and 18.1 lm W-1 for 2. When 2 was used to make three-color white-light OLEDs, respectable device efficiencies of 15.3 cd A(-1), 7.5% and 9.1 lm W-1 were achieved and their white color CIE coordinates are improved relative to Ir(ppy)(3). |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000314803400025 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/46757]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Tan, Guiping |
| 作者单位 | 1.Dongguan Univ Technol, Coll Chem & Environm Engn, Dongguan 523808, Peoples R China 2.Hong Kong Baptist Univ, Inst Adv Mat, Dept Chem, Inst Mol Funct Mat, Kowloon Tong, Hong Kong, Peoples R China 3.Hong Kong Univ Sci & Technol, Ctr Display Res, Kowloon, Hong Kong, Peoples R China 4.Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Kowloon, Hong Kong, Peoples R China 5.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 6.S China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China 7.Univ Sherbrooke, Dept Chim, Sherbrooke, PQ J1K 2R1, Canada |
| 推荐引用方式 GB/T 7714 | Tan, Guiping,Chen, Shuming,Sun, Ning,et al. Highly efficient iridium(III) phosphors with phenoxy-substituted ligands and their high-performance OLEDs[J]. JOURNAL OF MATERIALS CHEMISTRY C,2013,1(4):808-821. |
| APA | Tan, Guiping.,Chen, Shuming.,Sun, Ning.,Li, Yanhu.,Fortin, Daniel.,...&Harvey, Pierre D..(2013).Highly efficient iridium(III) phosphors with phenoxy-substituted ligands and their high-performance OLEDs.JOURNAL OF MATERIALS CHEMISTRY C,1(4),808-821. |
| MLA | Tan, Guiping,et al."Highly efficient iridium(III) phosphors with phenoxy-substituted ligands and their high-performance OLEDs".JOURNAL OF MATERIALS CHEMISTRY C 1.4(2013):808-821. |
入库方式： OAI收割
来源：化学研究所
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