The application of PHPS in the field of solar cell coating has increased significantly in recent years, and it plays a variety of key roles in solar cell equipment. For example, PHPS is used to make a dielectric barrier layer for a solar cell, which is placed between a metal or glass substrate and a CIS (copper indium sulfide) or CIGSe (copper indium gallium selenide) photovoltaic structure. A thin film solar cell packaging layer made of PHPS allows chalcopyrite-based solar cells to have an average reflectivity of less than 95% at the optical band of 300 to 900nm and more than 200% at the band of 1100 to 1500nm, showing excellent aging resistance. PHPS is used to prepare an anti-glare film for solar cells, which has an appropriate anti-glare surface texture and can effectively remove surface contamination. Vacuum ultraviolet light is used to convert PHPS into silica to package flexible perovskite solar cells (PSC). In order to prevent PSC degradation caused by PHPS solution and VUV (λ=172nm) light, CdSe/ZnS quantum dots are used as a barrier layer to distribute on the polydimethylsiloxane substrate, and the water vapor transmission rate of the package layer is extremely low. The room temperature service life of the flexible solar cell is increased by more than 400 hours.

In addition, by dissolving PHPS in xylene and hydrolyzing with ammonia water, the perovskite film is further adhered to the dense layer of titanium oxide, which provides a new idea for the large-scale production of perovskite photovoltaic.

In addition to traditional dielectric, barrier and optical layers, PHPS is also used to prepare other functional layers. PHPS is used to form a compound layer on the substrate, where a portion of the silazane compound is converted into a compound containing siloxane bonds, and a metal layer with silver as the main component is formed on it to make a transparent conductive film. Studies have shown that wavelength conversion films prepared using solutions containing PHPS and wavelength conversion agents can increase the visible light transmittance of the films to 50% or more compared to aqueous solutions. An oxide layer stacked sequentially on a metal substrate and a silicon dioxide coating formed by PHPS curing are used as thermal insulation panels for electronic components, which demonstrate good thermal conductivity and insulation properties. PHPs block copolymers containing A straight chain or ring block A and a silicon-rich polysilazane skeleton block B were prepared by light crosslinking with the help of crosslinking agents. These block copolymers have a unique structure that enables the preparation of a thick, high-density sacrificial film with good adhesion to the substrate, providing an additional functional layer for solar cells. These studies show that PHPS, as a multifunctional material, has a very wide range of applications in the field of solar cells, not only limited to improving the efficiency and life of the battery, but also to enhancing the environmental stability and reliability of the battery. Through different treatments and applications of PHPs, high-performance solar modules that meet specific needs can be prepared, which further promotes the development of solar technology and the progress of the photovoltaic industry.

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