September 10, 2025ACS Nano

Hard–Soft-Acid–Base Management Enabled Bright and Stable Pure-Blue Perovskite Quantum Dot LEDs

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First-principles calculations reveal optimal alkali metal ions, boosting external quantum efficiencies in LEDs.

The achieved external quantum efficiency of pure-blue perovskite QD LEDs reached 15.7% at high luminance levels.
Rubidium ions were identified as optimal for enhancing bonding and QD performance, improving stability significantly.
The study utilized first-principles calculations to evaluate bonding interactions, leading to a 35-fold efficiency improvement.
High luminance reached 5371 cd m-2 while maintaining an EQE of 14.9%, surpassing previous records for similar LEDs.

Xie et al. (2025) studied this question.

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