Dynamical fluorescence properties of permethyldecasilane, CH3[Si(CH3)2]10CH3, doped in 3-methylpentane glass matrices at various concentrations were investigated by means of subnanosecond time-resolved fluorescence spectroscopy. Two spectral components were resolved by fitting analysis of the fluorescence spectra, yielding decay lifetimes and the time constants of temporal shift for each resolved peak. For the higher-energy component, the peak position was found to be independent of the concentration with its fluorescence lifetime changing slightly. For the lower-energy component, in contrast, the amount of red-shift of the fluorescence peak became larger with increasing the concentration while its fluorescence lifetime was also strongly concentration dependent. These results are discussed in terms of the formation of H-aggregates of oligosilane molecules in the glass matrices.
Ichino, Y., Minami, N., & Yatabe, T. (2000). Radiative relaxation in oligosilane aggregates. Journal of Luminescence, 87, 727–729. https://doi.org/10.1016/S0022-2313(99)00376-2