Optical filters and OLEDs with narrow linewidth and low angle dispersion via strong light-matter coupling

Andreas Mischok; Sabina Hillebrandt; Seonil Kwon; Malte C. Gather

doi:10.1117/12.2595355

1 August 2021 Optical filters and OLEDs with narrow linewidth and low angle dispersion via strong light-matter coupling

Andreas Mischok, Sabina Hillebrandt, Seonil Kwon, Malte C. Gather

Proceedings Volume 11808, Organic and Hybrid Light Emitting Materials and Devices XXV; 118080Q (2021) https://doi.org/10.1117/12.2595355
Event: SPIE Organic Photonics + Electronics, 2021, San Diego, California, United States

Abstract

Organic materials are good absorbers for optical filters and good emitters for OLEDs, largely due to their high oscillator strengths. However, this comes at the cost of broad spectral linewidths, which limits the usefulness of absorptive filters and restricts colour purity in displays. Interference-based structures offer narrower spectra but show an intrinsic and often substantial angle dependence. Here, we overcome these limitations by combining the concepts of absorption and interference. Introducing absorbers into a microcavity leads to a coupled polariton state that inherits the low dispersion of the material exciton and the narrow linewidth of the cavity mode and thus enables line-filters with record spectral discrimination and angular stability (e.g., FWHM <50meV/11nm @538nm central wavelength, angle shift <26meV/6nm @80° tilt). Using a similar concept, we show efficient OLEDs with angle-independent, narrowband emission (EQE >10%, FWHM <20nm, angle shift <10nm @60° tilt).

Conference Presentation

Citation Download Citation

Andreas Mischok, Sabina Hillebrandt, Seonil Kwon, and Malte C. Gather "Optical filters and OLEDs with narrow linewidth and low angle dispersion via strong light-matter coupling", Proc. SPIE 11808, Organic and Hybrid Light Emitting Materials and Devices XXV, 118080Q (1 August 2021); https://doi.org/10.1117/12.2595355

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