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Efficient and stable blue emission of perovskite light‐emitting diodes (PeLEDs) is a requisite toward their potential applications in full‐color displays and solid‐state lighting. Rational manipulation over the entire electroluminescence process is promising to break the efficiency limit of blue PeLEDs. Herein, a facile device architecture is proposed to achieve efficient blue PeLEDs for simultaneously...
Blue PeLEDs
In article number 2103870, Yan‐Qing Li, Jian‐Xin Tang, and co‐workers demonstrate a facile and effective device architecture for efficient sky‐blue perovskite light‐emitting diodes by simultaneously suppressing energetic loss during electron‐photon conversion and enhancing light outcoupling, yielding a record external quantum efficiency of 27.5%.