CURRENT AFFAIRS

Detailed explanation-1: -IIT Hyderabad develops low-cost, eco-friendly solar cells using ‘kumkum dye’ - The Economic Times.

Detailed explanation-2: -Eight organic dyes are used as sensitizers for dye-sensitized solar cells. These dyes are eosin Y, aniline blue, bromophenol blue, alcian blue, methyl orange, crystal violet, fast green, and carbol fuchsin. The absorption spectra of these dyes are carried out by UV-VIS spectrophotometry.

Detailed explanation-3: -The first solar panel was invented by Charles Fritts in 1883 where he coated a thin layer of selenium with an extremely thin layer of gold. The resulting cells had a conversion electrical efficiency of only about 1%. This invention led to the launching of a movement for producing solar energy.

Detailed explanation-4: -TiO2-based dye-sensitized solar cells Modern DSSCs, or Gratzel cells, were invented in 1988 by Brian O’Regan and Michael Gratzel. During the search for better performance electrodes for electrochemical cells, it was discovered in the late 1960s that illuminated organic dyes can generate electricity at oxide electrodes.

Detailed explanation-5: -There are three types of dye that are commonly used as DSSC sensory materials including chlorophyll [6-7], anthocyanin [8-9], and beta-carotene [10-11]. First chlorophyll, this substance is contained in the leaves of every plant. Chlorophyll can absorb the wavelength of light from red, blue, and violet.