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Lattice-homogenized Br/I alloyed CsPb(Br/I)3 red quantum dots for wide-color-gamut WLEDs
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DOI：10.1016/j.optmat.2026.118260.png)
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Abstract
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• Lattice-level halide homogenization, not physical blending, enables stable red emission in CsPb(Br/I)3. • CsPbBr1I2 is optimal for pure red emission at 640 nm. • Strengthened Pb–Br bonding and vacancy passivation suppress phase transition and ion migration. • CsPbBr1I2 exhibits 288 ns lifetime and >70% PL retention under heat, moisture, and light. • WLED achieves ultrawide color gamut: 127.07% NTSC, 94.88% Rec. 2020.
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