Kolkata researchers used human hair to produce cathodes for solar cells
i. Researchers at the Indian Institute of Science Education and Research(IISER) in Kolkata had used human hair to produce cost-effective, metal-free cathodes for use in solar cells.
ii. This is the first instance where a bio-waste-derived electrode has been used as cathode in a quantum dot sensitised solar cell device.
iii. IISER researchers have developed graphitic porous carbon cathode by cleaning and drying human hair and treating with sulphuric acid to achieve pre carbonization.