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dc.contributor.authorPoloek, Anurachen_US
dc.contributor.authorWang, Chiehen_US
dc.contributor.authorChang, Yung-Tingen_US
dc.contributor.authorLin, Chiao-Wenen_US
dc.contributor.authorChen, Chao-Tsenen_US
dc.contributor.authorChen, Chin-Tien_US
dc.date.accessioned2015-12-02T02:59:41Z-
dc.date.available2015-12-02T02:59:41Z-
dc.date.issued2015-01-01en_US
dc.identifier.issn2050-7526en_US
dc.identifier.urihttp://dx.doi.org/10.1039/c5tc02523ken_US
dc.identifier.urihttp://hdl.handle.net/11536/128450-
dc.description.abstractFour heteroleptic platinum complexes (FPtXNDs) 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 (Phi(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 lightemitting diodes (OLEDs), having a relatively high FPL 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) (CIEx,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(9H-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 (CIEx,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 CIEx,y under a driving voltage between 7 and 10 V.en_US
dc.language.isoen_USen_US
dc.titleNew platinum complexes exhibiting host dependent photoluminescence as single dopants in double emitting layer, voltage independent hybrid white electroluminescence devicesen_US
dc.typeArticleen_US
dc.identifier.doi10.1039/c5tc02523ken_US
dc.identifier.journalJOURNAL OF MATERIALS CHEMISTRY Cen_US
dc.citation.issue42en_US
dc.citation.spage11163en_US
dc.citation.epage11177en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
dc.identifier.wosnumberWOS:000363663100026en_US
dc.citation.woscount0en_US
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