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https://ir.lib.ncu.edu.tw/handle/987654321/101609
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| 題名: | New platinum complexes exhibiting host dependent photoluminescence as single dopants in double emitting layer, voltage independent hybrid white electroluminescence devices |
| 作者: | 陳錦地;Poloek, Anurach;Wang, Chieh;Chang, Yung-Ting;Lin, Chiao-Wen;Chen, Chao-Tsen;Chen, Chin-Ti |
| 貢獻者: | 理學院化學學系 |
| 日期: | 2015-09-22 |
| 上傳時間: | 2026-04-21 14:38:58 (UTC+8) |
| 出版者: | Royal Society of Chemistry |
| 摘要: | 摘要： Four heteroleptic platinum complexes ( FPtXND s) bearing 4-hydroxy-1,5-naphthyridine ( XND ) derivatives functionalized with phenyl ( X = Ph ), dimethylamino ( X = dma ), morpholino ( X = mor ), or phenoxazino ( X = pxz ) units as one ligand and 2-(2,4-difluorophenyl)pyridine ( F ) as the other common ligand were newly synthesized and characterized. Each platinum complex has absorption and photoluminescence (PL) spectroscopic characteristics. As demonstrated by X-ray crystallography (of FPtdmaND and FPtpxzND ), electrochemical and theoretical studies, the unusual spectroscopic features of FPtpxzND (such as its weak absorption band around 450-600 nm, its significant concentration dependent solution PL wavelength but low host dependent thin film PL wavelength (which is relatively long) and its particularly low solution PL quantum yield ( Φ PL )) the relatively strong absorption of FPtdmaND and FPtmorND , and the relatively long PL wavelength of FPtPhND have been reasonably explained. After each platinum complex had been examined for monochromatic organic light-emitting diodes (OLEDs), having a relatively high Φ PL as well as an appropriate greenish yellow PL in the monomeric form and an orange to red PL in the aggregate/excimeric form, FPtdmaND and FPtmorND have been chosen as dopant materials in the construction of single or double emitting layer (EML) hybrid white organic light-emitting diodes (OLEDs). A high performance warm white electroluminescence (EL) (CIE x , y (0.42-0.43, 0.43-0.44)) was obtained where the same platinum complex dopant FPtdmaND was doped (5 or 8 wt%) in two EMLs, 4,4′-di(9 H -carbazol-9-yl)-1,1′-biphenyl (CBP) harvesting monomeric emission and the highly fluorescent blue N , N ′-di-1-naphthalenyl- N , N ′-diphenyl-[1,1′:4′,1′′:4′′,1′′′-quaterphenyl]-4,4′′′-diamine (4P-NPD) harvesting excimer/aggregate emission. This warm white EL showed a high colour rendering index (CRI) of 86-88, and a reasonably good EL efficiency of 9.7%, 22.5 cd A −1 , or 10.7 lm W −1 . EL with improved white chromaticity (CIE x , y (0.37-0.39, 0.39-0.41)) can be obtained using FPtmorND as the single dopant, although it has a somewhat inferior CRI (84-86) and EL efficiency (8.3%, 20.1 cd A −1 , or 9.5 lm W −1 ). Nevertheless, both double EML hybrid white OLEDs exhibit a rather constant CRI and CIE x , y under a driving voltage between 7 and 10 V. New platinum complexes ( FPtXND s) bearing 4-hydroxy-1,5-naphthyridines ( XND s) functionalized with phenyl, dimethylamino, morpholino or phenoxazino ( X = Ph , dma , mor or pxz ) units were used in hybrid white OLEDs.
出版日期： 2015-10-22
資源來源： Royal Society of Chemistry
識別號： ISSN: 2050-7526
識別號： EISSN: 2050-7534
識別號： DOI: 10.1039/c5tc02523k |
| 顯示於類別: | [化學學系] 期刊論文
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