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In this work, we demonstrated a high performance planar heterojunction perovskite solar cell with the polyethylenimine ethoxylated (PEIE) interlayer. By adopting a less polar solvent for PEIE, enhanced device performance and uniformity are achieved. The power conversion efficiency (PCE) of the best device increases by 22% compared to the reference device and reaches 14.82% with JSC of 19.45mA/cm2,...
In this work, the long‐term stability for inverted organic solar cells (OSCs) using a poly(3‐hexylthiophene‐2, 5‐diyl):[6, 6]‐phenyl C61 butyric acid methyl ester blend and a low‐temperature ZnO buffer layer processed from aqueous solution is investigated. The same devices with ZnO buffer layers annealed at different temperatures have been sequentially stored in an air‐N2–air environment and tested...
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