[20a-C302-1~11] 12.5 Organic and hybrid solar cells

10:00 AM - 10:15 AM JST(1:00 AM - 1:15 AM UTC)English Presentation

[20a-C302-5] Rapid Densification of Polysilazane Coated Films Achieving Record-High Moisture Barrier Performance Using High-Power VUV Irradiation

〇He Sun¹, Luyang Song¹, Yoshiyuki Suzuri¹ (1.Yamagata Univ.)

Keywords:

moisture barrier,VUV irradiation,PHPS densification

The commercial viability of organic electronics highly depends on achieving long lifetimes. The instability of organic materials in the presence of oxygen and water vapor is a significant challenge. This study enhances the moisture barrier properties of PHPS-coated films using VUV irradiation. We examine the effects of VUV light intensities (103 to 309 mW/cm²) on film densification and WVTR performance. At 103 mW/cm², films showed moderate densification and reduced WVTR, indicating some improvement. At 309 mW/cm², films achieved rapid and significant densification, with record-low WVTR values of 1.6x10^-5 g/m²/day in 19.4 s per layer and 3.8x10^-5 g/m²/day in 9.7 s. This rapid densification is due to accelerated Si-N bond formation, reducing free volume and increasing density. Optimizing VUV irradiation intensity is key for high-performance barrier films. This study enables efficient large-scale production of superior barrier films, essential for perovskite solar cells.