27 May '16, 9am

Perovskite solar cells yield another secret: A source of loss in Perovskite solar cells could di...

Perovskite solar cells yield another secret: A source of loss in Perovskite solar cells could di...

Organic-inorganic metal halide perovskite solar materials are rapidly catching silicon in efficiency, and are showing promise as a mass produceable large scale technology. However, a lot of issues remain to be solved, and it looks like one of them has just fallen. In international team has found out why intense light can usefully modify the crystal structure. “What we’re finding, is that there are some defects that can be healed under light,” said Samuel Stranks, who is a professor at both MIT and the University of Cambridge. The defects in question are traps, where electrons wastefully recombine with atoms before they can be extracted to do anything useful. It appears from the research that high-power light exposure causes iodine ions to migrate away from the illuminated region, sweeping traps away as they go. “This is the first time this has been shown,” said Stranks , “...

Full article: http://www.electronicsweekly.com/news/research-news/perov...

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