TECHNOLOGY FOCUS - POLYMERS - Preparation (Disclosed): Preparation of (I) comprises: dissolving dichloro(tetraphenyl)silole into tetrahydrofuran (THF), and stirred in an inert gas atmosphere, and the resulting mixture is extracted, followed by washing, filtering, and distillation under reduced pressure, to give dihydroxy(tetraphenyl)silole (2a); and dissolving (2a) in THF in the presence of sulfuric acid, followed by polymerization under reflux (condensation)to give poly(tetraphenyl)silole siloxane powder of formula (II).    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: (I) is (II) that has a weight average molecular weight of 800-50000. The organic-inorganic hybrid polymer charges tunnel from a well layer to a barrier layer of the quantum well structure at the time of application of external electric field. The thin film is obtained by coating and curing a solution containing (I). The step of curing is performed at 100-350 degrees C. The thin film has a refractive index of 1.55-1.62, dielectric constant of 3-3:5, flat band shift of 1-20 V and charge trap density of 0.03-0.06 C/cm8. The thin film contains (II), and a distance between two adjacent phenyl groups of (tetraphenyl)silole siloxane monomers of the poly(tetraphenyl)silole siloxane is 0.2-0.5 nm. EXAMPLE - Dichloro(tetraphenyl)silole (2 g) was dissolved into aqueous tetrahydrofuran (THF)/water (1/4) (50 ml), and stirred for 2 hours under argon atmosphere. The resulting mixture was extracted with ether. The extract was washed with distilled water and brine, and then dried over anhydrous magnesium sulfate to remove water, followed by filtering. The resulting filtrate was distilled under reduced pressure to give pure dihydroxy(tetraphenyl)silole (a9). (a9) (1 g) was dissolved in THF (50 ml), and then refluxed with sulfuric acid (3 ml) for polymerization over 2 hours at 66 degrees C. The resulting solvent was removed by distillation under reduced pressure. The resulting residual solid was dissolved in THF (5 ml), and mixed into hexane (100 ml) to give poly(tetraphenyl)silole siloxane (60%) as a light-brown powder.