(The Gist of Science Reporter) OLED  [MARCH-2018]


(The Gist of Science Reporter) OLED

 [MARCH-2018]


OLED

Organic Light Emitting Diode (OLED) is a newer “display technology for mobiles and monitors. It consists of an organic layer sandwiched between two conducting sheets (an Anode and a cathode) with a glass plate the top (seal) and bottom (substrate). The carbon-based organic material emits electro-luminescent light when electricity is applied across the two conducting sheets. The panel is much thinner as it does not require backlight and filters. OLEDs are superior to LCDs in their exceptional colour reproduction, blazing fast response times, wider Viewing angles, higher brightness and extremely light weight designs.

PLASTICS are inexpensive and durable materials, finding use in a wide range of applications. As a consequence, the production of plastic has increased over the years and current levels of their usage generate several environmental crises. The indiscriminate burning of plastic results in emission of deadly gases and carcinogens into the environment. Dumping them in landfills results in leaching of toxins into round and surface water resources.

They have also formulated effective strategy of upcycling polyethylene terephthalate (PET) into a functional material to mitigate another critical environmental problem --the emerging levels of antibiotics in water. Dr. Premanjali Rai and Dr. Kunwar P. Singh from the Environmental Chemistry Division, CSIR-IITR, have collected PET refuse from the surroundings and converted the same into a magnetically responsive carbon nano-material by carbonisation and activation of the PET char under controlled conditions and magnetic modification by a simple chemical precipitation route. The widely used antibiotic, Cephalexin, is detected as a micro pollutant in the environment. The study suggests that the minimal adsorbent dose of 0.4 gram per liter could remove greater than half of the initial Cephalexin concentration under laboratory conditions.

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