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20 August 2020 Highly efficient polariton emission from microcavity organic light emitting diodes
Andreas Mischok, Sabina Hillebrandt, Seonil Kwon, Malte C. Gather
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Proceedings Volume 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV; 114730S (2020) https://doi.org/10.1117/12.2567891
Event: SPIE Organic Photonics + Electronics, 2020, Online Only
Abstract
Electrically pumped emission of light-matter exciton-polaritons is of great fundamental and practical interest but so far suffers from poor efficiency. Here, we present a universal strategy to generate polariton emission from state-of-the-art organic light emitting diodes (OLED). We demonstrate green and red emitting devices reaching an external quantum efficiency above 12% and a luminance greater 10,000 cd/m^2 and providing narrowband (FWHM 16nm) and nearly angle-independent (shift <6nm) emission spectra. The device characteristics are readily tunable by changing coupling strength and cavity detuning. Our results show the practical relevance of strong coupling for providing spectrally pure and colour-stable electroluminescence.
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Andreas Mischok, Sabina Hillebrandt, Seonil Kwon, and Malte C. Gather "Highly efficient polariton emission from microcavity organic light emitting diodes", Proc. SPIE 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV, 114730S (20 August 2020); https://doi.org/10.1117/12.2567891
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KEYWORDS
Organic light emitting diodes
Polaritons
Optical microcavities
External quantum efficiency
Solar cells
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