PHPS is commonly used in the manufacture of optical films by combining it with modified raw materials to form composites that can be used in the preparation of optical films. A method of preparing a low refractive index film using a combination of PHPS and at least one organic polymer selected from silicone-containing silazanes, siloxysilazanes, and urethane-containing silicone-containing silicone-containing silicone-containing silicone-containing silicone-containing silicone. The PHPS-containing solution was mixed with the fluoropolymer-containing solution and coated to produce a high-strength, oleic acid-resistant and easy-sliding silica optical film layer A spiropyran (SP)-doped silica coating was prepared using a xylene solution of PHPS as a precursor; the film changed from a transparent light yellow color to a red color with an increase in absorbance at 500 nm as the PHPS was converted to silica. After exposure treatment, the films deepened in color and exhibited reversible photochromic properties, demonstrating their potential for optical film applications.
In addition to the type of raw material, the preparation method also has a significant impact on the optical film properties.Nakagawa et al. prepared PHPS-converted organic-inorganic hybrid films by sol-gel method, which were applied to the active layer of OLEDs and showed excellent electroluminescence properties.Lee et al. spin-coated HPS layers on Si(100) by dibutyl ether solution and irradiated them using 405 nm UV light. , a dense silicon oxide crosslinked layer was produced in water or hydrogen peroxide, demonstrating the effect of the preparation process on the stoichiometric ratio and refractive index.Baek et al. prepared a SiOx layer by treating HPS with intense pulsed ultraviolet light (IPL) in an air ambient and at low temperatures, showing similar conversion and refractive indices as the heat-treated silica layer, proving the potential of the IPL process for application in the optical thin-film industry. These studies demonstrate that the properties of optical films can be significantly affected by tuning the raw materials and preparation methods, providing diverse avenues for optical thin film preparation.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.