Ultrathin quantum dot LED that can be folded freely as paper

Science Daily  September 27, 2021 Researchers in South Korea have demonstrated that 3D foldable quantum dot light-emitting diodes (QLEDs) can be created using laser patterning and metal etch-stop layers with customized ablation thresholds. The approach allows etching to be limited to selected layers of the multilayered QLEDs, and it can be precisely tuned by using alloy-type etch-stop layers. The approach can be used to create QLED architectures with extremely small bending radii (0.047 mm). They have illustrated its capabilities by fabricating a 3D foldable passive matrix array of QLEDs that can display letters and numbers. The entire QLED including the crease […]

Tailored meta-grid of nanoparticles boosting performance of light-emitting diodes

Phys.org  July 29, 2020 Current methods to use new materials for increasing LED light output are has led to the LED chips becoming bulkier or costly to manufacture. According to a theoretical model proposed by researchers in the UK a significant enhancement in light extraction from LEDs can be achieved by boosting the transmission across LED-chip/encapsulant interface. They propose introducing a monolayer of plasmonic nanoparticles on top of the LED chip which can reduce the Fresnel reflection loss at the chip/encapsulant interface. A similar effect is also applicable for enhancing the trapping of light in solar cells…read more. Open Access […]