A highly efficient two-element white light organic light-emitting device with a sky blue dopant BUBD-1 and a yellow dopant TBRb was fabricated. The device achieved an electroluminescence efficiency of 17.1 cdA and 7.9 lmW at 20 mA cm2. From 112 to 32 010 nits, the CIEx,y coordinates variation was Δ (x,y) <± (0.01,0.01), which is superior to common white light organic light-emitting devices (OLEDs) that tend to change color with drive conditions. Moreover, the device reached a half-decay t12 lifetime over 40 000 h at an initial luminance of 300 cd m2. This result is among the best records of fluorescent white light OLEDs.
Scopus Subject Areas
- Physics and Astronomy (miscellaneous)