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An ambipolar compound, 9-(2-(4,5-diphenyl-4H-1,2,4-triazol-3-yl)phenyl)-9H-carbazole, is employed as a universal single host for efficient sky-blue (B), green (G), orange–red (R), BG, and white (W) phosphorescent organic light-emitting diodes (PhOLEDs) with an external quantum efficiency (ηEQE) of more than 20%. By integrating B and G emitters into the emitting layer (EML), an efficient BG PhOLED...
The densification and biocompatibility of sintered 3.0mol% yttria-tetragonal zirconia polycrystal (3Y-TZP) ceramics, with X wt% Fe2O3 and 5.0wt% mica powders (denoted by 3Y-TZP: X-5.0wt% mica) have been studied. When the pellets of 3Y-TZP: X-5.0wt% mica were sintered at 1300°C for 1h, the relative shrinkage increases from 19.20–19.43% with the X increased from 0.3 to 1.0. The relative shrinkage of...
In this report, we demonstrated a series of blue phosphorescent organic light-emitting diodes (OLED) using the mixed host as the partial emitting layer to achieve ultrahigh external quantum efficiency over 30%. The blue phosphorescent emitter was FIrpic and these host materials was developed by Professor Leung in Department of Chemistry, National Taiwan University. By well optimizing the doping ratio...
In this work, we demonstrated the electron-transporting layer (ETL) effects on device electroluminescence (EL) performance of blue phosphorescent organic light-emitting diodes (PhOLED). Three well known electron-transporting materials such as 3-(4-biphenyl-yl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (TAZ), diphenyl-bis[4-(pyridin-3-yl)phenyl]silane (DPPS) and 1,3,5-tri( m-pyrid-3-yl-phenyl)benzene...
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