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The fabrication of perovskite light‐emitting diodes (PeLEDs) with vacuum deposition shows great potential and commercial value in realizing large‐area display panel manufacturing. However, the electroluminescence (EL) performance of vacuum‐deposited PeLEDs still lags behind the counterparts fabricated by solution process, especially in the field of blue PeLEDs. Here, the fabrication of high‐quality...