fig11

Figure 11. (A) Schematic representation of RET process from UCNPs to CsPbBr₃ PKNCs in N*LC (the emissions of CsPbBr₃ PKNCs and UCNPs were located at the center and the edge of the photonic bandgap, respectively, left) and UC-CPL spectra of CsPbBr₃ PKNCs/UCNPs in N*LC with different incident power of a 980 nm laser (right). Reproduced with permission from Ref.^[77]. Copyright (2020) John Wiley and Sons. (B) NIR-CPL spectra (top) of both the enantiomers of Yb(TTA)₃ⁱPrPybox (left) and Yb(TTA)₃PhPybox (right) and total NIR emission (bottom). Reproduced with permission from Ref.^[78]. Copyright (2019) Royal Society of Chemistry. RET: Radiative energy transfer; PKNCs: perovskite nanocrystals; UCNP: upconverting nanoparticles; TTA: 2-thenoyltrifluoroacetonate.