Fig. 6: Dieke diagram for 6Nd with the calculated emission spectrum, and the specific Stark splitting for the studied complexes.

δ represents the calculated Stark splitting (in cm−1) between the two doublets \(\Gamma\) and \(\Gamma^{\prime}\) of the 4F3/2 level, used for the Boltzmann distribution. \({\sigma }_{1}\) and \({\sigma }_{2}\) denote the wavenumbers of the lower and higher energy bands, respectively, as determined from band deconvolutions in Fig. S6.