[17a-W9_325-1~6] 16.3 Bulk, thin-film and other silicon-based solar cells

11:00 AM - 11:15 AM JST(2:00 AM - 2:15 AM UTC)

[17a-W9_325-5] Study on degradation suppression for silicon heterojunction solar cells by preventing sodium diffusion from cover glass

〇Kazuma Ito¹, Xu Han¹, Zhengxin Liu², Shinichi Muguruma³, Keisuke Ohdaira⁴, Kazuhiro Gotoh^1,5, Atsushi Masuda^1,5 (1.Grad. Sch. Sci. Tech., Niigata Univ., 2.SIMIT, 3.Kuraray, 4.JAIST, 5.IRCNT, Niigata Univ.)

Keywords:

PV modules,Accelerated aging test

In this study, it was found that the significant performance degradation of SHJ cells after Damp Heat (DH) testing could be suppressed by using alkali-free glass or soda-lime glass coated with a SiNx barrier film, instead of standard soda-lime glass. This suggests that sodium (Na) is involved in the performance degradation of SHJ cells under high-temperature and high-humidity conditions. Furthermore, it was demonstrated that a module structure employing a combination of both EVA and PVB encapsulants can also mitigate this performance decline.