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Orthogonal upconversion with color‐switchable emissions under different excitation conditions provides new chances to diverse frontier applications of luminescent materials. However, the previous orthogonal upconversion systems compulsorily require the precise control of spatial distributions of dopants and host compositions to avoid spectral cross‐talk, greatly limiting their synthesis and application...
Photon Upconversion
In article number 2212037, Bo Zhou and co‐workers describe a conceptual design to realize the orthogonal upconversion through the selective excitation strategy. The switchable red/green, red/blue, and green/blue together with full‐color output are easily achieved at the single nanoparticle level, showing great potential in multi‐level anti‐counterfeiting, information security and...
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