Scientists in India have added a layer of oxide to the back of silicon cells, boosting efficiency by 7%.

The team at the Sanketika Institute of Technology and Management, India applied a nanocoating of tin oxide onto the , causing exiting light to be scattered back into the solar cell, gaining extra . A typical overall efficiency of solar collectors is around 21%, with losses mainly due to reflection of the heat and light back to the air. Cells coated with an optimum 400 nm tin oxide increased efficiency from 24% to 31%, with a measurable decrease in heat loss due to convection.

This work follows earlier studies by the Indian Institute of Engineering Science and Technology, working with the National Institute of Solar , India demonstrating a 5% efficiency increase using similar technology.

Sanketika Institute of Technology and Management paper July 2017
Indian Institute of Engineering Science and Technology paper December 2016


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