POSS Polyimide Composite Sealed Triple-Junction GaAs Thin-Film Solar Cell for Long-Term Low Earth Orbit Serve.

ABSTRACT: Polyhedral oligomeric silsesquioxane (POSS) polyimide is promising for sealing flexible photoelectronic devices for space applications. However, atomic oxygen interaction with POSS polyimide results in a porous SiO_x passivating layer, ultraviolet interaction results in bonding degradation, both causing the transmittance decrease in the visible light range. In this study, the atomic oxygen exposure-induced transmittance decrease of POSS polyimide is explained and simulated by Rayleigh scattering. Ultrathin oxide films and ultraviolet absorbent are introduced to POSS polyimide by surface- and bulk-phase modifications to improve atomic oxygen and ultraviolet resistance, which achieves ≈0 wt% mass loss upon an eight-year long-term atomic oxygen exposure and is deduced by molecular d

SUBMITTER: Qian M 

PROVIDER: S-EPMC12948234 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature