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• W1968494974 endingPage "1212" @default.
• W1968494974 startingPage "1207" @default.
• W1968494974 abstract "1-Methyl-3-phenyl-1H-pyrazolo[3,4-b]quinolines (PAQ) carrying various substituents at the 6- or 7-position (PAQ-X, X = OMe, t-Bu, H, F, CN, CF3, NEt2) were synthesized and studied as emitting materials in an organic light-emitting diode (OLED). The 4,4‘-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (α-NPB) and 4,4‘-dicarbozolyl-1,1‘-biphenyl (CBP) were used as hole-transporting materials, whereas electron-transporting 2,2‘,2‘ ‘-(1,3,5-phenylene)tris[1-phenyl-1H-benzimidazole] (TPBI) was used as a host for the PAQ-X dopant. The device with a general configuration of ITO/NPB/CBP/TPBI:PAQ-X/TPBI/Mg:Ag, where the PAQ-X dye concentration was kept around 2 wt %, was fabricated, and emits a bright blue light for all PAQ dyes except diethylamino-substituted PAQ, which emits blue-green light. With the same structure details, the electroluminescence, turn-on voltage, and external quantum efficiency show a dependence on the substitution. In particular, the external quantum efficiency and power efficiency are higher for devices doped with electron-rich PAQs and lower for electron-deficient PAQs." @default.
• W1968494974 created "2016-06-24" @default.
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• W1968494974 date "2001-03-03" @default.
• W1968494974 modified "2023-09-25" @default.
• W1968494974 title "Organic Light-Emitting Diodes Based on Variously Substituted Pyrazoloquinolines as Emitting Material" @default.
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• W1968494974 doi "https://doi.org/10.1021/cm000622j" @default.
• W1968494974 hasPublicationYear "2001" @default.
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