Abstract
Optical properties of (organic polymethylphenylsilane)-silica hybrid thin films prepared by a sol-gel method have been studied by means of steady-state and time-resolved photoluminescence (PL) spectroscopies. It is found from these measurements that with reducing polysilane concentration in the hybrid thin films the PL quantum efficiency is improved and the PL decay becomes faster. On the basis of a one-dimensional exciton diffusion model, these results can be interpreted that the hybrid thin films with lower polysilane concentration have lower exciton diffusion constants.
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