TAG: Green lightning

Giving It The Green Light

Greener lighting at home

These days when we go shopping for a new laptop or television we are looking for the thinnest and lightest product available. Researchers have come up with graphene based electrode technology which make affordable and energy efficient display technology that could be a good alternative to light bulbs. Interestingly it is so sleek that it could even be used as wallpaper or applied to ceilings. Almost all modern devices use organic light emitting diodes (OLED) for display which are energy efficient but also have some drawbacks. The slimness comes with a cost making it very expensive compared to CRT or LCD type displays. OLED… read more

Brighter And Lighter

Full-colour quantum dot displays fabricated by transfer printing

An innovation in LED lighting achieved through the use of quantum dots has greatly increased the efficiency, brightness, lifetime and low turn-on voltage of this energy source. A research team at Seoul National University, South Korea has published their research in a recent issue of Nano Letters. They found that the key to improving the brightness and efficiency of the QLEDs (Quantum Light Emitting Diode) comes from improving the injection of current-carrying electrons and holes into the quantum dots. The more efficiently the electrodes can inject electrons and holes into the quantum dots, the more efficiently QLED can emit light. The anodes… read more