Unlocking NIR-II Photoluminescence in 2D Copper Tetrasilicate Nanosheets through Flame Spray Synthesis.

The bathochromic shift in emission maxima for the doped CTS structures showed only a slight correlation with the Cu─O bond lengths of the square‐planar coordinated Cu 2 + ions but did not exhibit a significant trend when compared to the M ─O bond lengths. 2.6 Laser Irradiation Induced Lattice Rearrangement One of the significant advantages of the FSP‐synthesis process is its ability to decouple elemental mixing from the annealing process.

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The PL‐QY decreases with bathochromic shifted emission maxima, following an overall trend of a second‐order polynomial fit.

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