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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...
A new organic host material, PCT comprising pyridine, carbazole and triazole moieties, was doped with a blue emitter bis[2-(4,6"difluorophenyl)pyridinato-C2,N](pico]inato)iridium(III) (FIrpic) to be an emitting layer (EML) of a phosphorescent organic light-emitting diodes device (PhOLED). With various FIrpic concentration (12%, 15% and 18% by volume ratio) in the EML, a series of high efficiency...
We reported a blue phosphorescent organic light-emitting diode (OLED) with the highest current efficiency of 55.2 cd/A, power efficiency of 50.5 lm/W and external quantum efficiency (EQE) of 24.8%, by using a tetraphenylsilane host in the emitting layer doped with blue emitter, bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(in) (FIrpic).
We demonstrated a blue phosphorescent organic light-emitting diode with the maximum current efficiency and power efficiency of 57.4 cd/A and 51.6 lm/W, respectively, based on trizaole derivatives as the host of the emitting layer.
The two novel benzimidazole/carbazole hybrid ambipolar molecules, o-CbzDiBz and m-CbzDiBz, were synthesized as hosts for blue PHOLEDs. Bis[2-(4,6-diiluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic)-based devices can achieve 41.86 and 49.31 cd/A of current efficiency in o-CbzDiBz and m-CbzDiBz matrix, respectively.
A high-efficiency blue phosphorescence organic light-emitting diode (OLED) with a new ambipolar organic compound, 9-(2-(4,5-diphenyl-4H-1,2,4-triazol-3-yl)phenyl)-9H-carbazole (CbzTAZ) as the host, structurally engineered the emitting layer (EML) and electron-transporting layer (ETL) to achieve the great carrier balance in the EML. The chemical structure of CbzTAZ contains an electron-transporting...
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