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The highest efficiencies reported for perovskite solar cells so far have been obtained mainly with methylammonium and formamidinium mixed cations. Currently, high‐quality mixed‐cation perovskite thin films are normally made by use of antisolvent protocols. However, the widely used “antisolvent”‐assisted fabrication route suffers from challenges such as poor device reproducibility, toxic and hazardous...
The charge‐carrier balance strategy by interface engineering is employed to optimize the charge‐carrier transport in inverted planar heterojunction perovskite solar cells. N,N‐Dimethylformamide‐treated poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) and poly(methyl methacrylate)‐modified PCBM are utilized as the hole and electron selective contacts, respectively, leading to a high power conversion...
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