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In article number 1801985, Dan Liu, Tao Wang and co‐workers introduce an ionic additive, trimethylammonium chloride, in the methyl ammonium iodide precursor solution. Perovskite films prepared from this precursor possess reduced grain boundaries and trap densities. Suppressed non‐radiative recombination and increased carrier diffusion length increase the efficiency of MAPbI3 solar cells from 19.1%...
Organic–inorganic hybrid perovskite solar cells have emerged as one of the promising photovoltaic candidates to generate renewable energy. However, the large amounts of grain boundaries and trap states that exist in the bulk or interfacial regions of perovskite films limit further enhancement of device efficiency. Herein, an additive engineering strategy is introduced employing trimethylammonium chloride...
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