LED stands for, light-emitting diode display. It is a screen display technology, in which panels of LED are used as a light source. Various electronic devices use this technology, as a medium of interaction between the user and the device itself. Most devices such as the modern day mobile phones, televisions, tablets, computers, and laptops are using LEDs. There are a lot of benefits we get by using LED technology.
The slim and sleek screen can be adjusted at any place. They generally consume lesser energy, as a result save a lot of power. A chemist named USC Dornsife have discovered a way in which smartphones and television screens light up, but in a much cheaper way. This will save a lot of money, not only for the user but the manufactures can take advantage of it too. And the remarkable thing about this discovery is that it would not ruin the visual quality of the screen.
1.Why was Iridium used?
Another chemist, Mark Thompson discussed that Iridium was used in this cause as it is very efficient in terms of light emission, at the same time it is the rarest of the naturally-occurring elements present on Earth. There were attempts of developing the same result from copper but that failed completely. One reason for this was that a molecule of copper was less stable and had a shorter life span than Iridium compounds.
There is a hypothesis that describes the rarity of Iridium, that it was present in the meteor that landed on the Earth and wiped out the dinosaurs about 65 million years ago. Demand for Iridium is increasing day by day. At the same time it is getting scarcer. OLEDs have almost replaced LED and LCD screens. The difference between them is that in an OLED screen, each pixel will emit light. On the contrary, in LCD screens, LED backlight is responsible for the pixels that generate light.
2.What you need to know about Blue Chemistry
Another thing that makes Iridium a poor element in this case is that it has very weak molecules, in order to generate blue light. Basically, Iridium gets excited and produces two colours of the LED screen’s primary colours which are, red and green, that too efficiently, rapidly and in the electronic devices that have high operational lifetimes. The third colour that is required in this case is blue, and it has become the ruining factor for OLED technology as blue emissive OLEDs have a short life span.
Mark Thompson provided details that the bonds present between the blue molecules usually break down. Blue molecules have a disadvantage of consuming more electricity to get exited. The poor performance of blue molecules in a LED can result in poor visual quality wherever blue colour is present. But that is no longer a problem because Mark Thompson and his team members have worked together to discover the new copper compound that is a much more stable, complex molecule than the copper compounds used prior to this discovery.