Fig. 2.

(a) Normalized Mn luminescence spectra of Mn-doped (at the interface between the CdS core and ZnS shell) NCs with high local lattice strain at Mn²⁺ sites used for thermometry in this study. (b) Intensity ratio of I₆₀₀/I₆₅₀ at different temperatures (blue dots: experimental data, green line: interpolation curve). (c) Normalized Mn luminescence spectra of typical Mn-doped (in the ZnS shell) NCs with weak local lattice strain at Mn²⁺ ion sites. Insets in (a) and (c) pictorially represent the structures of Mn-doped core/shell NCs with different radial doping locations.