Presentation Information
[25p-22C-6]Life time of a see-through-type-top-cell of perovskite/silicon tandem solar cells
〇Takeshi Gotanda1,6, Itsuki Hirano1, Ai Mizuno1, Takeshi Kitamura2, Daisuke Hirotani3, Daishiro Nomura3, Masahiro Hayashi4, Takatoshi Nomura4, Masaki Nakamura5, Tomoyuki Hirami5, Shuzi Hayase2 (1.Toshiba Energy Systems & Solutions, 2.UEC, 3.FUJICO, 4.CKD, 5.USHIO, 6.Toshiba)
Keywords:
perovskite,tandem,solar cells
Outdoor operation of perovskite/Si tandem solar cells was reported by some researchers. The PCE-loss was from 7 to 20% for some months or one year in the previous reports. We have reported that sputter deposition of TCO damages perovskite, and it is a reason for a short-lifetime of the tandem PV. And we discovered that the reaction-gas (oxygen) for sputter deposition damaged perovskite, and that reducing reaction-gas was preferable as spattering-condition in 2019. In addition, TCO made on the preferable condition, has blocked ion migration from perovskite. The role of TCO was helpful for the lifetime. Our perovskite/Si tandem PV has showed the highest stability on the light-soaking-test in the world.
We made top cells consisted of TCO as plus/minus electrodes, onto glass substrate using preferable sputtering-condition with the aim of evaluating degradation of the top cell because the top cell is a bottle neck of the lifetime on perovskite/Si tandem PV. And then, we performed 4-months outdoor operation which included a summer season using the top cell. Our top cell showed higher stability than previous reports in an outdoor operation.
We made top cells consisted of TCO as plus/minus electrodes, onto glass substrate using preferable sputtering-condition with the aim of evaluating degradation of the top cell because the top cell is a bottle neck of the lifetime on perovskite/Si tandem PV. And then, we performed 4-months outdoor operation which included a summer season using the top cell. Our top cell showed higher stability than previous reports in an outdoor operation.