Written by Sandra Henderson 14 October 2014
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Investigating the working principle of perovskite solar cells, scientists at the Max Planck Institute for Polymer Research in Mainz, Germany, have observed that holes do not reach their electrodes as fast as electrons do. Thus, positively charged holes accumulate in the perovskite layer. Dissolving this charge transport jam could boost efficiencies of perovskite solar cells — already inexpensive and simple to produce — well beyond 20%.
Berger has high hopes for the future of perovskite solar devices. “Assuming one will find nontoxic perovskite materials allowing to make solar cells with efficiencies above 20% that can sustain for let's say 10 years, then I am convinced that these types of solar cells will be profitable for the industry and change the whole business of solar energy.”