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Doping concentration effect of the “red” dye DCM2 on the electroluminescent spectra, power efficiency, and chromaticity coordinates (inset) of the two-wavelength fluorescent OLEDs with emission changing from blue to orange with DCM2 concentration changing from 0% to 0.5%. Pure white emission was obtained as DCM2 was added within the range from 0.04% to 0.05%.
Doping concentration effect of the green dye C545T on the electroluminescent spectra and chromaticity coordinates (inset) of the three-wavelength fluorescent OLEDs with emission changing from white to greenish white with C545T concentration changing from 0% to 0.05%.
Photoluminescence spectrum of the host molecule of DPVBi and ultraviolet-visible absorption spectra of the guest molecules of DCM2 and C545T.
Luminance effect on the electroluminescent spectra and applied voltage effect on the power efficiency and luminance (inset) of the three-wavelength fluorescent white OLEDs composing the blue host of BANE dual doped by the greenish blue dye of DPVP with the same red dye of DCM2.
The effects of dopant concentration on the luminescent characteristics of the two- and three-wavelength fluorescent white organic light-emitting diodes having a single emission layer composing of a blue host of DPVBi doped with a trace amount of “red” dye DCM2 and doped with trace amounts of red dye DCM2 and green dye C545T, respectively.
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