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DOE OSTI · 2203741

Solid-State Lighting Using Side-by-Side White Phosphorescent Organic Light-Emitting Diodes

Arneson, Claire·Huang, Xinjing·Forrest, Stephen R.
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Abstract

White organic light-emitting diodes (WOLEDs) have become increasingly popular for use in solid-state illumination, where diffuse, large area light sources that achieve a high color rendering index and luminous power efficiency are desirable. Color-tunable emission, where the light source combines emission from multiple, separately addressed color elements, is conveniently provided by WOLEDs for the purpose of adapting the lighting source to a particular illumination requirement. In this work, we demonstrate a method for side-by-side positioning of monochromatic blue and yellow phosphorescent OLED stripes that are combined to create tunable white light, using a high resolution mechanical peel-off patterning method. We achieve a peak luminous power efficiency of 17.1 ± 0.3 lm W –1 and an external quantum efficiency of 11.8 ± 0.2% and demonstrate color tunability of the 1960 Commission Internationale d’Eclairage chromaticity coordinates from (u,v) = (0.33,0.36) to (0.12,0.32). This corresponds to a tuning rnge of the color rendering index from 74 ± 1 to 86 ± 1 and the correlated color temperature from 2000 to 8000 ± 500 K. Here, due to the nondestructive nature of the peel-off technique, patterned devices exhibit a lifetime comparable to conventional, shadow mask-patterned devices.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICScolorcolor-tunabilitydepositionelementsexternal quantum efficiencylifetimelightorganic light-emitting diodephosphorescencephotolithographysolid-state lighting

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Arneson, Claire, Huang, Xinjing, Forrest, Stephen R.. 2023-01-27. Solid-State Lighting Using Side-by-Side White Phosphorescent Organic Light-Emitting Diodes. https://doi.org/10.1021/acsphotonics.2c01698

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