We alloyed Zn 2+ into CsPbI 3 perovskite nanocrystals by partial substitution of Pb 2+ with Zn 2+, which does not change their crystalline phase. The resulting alloyed CsPb 0.64 Zn 0.36 I 3 nanocrystals exhibited an improved, close-to-unity photoluminescence quantum yield of 98.5% due to the increas...
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