Phosphorescent molecularly doped light-emitting diodes with blended polymer host and wide emission spectra

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Abstract

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.

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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

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