Photonic band structure in one-dimensional crystals of stacked microcavity OLEDs

Matthew White; David Allemeier; Ekraj Dahal

doi:10.1117/12.2568129

20 August 2020 Photonic band structure in one-dimensional crystals of stacked microcavity OLEDs

Matthew White, David Allemeier, Ekraj Dahal

Proceedings Volume 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV; 114730D (2020) https://doi.org/10.1117/12.2568129
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

A microcavity OLED, consisting of a conventional OLED stack with two metallic mirror electrodes, shows narrow-band emission centered around specific peak resonant wavelengths. These cavity modes are analogous to the energy states found in any resonator system, including musical instrument strings and 1-dimensional quantum square wells. Here we incorporate the microcavity OLED as a unit cell in a photonic crystal. Stacking N microcavities splits the resonant modes into N discrete states. We demonstrate methods to control the photonic density of states and to induce a photonic bandgap. Furthermore, we investigate the effect of various device variables, including N and the thickness of the semi-transparent metal electrodes, on emission properties such as peak wavelength, FWHM, and Q-factor for each of the photonic states. The experimental results are guided by a predictive computational modelling tool, which is critically important for the complex-architecture devices.

Conference Presentation

Citation Download Citation

Matthew White, David Allemeier, and Ekraj Dahal "Photonic band structure in one-dimensional crystals of stacked microcavity OLEDs", Proc. SPIE 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV, 114730D (20 August 2020); https://doi.org/10.1117/12.2568129

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