Efficient Photon Extraction in Top‐Emission Organic Light‐Emitting Devices Based on Ampicillin Microstructures (Adv. Mater. 32/2022)

Plasmonic Nanocavity Organic LightEmitting Diode with Significantly Enhanced Light Extraction, Contrast, Viewing Angle, Brightness, and LowGlare

or high light extraction inorganic LEDs (fl ip-chip with metallic high refl ectivemirror). [ 10 ] All current methods for good contrast uses the methods that absorb the ambient light (e.g., circular polarizers, light absorbing layers, destructive-interference buffer layers, and low light refl ection black cathode) [ 22–24,26–34 ] but also degrade the light extraction substantially. The light ex...

Metamaterials: Snapping Mechanical Metamaterials under Tension (Adv. Mater. 39/2015).

By exploiting snap-through instabilities, D. Pasini and co-workers design a damage-tolerant mechanical metamaterial that snaps sequentially under tension, thereby accommodating a very large deformation up to 150%. On page 5931, they describe how the nonlinear mechanical response of the metamaterial can be robustly programmed by tuning the architecture of its unit cell.

Monte Carlo analysis of the spectral photon emission and extraction efficiency of organic light-emitting devices

We report on a Monte Carlo method for modeling light transport phenomena in multilayer organic polymer light-emitting devices on plastic flexible substrates. The method allows modeling of Cartesian geometrical structures describing the fate of photons through multiple scattering events determined by the wavelength-dependent material optical properties. We apply the method to analyze the wavelen...

Photovoltaics: A Tetraperylene Diimides Based 3D Nonfullerene Acceptor for Efficient Organic Photovoltaics (Adv. Sci. 4/2015)

Efficient Hash-Based Signatures on Embedded Devices

Authentication and message integrity are essential building blocks for protocols of many security related verification processes like data origin authentication for valid software updates or device authentication. Critical embedded devices like a brake control unit in a car must only accept updates from valid issuers. At the same time it is essential for security and commercial reasons to prove...