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Perovskite solar cells (PSCs) have demonstrated over 25% power conversion efficiency (PCE) via efficient surface passivation. Unfortunately, state‐of‐the‐art perovskite post‐treatment strategies can solely heal the top interface defects. Herein, an ion‐diffusion management strategy is proposed to concurrently modulate the top interfaces, buried interfaces, and bulk interfaces (i.e., grain boundaries)...
Perovskite light‐emitting diodes (Pero‐LEDs) with external quantum efficiencies (EQEs) of over 20% have been achieved in the last several years. However, the reproducibility of such high‐efficiency Pero‐LEDs is still low. The perovskite film quality, especially for the non‐radiative defects, is crucial in determining the device performance. These defects may lie in bulk grains, grain boundaries, and...
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