From pv magazine International
Perovskite solar cell technology has come a long way in a relatively short time, but there are still plenty of issues that need to be ironed out to support large-scale production.
Scientists at the University of North Carolina (UNC) say that one of these issues is the annealing (heating and slow cooling) process that perovskites undergo. Many fabrication processes take too long, presenting a significant bottleneck in mass production. The UNC scientists estimate that for long annealing times to keep up with the speed at which perovskites films are produced, manufacturers would need a 500-meter-long oven.
The UNC scientists said that cutting this annealing process down to three minutes at 100 C could actually lead to better performance. The group puts this down to a previously unknown de-doping process within the perovskite, which ultimately leads to lower recombination losses and better efficiency.
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