Hybrid Tamm plasmon-polariton/microcavity modes for white top-emitting organic light-emitting devices

Abstract

White top-emitting organic light-emitting devices (WTOLEDs), emitting white light through a transparent top metallic electrode, have emerged as promising candidates as energy-efficient solid-state lighting sources and full-color flat-panel displays. The microcavity effect due to usage of metallic electrodes results in emission enhancement solely at a particular color, and therefore sets an obstacle for WTOLEDs, where at least two colors with balanced intensity should be emitted. Current efforts solving the problem basically rely on the relaxation of the microcavity effect, resulting in sacrificed light outcoupling efficiency in the original resonance region. Here, we demonstrate that by integrating a photonic crystal structure upon the top metallic electrode, an additional emission enhancement peak other than the one determined by the microcavity resonance could be provided by the Tamm plasmon-polariton mode. Mode hybridization induced dual hybrid modes with comparable light outcoupling efficiency can then be excited, from which two colors with balanced intensity could be emitted. Both experimental and theoretical results demonstrate that the proposed mode hybridization strategy may pave the way for the realization of WTOELDs towards high white color quality, improved viewing characteristics, and electroluminescence efficiency.

Chiral Optical Tamm States at the Interface between an All-Dielectric Polarization-Preserving Anisotropic Mirror and a Cholesteric Liquid Crystal

“…The obtained analytical expressions are in good agreement with the numerical calculations obtained using the Berreman matrix method [34,35]. The OTS can be further used for intelligent design for laser [36,37] and sensing applications [38].…”

Transparent conductive oxides for the epsilon-near-zero Tamm plasmon polaritons

“…In the energy spectra of a sample, the TPP can be seen as a narrow peak [2][3][4]. The spectral properties of the TPP can be controlled by varying the lattice parameters [5] or metallic film material [6]. The TPPs gave rise to the fundamentally new type of devices, which includes absorbers [7][8][9][10], switches [11], organic solar cells [12], thermal emitters [13,14], sensors [15,16] and spontaneous emission amplifiers [17].…”

Coupled Chiral Optical Tamm States in Cholesteric Liquid Crystals

“…If one of the media is a metal, the OTS is called a Tamm plasmon [4]. The interest in the OTSs and Tamm plasmons is due to their possible applications in lasers and emitters [5][6][7][8], sensors [9,10], photovoltaic devices [11], etc. Recently, Cheng et.…”