Fig. 1. (a) Molecular and single crystal structures of BOC-PC and BOC-PSi; (b) PL spectra of PC, PSi, BOC-PC and BOC-PSi (in toluene at a concentration of 10 μM); (c) PL decay curves of BOC-PC- and BOC-PSi-based film samples (15 wt% in DPEPO under N₂); (d) calculated Huang–Rhys factors and corresponding vibration modes contributed significantly to the reorganization energy of BOC-PC and BOC-PSi from the S₁ to S₀ states (PBE0/6-31G** at optimized S₁ geometry).