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代替タイトル: フッ素化超分子を用いた高効率で安定なメチルアンモニウムフリーのペロブスカイト太陽電池の分子パッシベーション

説明:

Perovskite solar cells (PSCs) with state-of-the-art efficiencies consist of thermally unstable methylammonium (MA). Though the MA-free perovskite has superior thermal stability, there is a challenge to control the formation of the δ-perovskite phase which lowers device performance. In this work, we have employed the surface passivation method with multifunctional fluoroarene molecule which suppresses the formation of PbI2 and δ-perovskite phase in MA/Br-free perovskite film. It effectively mitigates the defects at surface or grain boundaries in perovskite film with fluoroarene embedded interfacial layer as a consequence of stronger halogen bonding with fluoroarene moieties or NH-NH2 terminal. As a result, the PSC with a p-i-n configuration achieved superior operational thermal stability and a device efficiency exceeding 22 % with a large area of ~1 cm2 which is a record-level device efficiency for MA/Br-free inverted PSCs. This approach underscores a universal strategy for defect passivation to further improve both the efficiency and operational thermal stability of PSCs and other optoelectronic application.
Reference:
1) D. B. Khadka,* Y. Shirai, M. Yanagida, T. Tadano, K. Miyano, Advanced Energy Materials. 2022, 2202029.
2) D. B. Khadka,* Y. Shirai, M. Yanagida, K. Miyano; ACS Appl. Mater. Interfaces, 2019, 11, 7055.
3) D. B. Khadka, Y. Shirai, M. Yanagida, J. W. Ryan, K. Miyano, J. Mater. Chem. C, 2017, 5, 8819.

権利情報:

• In Copyright
  

キーワード: Perovskite Solar cells, Interface Passivation

会議: The 1st KOSEN Research International Symposium (2023-03-01 - 2023-03-02)

研究助成金:

原稿種別: 論文以外のデータ

MDR DOI: https://doi.org/10.48505/nims.6527

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更新時刻: 2026-09-17 14:00:33 +0900

MDRでの公開時刻: 2026-09-17 16:28:22 +0900