Research of Yera Ussembayev on the cover of Nanomaterials journal

(02-04-2021) The research of Yera Ussembayev and his colleagues of the LCP and PCN research groups is on the cover of Nanomaterials journal.

Quantum dots (QDs) are small semiconductor nanoparticles (typically, around 10-100 atoms in diameter), which have excellent optical properties. They have found many promising applications in light emitting diodes (LEDs), display technology (QLED-TV) and solar concentrators. However, the efficiency of these devices still suffers from uncontrollable directivity of the emitted light.

The researchers of LCP and PCN research groups at Ghent University propose a new strategy to control the direction of the emitted light by tuning the thickness of the deposited QD layer. When the film is very thin (about one-two layers of nanoparticles), the light is fully outcoupled from the plane of the layer. This property makes thin layers especially attractive for lighting systems, like LEDs and TV sets. For thicker QD layers, most of the light is guided towards the edges of the nanostructure, which is at high demand in solar cell concentrator technology.

These findings offer a new root for the smart design and sustainable development of different light-generating systems.

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