Decoupling the Exciton‐Carrier Interaction for Highly Efficient Pure Blue Perovskite Light‐Emitting Diodes Exceeding 20%

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Demonstration highlights that decoupling excitons and carriers improves efficiency in PeLEDs, achieving an EQE of 20.3%.

High-performance pure blue PeLEDs achieved an external quantum efficiency of 20.3%, indicating significant progress in device performance.
The photoluminescence quantum yield reached 83.7%, showing the effectiveness of the exciton‐carrier decoupling strategy employed.
The designed emitting layer effectively suppresses Auger recombination, enhancing overall device brightness and longevity.
Operational lifetime of 4.8 hours was recorded at a brightness of 1070 cd m−2, hinting at practical application potential.

Yao et al. (2025) studied this question.

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