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• W2260181398 abstract "Three m-terphenyl oxadiazole derivatives, 3,3″-bis(5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl)-1,1′:3′,1″-terphenyl (4PyOXD), 3,3″-bis(5-(pyridin-3-yl)-1,3,4-oxadiazol-2-yl)-1,1′:3′,1″-terphenyl (3PyOXD), and 3,3″-bis(5-phenyl-1,3,4-oxadiazol-2-yl)-1,1′:3′,1″-terphenyl (PhOXD), were synthesized. They exhibit relatively high electron mobilities compared with those of known electron-transport materials such as TAZ, BAlq, and BCP+Alq3. These materials were then utilized as electron transporters and hole/exciton blockers for blue, green, and red phosphorescent organic light-emitting diodes. The devices exhibited reduced driving voltages, very high efficiency, and negligible roll-off. More importantly, among these three oxadiazole derivatives, PhOXD performed as an ideal electron-transporting material for the blue, green, and red devices with excellent external quantum efficiencies (EQEs, >26%) as well as current and power efficiencies. Using these materials as an electron-transporting/exciton-blocking layer, low roll-off was achieved for the devices, indicative of excellent confinement of the triplet excitons in the emitting layer even at high current densities. At the normal operation brightness of 1000 cd m–2, the EQEs remained >21.3% for these basic color devices. In addition, the relationships between physical properties and structures of the molecules such as the electron mobility, triplet energy gap, and efficiency can be clearly rationalized." @default.
• W2260181398 created "2016-06-24" @default.
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• W2260181398 date "2015-05-08" @default.
• W2260181398 modified "2023-10-14" @default.
• W2260181398 title "A Universal Electron-Transporting/Exciton-Blocking Material for Blue, Green, and Red Phosphorescent Organic Light-Emitting Diodes (OLEDs)" @default.
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• W2260181398 doi "https://doi.org/10.1021/acsami.5b01872" @default.
• W2260181398 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25875075" @default.
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