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

Arneson, Claire; Huang, Xinjing; Forrest, Stephen R.

doi:10.1021/acsphotonics.2c01698

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

Journal Article · Thu Jan 26 23:00:00 EST 2023 · ACS Photonics

DOI:https://doi.org/10.1021/acsphotonics.2c01698· OSTI ID:2203741

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University of Michigan, Ann Arbor, MI (United States); University of Michigan
University of Michigan, Ann Arbor, MI (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: University of Michigan, Ann Arbor, MI (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0008723; EE0009166

OSTI ID:: 2203741

Journal Information:: ACS Photonics, Journal Name: ACS Photonics Journal Issue: 2 Vol. 10; ISSN 2330-4022

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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

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