Stable green light emission and high efficiency organic devices with three polymer layers were fabricated using bis[2-(4′-tert-butylphenyl)-1-phenyl-1 H -benzoimidazole- N ,C 2 ′] iridium(III) (acetylacetonate) doped in blended host materials. The 1 wt% doping concentration showed maximum luminance of 7841 cd/cm 2 at 25.6 V and maximum current efficiency of 9.95 cd/A at 17.2 V. The electroluminescence spectra of devices indicated two main peaks at 522 nm and 554 nm coming from phosphor dye and a full width at half maximum (FWHM) of 116 nm. The characteristics of using blended host, doping iridium complex, emission spectrum, and power efficiency of organic devices were investigated.
Wang, J., Gou, J., & Li, W. (2013). Phosphorescent molecularly doped light-emitting diodes with blended polymer host and wide emission spectra. The Scientific World Journal, 2013. https://doi.org/10.1155/2013/954146