The introduction of non-toxic guest cations (zinc, Zn2+) in the synthesis of CsPbX3 NCs leads to the realization of lead-reduced CsPb1-xZnxX3 NCs, confirming the substitution of Pb2+ up to 15%. As-synthesized NCs exhibits lattice contraction accompanied by increased bandgap, blue-shifted photoluminescence emissions, and high quantum yield. Besides, the blue, green, yellow, and red-emitting CsPb1-xZnxX3 NCs (at x=15%) obtained by adjusting the composition of different halides when used as color conversion layers emits warm to cool white light with remarkable color qualities. Notably, this development will promote the halide perovskite NCs one step closer to their practical applications.
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